$$ \Gamma(\gamma\phi)/\Gamma_{\text{total}} \qquad \Gamma_{97}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt; 6</td><td>90</td><td>0.1 ± 1.6</td><td>1 BENNETT</td><td>08A</td><td>CLEO ψ(2S) → γγφ</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>&lt;16</th><th>90</th><th>15 ± 7</th><th>2 ABLIKIM</th><th>11E</th><th>BES3 ψ(2S) → γγφ</th></tr></thead></table>

¹BENNETT 08A reports < 6.4 × 10⁻⁶ from a measurement of Γ(χ₀(1P) → γφ) / Γ<sub>total</sub> × [B(ψ(2S) → γχ₀(1P))] assuming B(ψ(2S) → γχ₀(1P)) = (9.2 ± 0.4) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ₀(1P)) = 9.77 × 10⁻².

²ABLIKIM 11E reports < 16.2 × 10⁻⁶ from a measurement of Γ(χ₀(1P) → γφ) / Γ<sub>total</sub> × [B(ψ(2S) → γχ₀(1P))] assuming B(ψ(2S) → γχ₀(1P)) = (9.62 ± 0.31) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ₀(1P)) = 9.77 × 10⁻².

$$ \Gamma(e^{+} e^{-} J/\psi(1S))/\Gamma_{\text{total}} \qquad \Gamma_{99}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>1.54 ± 0.33 ± 0.04</th><th>56</th><th>1.2 ABLIKIM</th><th>17I</th><th>BES3 ψ(2S) → γe<sup>+</sup> e<sup>-</sup> J/ψ</th></tr></thead></table>

¹ABLIKIM 17I reports (1.51 ± 0.30 ± 0.13) × 10⁻⁴ from a measurement of Γ(χ₀(1P) → e⁺ e⁻ J/ψ(1S)) / Γ<sub>total</sub> × [B(ψ(2S) → γχ₀(1P))] assuming B(ψ(2S) → γχ₀(1P)) = (9.99 ± 0.27) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ₀(1P)) = (9.77 ± 0.23) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

²Not independent from other measurements reported by ABLIKIM 17I

$$ \Gamma(e^{+} e^{-} J/\psi(1S))/\Gamma(\gamma J/\psi(1S)) \qquad \Gamma_{99}/\Gamma_{94} $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>9.5 ± 1.9 ± 0.7</td><td>56</td><td>1 ABLIKIM</td><td>17I</td><td>BES3 ψ(2S) → e<sup>+</sup> e<sup>-</sup> γJ/ψ</td></tr></tbody></table>

¹Uses B(ψ(2S) → γχ₀(1P)) × B(χ₀(1P) → γJ/ψ(1S)) = (15.8 ± 0.3 ± 0.6) × 10⁻⁴ from ABLIKIM 17n and accounts for common systematic errors.

$$ \Gamma(\mu^{+} \mu^{-} J/\psi(1S))/\Gamma(e^{+} e^{-} J/\psi(1S)) \qquad \Gamma_{100}/\Gamma_{99} $$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;0.14</td><td>90</td><td>&lt;9.5</td><td>ABLIKIM</td><td>192</td><td>BES3 ψ(2S) → γχ<sub>C</sub> → γ(μ<sup>+</sup> μ<sup>-</sup> J/ψ)</td></tr></tbody></table>

$$ \Gamma(\gamma\gamma)/\Gamma(\gamma J/\psi(1S)) \qquad \Gamma_{98}/\Gamma_{94} $$

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

¹.45 ± 0.13 OUR FIT Error includes scale factor of 1.6.

².0 ± 0.4 OUR AVERAGE

<table><thead><tr><th>2.2 ± 0.4</th><th>+0.1</th><th>-0.2</th><th>1 ANDREOTTI</th><th>04</th><th>E835 p̄p → χ₀ → γγ</th></tr></thead></table>

<table><thead><tr><th>1.45 ± 0.7</th><th>2 AMBROGIANI</th><th>00B</th><th>E835 p̄p → χ₂ → γγ, γJ/ψ</th></tr></thead></table>

¹The values of B(p̄p)B(γγ) and B(γγ)B(γJ/ψ) measured by ANDREOTTI 04 are not independent. The latter is used in the fit because of smaller systematics.

²Calculated by us using B(J/ψ(1S) → e⁺ e⁻) = 0.0593 ± 0.0010.

$$ \Gamma(p̄p)/\Gamma_{\text{total}} \times \Gamma(\gamma J/\psi(1S))/\Gamma_{\text{total}} \qquad \Gamma_{58}/\Gamma \times \Gamma_{94}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-7</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

³.11 ± 2.2 OUR FIT Error includes scale factor of 1.4.

².8 ± 2.1 OUR AVERAGE

<table><thead><tr><th>28.0 ± 1.9 ± 1.3</th><th>392</th><th>1,2,3 BAGNASCO</th><th>02</th><th>E835 p̄p → χ₀ → J/ψγ</th></tr></thead></table>

<table><thead><tr><th>29.3 ± 5.7</th><th>4.7 ± 1.5</th><th>89</th><th>1,2 AMBROGIANI</th><th>99B p̄p → χ₀ → J/ψγ</th></tr></thead></table>

¹Values in Γ(p̄p) × Γ(γJ/ψ(1S))/Γ<sub>total</sub> and Γ(p̄p)/Γ<sub>total</sub> × Γ(γJ/ψ(1S))/Γ<sub>total</sub> are not independent. The latter is used in the fit since it is less correlated to the total width.

²Calculated by us using B(J/ψ(1S) → e⁺ e⁻) = 0.0593 ± 0.0010.

³Recalculated by ANDREOTTI 05A.

## $\chi_{c0}(1P)$ CROSS-PARTICLE BRANCHING RATIOS

$$ \Gamma(\chi_{c0}(1P) \rightarrow p\bar{p})/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c0}(1P))/\Gamma_{\text{total}} \qquad \Gamma_{58}/\Gamma \times \Gamma_{179}^{(2S)}/\Gamma^{(2S)} $$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

².16 ± 1.3 OUR FIT Error includes scale factor of 1.5.

².37 ± 1.0 OUR AVERAGE

<table><thead><tr><th>23.7 ± 0.8 ± 0.9</th><th>1222</th><th>ABLIKIM</th><th>13V</th><th>BES3 ψ(2S) → γp̄p</th></tr></thead></table>

<table><thead><tr><th>23.7 ± 1.4 ± 1.4</th><th>383 ± 22</th><th>1 NAIK</th><th>08</th><th>CLEO ψ(2S) → γp̄p</th></tr></thead></table>

<table><thead><tr><th>23.6 ± 3.7</th><th>3.4 ± 3.4</th><th>89.5</th><th>+14</th><th>-13</th><th>BAI</th><th>04F</th><th>BES ψ(2S) → γχ₀(1P) → γp̄p</th></tr></thead></table>

¹Calculated by us. NAIK 08 reports B(χ₀ → p̄p) = (25.7 ± 1.5 ± 1.5 ± 1.3) × 10⁻⁵ using B(ψ(2S) → γχ₀) = (9.22 ± 0.11 ± 0.46)%.

$$ \Gamma(\chi_{c0}(1P) \rightarrow p\bar{p})/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c0}(1P))/\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^{+} \pi^{-}) \qquad \Gamma_{58}/\Gamma \times \Gamma_{179}^{(2S)}/\Gamma^{(2S)} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

⁶.2 ± 0.4 OUR FIT Error includes scale factor of 1.5.

<table><thead><tr><th>4.6 ± 1.9</th><th>1 BAI</th><th>98I</th><th>BES ψ(2S) → γχ₀ → γp̄p</th></tr></thead></table>

¹Calculated by us. The value for B(χ₀ → p̄p) reported in BAI 98i is derived using B(ψ(2S) → γχ₀) = (9.3 ± 0.8)% and B(ψ(2S) → J/ψ(1S)π⁺π⁻) = (32.4 ± 2.6)% [BAI 98d].

$$ \Gamma(\chi_{c0}(1P) \rightarrow \Lambda\bar{\Lambda})/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c0}(1P))/\Gamma_{\text{total}} \qquad \Gamma_{71}/\Gamma \times \Gamma_{179}^{(2S)}/\Gamma^{(2S)} $$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

³⁵.2 ± 1.3 OUR FIT

³⁵.1 ± 1.4 OUR AVERAGE Error includes scale factor of 1.1.

<table><thead><tr><th>35.6 ± 1.0 ± 1.0</th><th>1486</th><th>ABLIKIM</th><th>21L</th><th>BES3 ψ(2S) → γpπ⁻ p̄p⁺</th></tr></thead></table>

<table><thead><tr><th>31.2 ± 3.3 ± 2.0</th><th>131</th><th>1 NAIK</th><th>08</th><th>CLEO ψ(2S) → γΛπ</th></tr></thead></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>32.0 ± 1.9 ± 2.2</th><th>369</th><th>2,3 ABLIKIM</th><th>13H</th><th>BES3 ψ(2S) → γΛπ</th></tr></thead></table>

¹Calculated by us. NAIK 08 reports B(χ₀ → Λπ) = (33.8 ± 3.6 ± 2.2 ± 1.7) × 10⁻⁵ using B(ψ(2S) → γχ₀) = (9.22 ± 0.11 ± 0.46)%.

²Superseded by ABLIKIM 21L

³Calculated by us. ABLIKIM 13H reports B(χ₀ → Λπ) = (33.3 ± 2.0 ± 2.6) × 10⁻⁵ from a measurement of B(χ₀ → Λπ) × B(ψ(2S) → γχ₀) assuming B(ψ(2S) → γχ₀) = (9.62 ± 0.31)%.

$$ \Gamma(\chi_{c0}(1P) \rightarrow \Lambda\bar{\Lambda})/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c0}(1P))/\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^{+} \pi^{-}) \qquad \Gamma_{71}/\Gamma \times \Gamma_{179}^{(2S)}/\Gamma^{(2S)} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

<table><thead><tr><th>10.1 ± 0.4 OUR FIT</th><th>15.2<sup>+4.2</sup><sub>-4.0</sub></th><th>1 BAI</th><th>03E</th><th>BES ψ(2S) → γΛπ</th></tr></thead></table>

¹BAI 03E reports [B(χ₀ → Λπ) B(ψ(2S) → γχ₀) / B(ψ(2S) → J/ψπ⁺π⁻)] × [B²(Λ → π⁻ p) / B(J/ψ → p̄p)] = (2.45<sup>+0.68</sup><sub>-0.65</sub> ± 0.46)%. We calculate from this measurement the presented value using B(Λ → π⁻ p) = (63.9 ± 0.5)% and B(J/ψ → p̄p) = (2.17 ± 0.07) × 10⁻³.

$$ \Gamma(\chi_{c0}(1P) \rightarrow \Lambda\bar{\Lambda}\eta)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c0}(1P))/\Gamma_{\text{total}} \qquad \Gamma_{76}/\Gamma \times \Gamma_{179}^{(2S)}/\Gamma^{(2S)} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.26 ± 0.30 ± 0.20</td><td>67</td><td>ABLIKIM</td><td>22AO</td><td>BES3 ψ(2S) → γpπ⁻ p̄p⁺ γγ</td></tr></tbody></table>

$$ \Gamma(\chi_{c0}(1P) \rightarrow \gamma J/\psi(1S))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c0}(1P))/\Gamma_{\text{total}} \qquad \Gamma_{94}/\Gamma \times \Gamma_{179}^{(2S)}/\Gamma^{(2S)} $$

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

0.137 ± 0.009 OUR FIT Error includes scale factor of 1.7.

0.147 ± 0.029 OUR AVERAGE Error includes scale factor of 4.6.

<table><thead><tr><th>0.158 ± 0.003 ± 0.006</th><th>4.8k</th><th>1 ABLIKIM</th><th>17N</th><th>BES3 ψ(2S) → γγ J/ψ</th></tr></thead></table>

<table><thead><tr><th>0.024 ± 0.015 ± 0.205</th><th>12k</th><th>ABLIKIM</th><th>17U</th><th>BES3 e⁺ e⁻ → γX</th></tr></thead></table>

<table><thead><tr><th>0.069 ± 0.018</th><th>2 OREGLIA</th><th>82</th><th>CBAL ψ(2S) → γχ₀</th></tr></thead></table>

<table><thead><tr><th>0.4 ± 0.3</th><th>3 BRANDELIK</th><th>79B</th><th>DASP ψ(2S) → γχ₀</th></tr></thead></table>

<table><thead><tr><th>0.16 ± 0.11</th><th>3 BARTEL</th><th>78B</th><th>CNTR e⁺ e⁻ → γX</th></tr></thead></table>

<table><thead><tr><th>3.3 ± 1.7</th><th>4 BIDDICK</th><th>77</th><th>CNTR e⁺ e⁻ → γX</th></tr></thead></table>

<table><thead><tr><th>0.151 ± 0.003 ± 0.010</th><th>4.3k</th><th>5 ABLIKIM</th><th>12O</th><th>BES3 ψ(2S) → γχ₀</th></tr></thead></table>

<table><thead><tr><th>0.125 ± 0.007 ± 0.013</th><th>560</th><th>6 MENDEZ</th><th>08</th><th>CLEO ψ(2S) → γχ₀</th></tr></thead></table>

<table><thead><tr><th>0.18 ± 0.01 ± 0.02</th><th>172</th><th>7 ADAM</th><th>05A</th><th>CLEO Repl. by MENDEZ 08</th></tr></thead></table>

¹Uses B(J/ψ → e⁺ e⁻) = (5.971 ± 0.032)% and B(J/ψ → μ⁺ μ⁻) = (5.961 ± 0.033)%.

²Recalculated by us using B(J/ψ(1S) → ℓ⁺ ℓ⁻) = 0.1181 ± 0.0020.

³Recalculated by us using B(J/ψ(1S) → μ⁺ μ⁻) = 0.0588 ± 0.0010.

⁴Assumes isotropic gamma distribution.

⁵Superseded by ABLIKIM 17N.

⁶Not independent from other measurements of MENDEZ 08.

⁷Not independent from other values reported by ADAM 05A.

$$ \Gamma(\chi_{c0}(1P) \rightarrow \gamma J/\psi(1S))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c0}(1P))/\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^{+} \pi^{-}) \qquad \Gamma_{94}/\Gamma \times \Gamma_{179}^{(2S)}/\Gamma^{(2S)} $$

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

0.396 ± 0.025 OUR FIT Error includes scale factor of 1.7.

<table><thead><tr><th>0.358 ± 0.020 ± 0.037</th><th>560</th><th>MENDEZ</th><th>08</th><th>CLEO ψ(2S) → γχ₀</th></tr></thead></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>0.55 ± 0.04 ± 0.06</th><th>172</th><th>1 ADAM</th><th>05A</th><th>CLEO Repl. by MENDEZ 08</th></tr></thead></table>

¹Not independent from other values reported by ADAM 05A.

$$ \Gamma(\chi_{c0}(1P) \rightarrow \gamma\gamma)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c0}(1P))/\Gamma_{\text{total}} \qquad \Gamma_{98}/\Gamma \times \Gamma_{179}^{(2S)}/\Gamma^{(2S)} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

².00 ± 0.09 OUR FIT

¹.95 ± 0.09 OUR AVERAGE

<table><thead><tr><th>1.93 ± 0.08 ± 0.05</th><th>3.5k</th><th>ABLIKIM</th><th>17AE</th><th>BES3 ψ(2S) → γχ₀ → 3γ</th></tr></thead></table>

<table><thead><tr><th>2.17 ± 0.32 ± 0.10</th><th>0.2k</th><th>ECKLUND</th><th>08A</th><th>BES3 ψ(2S) → γχ₀ → 3γ</th></tr></thead></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>2.17 ± 0.17 ± 0.12</th><th>0.8k</th><th>1 ABLIKIM</th><th>12A</th><th>BES3 ψ(2S) → γχ₀ → 3γ</th></tr></thead></table>

¹Superseded by ABLIKIM 17AE.
$$\Gamma(\chi_c(1P) \to \pi\pi)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma_{\text{total}}$$

$$\Gamma_{32}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**8.34±0.34 OUR FIT** Error includes scale factor of 1.2.

**8.80±0.17 OUR AVERAGE**

<table><thead><tr><th>9.11±0.08±0.65</th><th>17k</th><th>1 ABLIKIM</th><th>10A</th><th>BES3</th><th>e<sup>+</sup>e<sup>-</sup> → ψ(2S) → γχ<sub>C0</sub></th></tr></thead><tbody><tr><td>8.81±0.11±0.43</td><td>8.9k</td><td>2 ASNER</td><td>09</td><td>CLEO</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup></td></tr><tr><td>8.13±0.19±0.89</td><td>2.8k</td><td>3 ASNER</td><td>09</td><td>CLEO</td><td>ψ(2S) → γπ<sup>0</sup>π<sup>0</sup></td></tr></tbody></table>

¹Calculated by us. ABLIKIM 10A reports $B(\chi_{C0} \to \pi^0 \pi^0) = (3.23 \pm 0.03 \pm 0.23 \pm 0.14) \times 10^{-3}$ using $B(\psi(2S) \to \gamma \chi_{C0}) = (9.4 \pm 0.4)\%$. We have multiplied the $\pi^0 \pi^0$ measurement by 3 to obtain $\pi\pi$.

²Calculated by us. ASNER 09 reports $B(\chi_{C0} \to \pi^+ \pi^-) = (6.37 \pm 0.08 \pm 0.31 \pm 0.32) \times 10^{-3}$ using $B(\psi(2S) \to \gamma \chi_{C0}) = (9.22 \pm 0.11 \pm 0.46)\%$. We have multiplied the $\pi^+ \pi^-$ measurement by 3/2 to obtain $\pi\pi$.

³Calculated by us. ASNER 09 reports $B(\chi_{C0} \to \pi^0 \pi^0) = (2.94 \pm 0.07 \pm 0.32 \pm 0.15) \times 10^{-3}$ using $B(\psi(2S) \to \gamma \chi_{C0}) = (9.22 \pm 0.11 \pm 0.46)\%$. We have multiplied the $\pi^0 \pi^0$ measurement by 3 to obtain $\pi\pi$.

$$\Gamma(\chi_c(1P) \to \pi\pi)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{32}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**24.0±1.0 OUR FIT** Error includes scale factor of 1.2.

**20.7±1.7 OUR AVERAGE**

<table><thead><tr><th>23.9±2.7±4.1</th><th>97 ± 11</th><th>1 BAI</th><th>03C</th><th>BES</th><th>ψ(2S) → γχ<sub>C0</sub> → γπ<sup>0</sup>π<sup>0</sup></th></tr></thead><tbody><tr><td>20.2±1.1±1.5</td><td>720 ± 32</td><td>2 BAI</td><td>98i</td><td>BES</td><td>ψ(2S) → γχ<sub>C0</sub> → γπ<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

¹We have multiplied $\pi^0 \pi^0$ measurement by 3 to obtain $\pi\pi$.

²Calculated by us. The value for $B(\chi_{C0} \to \pi^+ \pi^-)$ reported in BAI 98i is derived using $B(\psi' \to \gamma \chi_{C0}) = (9.3 \pm 0.8)\%$ and $B(\psi' \to J/\psi \pi^+ \pi^-) = (32.4 \pm 2.6)\%$ [BAI 98D]. We have multiplied $\pi^+ \pi^-$ measurement by 3/2 to obtain $\pi\pi$.

$$\Gamma(\chi_c(1P) \to \eta\eta)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma_{\text{total}}$$

$$\Gamma_{36}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**2.94±0.22 OUR FIT** Error includes scale factor of 1.2.

**3.12±0.19 OUR AVERAGE**

<table><thead><tr><th>3.23±0.09±0.23</th><th>2132</th><th>1 ABLIKIM</th><th>10A</th><th>BES3</th><th>e<sup>+</sup>e<sup>-</sup> → ψ(2S) → γχ<sub>C0</sub></th></tr></thead><tbody><tr><td>2.93±0.12±0.29</td><td>0.9k</td><td>2 ASNER</td><td>09</td><td>CLEO</td><td>ψ(2S) → γηη</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

².86±0.46±0.37 48 ³ADAMS 07 CLEO ψ(2S) → γχ<sub>C0</sub>

¹Calculated by us. ABLIKIM 10A reports $B(\chi_{C0} \to \eta\eta) = (3.44 \pm 0.10 \pm 0.24 \pm 0.13) \times 10^{-3}$ using $B(\psi(2S) \to \gamma\chi_{C0}) = (9.4 \pm 0.4)\%$.

²Calculated by us. ASNER 09 reports $B(\chi_{C0} \to \eta\eta) = (3.18 \pm 0.13 \pm 0.31 \pm 0.16) \times 10^{-3}$ using $B(\psi(2S) \to \gamma\chi_{C0}) = (9.22 \pm 0.11 \pm 0.46)\%$.

³Superseded by ASNER 09. Calculated by us. The value of $B(\chi_{C0}(1P) \to \eta\eta)$ reported by ADAMS 07 was derived using $B(\psi(2S) \to \gamma\chi_{C0}(1P)) = (9.22 \pm 0.11 \pm 0.46)\%$ (ATHAR 04).

$$\Gamma(\chi_c(1P) \to \eta\eta)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{36}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**0.85 ±0.06 OUR FIT** Error includes scale factor of 1.2.

**0.578±0.241±0.158** BAI 03C BES ψ(2S) → γηη

$$\Gamma(\chi_c(1P) \to K^+K^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma_{\text{total}} \quad \Gamma_{42}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**5.93±0.28 OUR FIT**

**5.97±0.07±0.32** 8.1k 1 ASNER 09 CLEO ψ(2S) → K<sup>+</sup>K<sup>-</sup>

¹Calculated by us. ASNER 09 reports $B(\chi_{C0} \to K^+ K^-) = (6.47 \pm 0.08 \pm 0.35 \pm 0.32) \times 10^{-3}$ using $B(\psi(2S) \to \gamma \chi_{C0}) = (9.22 \pm 0.11 \pm 0.46)\%$.

$$\Gamma(\chi_c(1P) \to K^+K^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{42}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**1.71±0.08 OUR FIT**

**1.63±0.10±0.15** 774 ± 38 1 BAI 98i BES ψ(2S) → K<sup>+</sup>K<sup>-</sup>

¹Calculated by us. The value for $B(\chi_{C0} \to K^+ K^-)$ reported by BAI 98i is derived using $B(\psi(2S) \to \gamma \chi_{C0}) = (9.3 \pm 0.8)\%$ and $B(\psi(2S) \to J/\psi \pi^+ \pi^-) = (32.4 \pm 2.6)\%$ [BAI 98D].

$$\Gamma(\chi_c(1P) \to K^0_S K^0_S)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma_{\text{total}} \quad \Gamma_{43}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**3.10±0.16 OUR FIT**

**3.18±0.17 OUR AVERAGE**

<table><thead><tr><th>3.22±0.07±0.17</th><th>2.1k</th><th>1 ASNER</th><th>09</th><th>CLEO</th><th>ψ(2S) → γK<sup>0</sup><sub>S</sub>K<sup>0</sup><sub>S</sub></th></tr></thead><tbody><tr><td>3.02±0.19±0.33</td><td>322</td><td>2 ABLIKIM</td><td>05o</td><td>BES2</td><td>ψ(2S) → γK<sup>0</sup><sub>S</sub>K<sup>0</sup><sub>S</sub></td></tr></tbody></table>

¹Calculated by us. ASNER 09 reports $B(\chi_{C0} \to K^0_S K^0_S) = (3.49 \pm 0.08 \pm 0.18 \pm 0.17) \times 10^{-3}$ using $B(\psi(2S) \to \gamma \chi_{C0}) = (9.22 \pm 0.11 \pm 0.46)\%$.

$$\Gamma(\chi_c(1P) \to K^0_S K^0_S)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{43}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**8.9±0.5 OUR FIT**

**5.6±0.8±1.3** 1 BAI 99B BES ψ(2S) → γK<sup>0</sup><sub>S</sub>K<sup>0</sup><sub>S</sub>

¹Calculated by us. The value of $B(\chi_{C0} \to K^0_S K^0_S)$ reported by BAI 99B was derived using $B(\psi(2S) \to \gamma \chi_{C0}(1P)) = (9.3 \pm 0.8)\%$ and $B(\psi(2S) \to J/\psi \pi^+ \pi^-) = (32.4 \pm 2.6)\%$ [BAI 98D].

$$\Gamma(\chi_c(1P) \to 2(\pi^+\pi^-))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{1}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**6.6±1.0 OUR FIT** Error includes scale factor of 2.0.

**6.9±2.4 OUR AVERAGE** Error includes scale factor of 3.8.

**4.4±0.1±0.9** 1 BAI 99B BES ψ(2S) → γχ<sub>C0</sub>

**9.3±0.9** 2 TANENBAUM 78 MRK1 ψ(2S) → γχ<sub>C0</sub>

¹Calculated by us. The value for $B(\chi_{C0} \to 2\pi^+ 2\pi^-)$ reported in BAI 99B is derived using $B(\psi(2S) \to \gamma \chi_{C0}) = (9.3 \pm 0.8)\%$ and $B(\psi(2S) \to J/\psi(1S) \pi^+ \pi^-) = (32.4 \pm 2.6)\%$ [BAI 98D].

²The value $B(\psi(1S) \to \gamma \chi_{C0}) \times B(\chi_{C0} \to 2\pi^+ 2\pi^-)$ reported in TANENBAUM 78 is derived using $B(\psi(2S) \to J/\psi(1S) \pi^+ \pi^-) \times B(J/\psi(1S) \to \ell^+ \ell^-) = (4.6 \pm 0.7)\%$. Calculated by us using $B(J/\psi(1S) \to \ell^+ \ell^-) = 0.1181 \pm 0.0020$.

$$\Gamma(\chi_c(1P) \to \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma_{\text{total}} \quad \Gamma_{8}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**1.78±0.15 OUR FIT** Error includes scale factor of 1.1.

**1.64±0.05±0.2** ABLIKIM 05Q BES2 ψ(2S) → γχ<sub>C0</sub>

$$\Gamma(\chi_c(1P) \to \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{8}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**5.1 ±0.4 OUR FIT** Error includes scale factor of 1.1.

**5.8 ±1.6 OUR AVERAGE** Error includes scale factor of 2.3.

**4.22±0.20±0.97** BAI 99B BES ψ(2S) → γχ<sub>C0</sub>

**7.4 ±1.0** 1 TANENBAUM 78 MRK1 ψ(2S) → γχ<sub>C0</sub>

¹The reported value is derived using $B(\psi(2S) \to \pi^+\pi^- J/\psi) \times B(J/\psi \to \ell^+ \ell^-) = (4.6 \pm 0.7)\%$. Calculated by us using $B(J/\psi \to \ell^+ \ell^-) = 0.1181 \pm 0.0020$.

$$\Gamma(\chi_c(1P) \to K^+K^- K^+K^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma_{\text{total}} \quad \Gamma_{51}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**2.8 ±0.4 OUR FIT** Error includes scale factor of 1.5.

**3.20±0.11±0.41** 278 1 ABLIKIM 06T BES2 ψ(2S) → γK<sup>+</sup>2K<sup>-</sup>

¹Calculated by us. The value of $B(\chi_{C0} \to 2K^+ 2K^-)$ reported by ABLIKIM 06T was derived using $B(\psi(2S) \to \gamma \chi_{C0}(1P)) = (9.2 \pm 0.4)\%$.

$$\Gamma(\chi_c(1P) \to K^+K^- K^+K^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{51}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**8.0±1.2 OUR FIT** Error includes scale factor of 1.5.

**6.1±0.8±0.9** 1 BAI 99B BES ψ(2S) → γ2K<sup>+</sup>2K<sup>-</sup>

¹Calculated by us. The value of $B(\chi_{C0} \to 2K^+ 2K^-)$ reported by BAI 99B was derived using $B(\psi(2S) \to \gamma \chi_{C0}(1P)) = (9.3 \pm 0.8)\%$ and $B(\psi(2S) \to J/\psi \pi^+ \pi^-) = (32.4 \pm 2.6)\%$ [BAI 98D].

$$\Gamma(\chi_c(1P) \to \phi\phi)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma_{\text{total}} \quad \Gamma_{56}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**0.829±0.034 OUR FIT**

**0.78 ±0.06 OUR AVERAGE**

**0.77 ±0.03 ±0.08** 612 1 ABLIKIM 11K BES3 ψ(2S) → γ hadrons

**0.86 ±0.19 ±0.12** 26 2 ABLIKIM 06T BES2 ψ(2S) → γ2K<sup>+</sup>2K<sup>-</sup>

¹Calculated by us. The value of $B(\chi_{C0} \to \phi\phi)$ reported by ABLIKIM 11K was derived using $B(\psi(2S) \to \gamma \chi_{C0}(1P)) = (9.62 \pm 0.31)\%$.

²Calculated by us. The value of $B(\chi_{C0} \to \phi\phi)$ reported by ABLIKIM 06T was derived using $B(\psi(2S) \to \gamma \chi_{C0}(1P)) = (9.2 \pm 0.4)\%$.

$$\Gamma(\chi_c(1P) \to \phi\phi)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\chi_c(1P))/\Gamma(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{56}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}$$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

**2.39±0.10 OUR FIT**

**2.6 ±1.0 ±1.1** 1 BAI 99B BES ψ(2S) → γ2K<sup>+</sup>2K<sup>-</sup>

¹Calculated by us. The value of $B(\chi_{C0} \to \phi\phi)$ reported by BAI 99B was derived using $B(\psi(2S) \to \gamma \chi_{C0}(1P)) = (9.3 \pm 0.8)\%$ and $B(\psi(2S) \to J/\psi \pi^+ \pi^-) = (32.4 \pm 2.6)\%$ [BAI 98D].
$$ \frac{\Gamma(\chi_{c0}(1P) \rightarrow \Sigma^{+} \bar{p} K_{S}^{0} + \text{c.c.})}{\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c0}(1P))} = \frac{\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c0}(1P))}{\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c0}(1P))} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.45&plusmn;0.17&plusmn;0.19</td><td>493</td><td>1 ABLIKIM</td><td>19BB BES3</td><td>&psi;(2S) &rarr; &gamma; &Sigma;<sup>+</sup> &bar;p K<sub>S</sub><sup>0</sup> + c.c.</td></tr></tbody></table>

¹Calculated by us. ABLIKIM 19BB reports $B(\chi_c^0 \rightarrow \Sigma^+ \bar{p} K_S^0 + \text{c.c.}) = (3.52 \pm 0.19 \pm 0.21) \times 10^{-4}$ using $B(\psi(2S) \rightarrow \gamma \chi_c^0) = (9.79 \pm 0.20)\%$ and other branching fractions from PDG 18.

$$ \frac{\Gamma(\chi_{c0}(1P) \rightarrow \Sigma^0 \bar{p} K^+ + \text{c.c.})}{\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c0}(1P))} = \frac{\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c0}(1P))}{\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c0}(1P))} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.97&plusmn;0.12&plusmn;0.14</td><td>871</td><td>1 ABLIKIM</td><td>20AE BES3</td><td>&psi;(2S) &rarr; &gamma; &Sigma;<sup>0</sup> &bar;p K<sup>+</sup> + c.c.</td></tr></tbody></table>

¹Calculated by us. ABLIKIM 20AE reports $B(\chi_c^0 \rightarrow \Sigma^0 \bar{p} K^+ + \text{c.c.}) = (3.03 \pm 0.12 \pm 0.15) \times 10^{-4}$ using $B(\psi(2S) \rightarrow \gamma \chi_c^0) = (9.79 \pm 0.20)\%$ and other branching fractions from PDG 20.

## $\chi_{c0}(1P)$ REFERENCES

<table><tbody><tr><td>ABLIKIM</td><td>23N</td><td>JHEP</td><td>2305 069</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>23T</td><td>PR D107 092004</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22AO</td><td>PR D106 072004</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22O</td><td>JHEP</td><td>2206 074</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22Q</td><td>PR D106 032014</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>PDG</td><td>22P</td><td>PTEP</td><td>2022 083C01</td><td>R.L. Workman et al.</td><td>(PDG Collab.)</td></tr><tr><td>ABLIKIM</td><td>21AV</td><td>JHEP</td><td>2111 217</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>21L</td><td>PR D103 112004</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>20AE</td><td>PR D102 092006</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>20B</td><td>PR D101 012012</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>20L</td><td>PR D101 092002</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>PDG</td><td>20P</td><td>PTEP</td><td>2020 083C01</td><td>P.A. Zyla et al.</td><td>(PDG Collab.)</td></tr><tr><td>ABLIKIM</td><td>19AA</td><td>PR D99 052008</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19AU</td><td>PR D100 052010</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19BB</td><td>PR D100 092006</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19Z</td><td>PR D99 012015</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19Z</td><td>PR D99 051101</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>18V</td><td>PR D97 052011</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>PDG</td><td>18P</td><td>PR D98 030001</td><td></td><td>M. Tanabashi et al.</td><td>(PDG Collab.)</td></tr><tr><td>AAIJ</td><td>17BB</td><td>EPJ</td><td>C77 609</td><td>R. Aaij et al.</td><td>(LHCb Collab.)</td></tr><tr><td>ABLIKIM</td><td>17AE</td><td>PR D96 092007</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17A1</td><td>PR D96 112006</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17I</td><td>PRL</td><td>118 221802</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17N</td><td>PR D95 072004</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17U</td><td>PR D96 032001</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>PDG</td><td>16C</td><td>CP</td><td>C40 100001</td><td>C. Patrignani et al.</td><td>(PDG Collab.)</td></tr><tr><td>ABLIKIM</td><td>15I</td><td>PR D91 092006</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>15M</td><td>PR D91 112008</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>15N</td><td>PR D91 112018</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13B</td><td>PR D87 012002</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13D</td><td>PR D87 012007</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13H</td><td>PR D87 032007</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13V</td><td>PR D88 112001</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>UEHARA</td><td>13W</td><td>PTEP</td><td>2013 123C01</td><td>S. Uehara et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>12A</td><td>PR D85 112008</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12I</td><td>PR D86 052004</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12D</td><td>PR D86 052011</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12Z</td><td>PR D109 172002</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>LIU</td><td>12B</td><td>PRL</td><td>108 232001</td><td>Z.Q. Liu et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>11A</td><td>PR D83 012006</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11E</td><td>PR D83 112005</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11F</td><td>PR D83 112009</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>107</td><td>PR D84 010001</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>DEL-AMO-SA...</td><td>11M</td><td>P. del Amo Sanchez et al.</td><td>BABAR Collab.</td><td>P. del Amo Sanchez et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>10A</td><td>PR D81 052005</td><td></td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ONYISI</td><td>10A</td><td>P.U.E. Onyisi et al.</td><td>CLEO Collab.</td><td>S. Uehara et al.</td><td>(BESIII Collab.)</td></tr><tr><td>UEHARA</td><td>10A</td><td>PR D82 114031</td><td></td><td>D.M. Asner et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ASNER</td><td>09C</td><td>PR D67 032007</td><td></td><td>S. Uehara et al.</td><td>(BESIII Collab.)</td></tr><tr><td>UEHARA</td><td>09C</td><td>PR D79 052006</td><td></td><td>S. Uehara et al.</td><td>(BESIII Collab.)</td></tr><tr><td>BENNETT</td><td>08A</td><td>PRL</td><td>101 158101</td><td>J.V. Bennett et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ECKLUND</td><td>08A</td><td>PR D78 091501</td><td></td><td>K.M. Ecklund et al.</td><td>(CLEO Collab.)</td></tr><tr><td>HE</td><td>08B</td><td>PR D78 092004</td><td></td><td>Q. He et al.</td><td>(CLEO Collab.)</td></tr><tr><td>MENDEZ</td><td>08C</td><td>PR D78 011102</td><td></td><td>H. Mendez et al.</td><td>(CLEO Collab.)</td></tr><tr><td>NAIK</td><td>08D</td><td>PR D78 031101</td><td></td><td>P. Naik et al.</td><td>(CLEO Collab.)</td></tr><tr><td>UEHARA</td><td>08E</td><td>EPJ</td><td>C53 1</td><td>S. Uehara et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABE</td><td>08F</td><td>PRL</td><td>98 082001</td><td>K. Abe et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ADAMS</td><td>07E</td><td>PR D75 071101</td><td></td><td>G.S. Adams et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ATHAR</td><td>07D</td><td>PR D76 032002</td><td></td><td>S.B. Athar et al.</td><td>(CLEO Collab.)</td></tr><tr><td>CHEN</td><td>07B</td><td>PR D651 15</td><td></td><td>W.T. Chen et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>06D</td><td>PR D73 052006</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06I</td><td>PR D74 012004</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06R</td><td>PR D74 072001</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06T</td><td>PL B642 197</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05G</td><td>PR D71 092002</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05N</td><td>PL B630 7</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05O</td><td>PL B630 21</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05Q</td><td>PR D72 092002</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ADAM</td><td>05A</td><td>PRL</td><td>94 232002</td><td>N.E. Adam et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ANDREOTTI</td><td>05A</td><td>NP B717 34</td><td></td><td>M. Andreotti et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>ANDREOTTI</td><td>05B</td><td>PR D72 112002</td><td></td><td>M. Andreotti et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>NAKAZAWA</td><td>05C</td><td>PL B615 39</td><td></td><td>H. Nakazawa et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABE</td><td>04G</td><td>PR D70 071102</td><td></td><td>K. Abe et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>04G</td><td>PR D70 092002</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>04H</td><td>PR D70 092003</td><td></td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ANDREOTTI</td><td>04J</td><td>PR D84 16</td><td></td><td>M. Andreotti et al.</td><td>(E835 Collab.)</td></tr><tr><td>ATHAR</td><td>04K</td><td>PR D70 112002</td><td></td><td>S.B. Athar et al.</td><td>(CLEO Collab.)</td></tr><tr><td>BAI</td><td>04F</td><td>PR D69 092001</td><td></td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>ANDREOTTI</td><td>03</td><td>PRL</td><td>91 091801</td><td>M. Andreotti et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>AULCHENKO</td><td>03C</td><td>PL B573 63</td><td></td><td>V.M. Aukhenko et al.</td><td>(KEDR Collab.)</td></tr><tr><td>BAI</td><td>03E</td><td>PR D67 032004</td><td></td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>03E</td><td>PR D67 112001</td><td></td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>ABE,K</td><td>02C</td><td>PRL</td><td>89 142001</td><td>K. Abe et al.</td><td>(BELLE Collab.)</td></tr><tr><td>BAGNASCO</td><td>02E</td><td>PL B533 237</td><td></td><td>S. Bagnasco et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>EISENSTEIN</td><td>01C</td><td>PRL</td><td>87 061801</td><td>B.I. Eisenstein et al.</td><td>(CLEO Collab.)</td></tr><tr><td>AMBROGIANI</td><td>00B</td><td>PR D62 052002</td><td></td><td>M. Ambrogiani et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>AMBROGIANI</td><td>00B</td><td>PR B3 2902</td><td></td><td>M. Ambrogiani et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>BAI</td><td>99B</td><td>PR D60 072001</td><td></td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>98D</td><td>PR D58 092006</td><td></td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>98I</td><td>PRL</td><td>81 3091</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>GAISER</td><td>86E</td><td>PR D34 711</td><td></td><td>J. Gaiser et al.</td><td>(Crystal Ball Collab.)</td></tr><tr><td>LEE</td><td>85E</td><td>SLAC 282</td><td></td><td>R.A. Lee</td><td>(SLAC)</td></tr></tbody></table>

<table><tr><td>OREGLIA</td><td>82</td><td>PR</td><td>D25 2259</td><td></td></tr><tr><td>BRANDELIK</td><td>79B</td><td>NP</td><td>B160 426</td><td></td></tr><tr><td>BARTEL</td><td>78B</td><td>PL</td><td>79B 492</td><td></td></tr><tr><td>TANENBAUM</td><td>78</td><td>PR</td><td>D17 1731</td><td></td></tr><tr><td>Also</td><td></td><td>Private Comm.</td><td></td><td></td></tr><tr><td>BIDDICK</td><td>77</td><td>PRL</td><td>38 1324</td><td></td></tr></table>

<table><tr><td>M.J. Oreglia et al.</td><td>(SLAC, CIT, HARV+)</td></tr><tr><td>R. Brandelik et al.</td><td>(DASP Collab.)</td></tr><tr><td>W. Bartel et al.</td><td>(DESY, HEIDP)</td></tr><tr><td>W.M. Tanenbaum et al.</td><td>(SLAC, LBL)</td></tr><tr><td>G. Trilling</td><td>(LBL, UCB)</td></tr><tr><td>C.J. Biddick et al.</td><td>(UCSD, UMD, PAVI+)</td></tr></table>

$$ \chi_{c1}(1P) $$

$$ I^G(JPC) = 0^{+}(1^{++}) $$

See the Review on "Branching Ratios of $\psi(2S)$, $\chi_{c0,1,2}$ and $\eta_c(1S)$" before the $\chi_{c0}(1P)$ Listings.

## $\chi_{c1}(1P)$ MASS

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3510.67 ± 0.05</td><td>OUR AVERAGE</td><td></td><td></td><td></td></tr><tr><td>3509.84 ± 0.69 ± 0.64</td><td>2.8k</td><td>AAIJ</td><td>23AH LHCB</td><td>B<sup>+→</sup> K<sup>+</sup>(K<sub>S</sub><sup>0</sup> Kπ)</td></tr><tr><td>3508.4 ± 1.9 ± 0.7</td><td>460</td><td>1 AAIJ</td><td>17BB LHCB</td><td>p p → b b X → 2(K<sup>+</sup> K<sup>-</sup>) X</td></tr><tr><td>3510.71 ± 0.04 ± 0.09</td><td>4.8k</td><td>2 AAIJ</td><td>17BI LHCB</td><td>χ<sub>c1</sub> → J/ψμ<sup>+</sup> μ<sup>-</sup></td></tr><tr><td>3510.30 ± 0.14 ± 0.16</td><td></td><td>ABLIKIM</td><td>05G BES2</td><td>ψ(2S) → γχ<sub>c1</sub></td></tr><tr><td>3510.719 ± 0.051 ± 0.019</td><td></td><td>ANDREOTTI</td><td>05A E835</td><td>p p → e<sup>+</sup> e<sup>-</sup> γ</td></tr><tr><td>3509.4 ± 0.9</td><td></td><td>BAI</td><td>99B BES</td><td>ψ(2S) → γX</td></tr><tr><td>3510.60 ± 0.087 ± 0.019</td><td>513</td><td>3 ARMSTRONG</td><td>92 E760</td><td>p p → e<sup>+</sup> e<sup>-</sup> γ</td></tr><tr><td>3511.3 ± 0.4 ± 0.4</td><td>30</td><td>BAGLIN</td><td>86B SPEC</td><td>p p → e<sup>+</sup> e<sup>-</sup> X</td></tr><tr><td>3512.3 ± 0.3 ± 4.0</td><td></td><td>4 GAISER</td><td>86 CBAL</td><td>ψ(2S) → γX</td></tr><tr><td>3507.4 ± 1.7</td><td>91</td><td>5 LEMOIGNE</td><td>82 GOLI</td><td>185 π<sup>-</sup> Be → γμ<sup>+</sup> μ<sup>-</sup> A</td></tr><tr><td>3504.0 ± 0.6</td><td></td><td>OREGLIA</td><td>82 CBAL</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ2γ</td></tr><tr><td>3501.0 ± 1.1</td><td>254</td><td>6 HIMEL</td><td>80 MRK2</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ2γ</td></tr><tr><td>3509 ± 11</td><td>21</td><td>BRANDELIK</td><td>79B DASP</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ2γ</td></tr><tr><td>3507 ± 3</td><td></td><td>6 BARTEL</td><td>78B CNTR</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ2γ</td></tr><tr><td>3505.0 ± 4 ± 4</td><td></td><td>6.7 TANENBAUM</td><td>78 MRK1</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>3513 ± 7</td><td>367</td><td>6 BIDDICK</td><td>77 CNTR</td><td>ψ(2S) → γX</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

3500 ± 10 40 TANENBAUM 75 MRK1 Hadrons γ

¹From a $\phi\phi$ invariant mass with the width of $\chi_{c1}(1P)$ fixed to the PDG 16 value.

²AAIJ 17BI reports also $m(\chi_{c2}) - m(\chi_{c1}) = 45.39 \pm 0.07 \pm 0.03$ MeV.

³Recalculated by ANDREOTTI 05A, using the value of $\psi(2S)$ mass from AULCHENKO 03.

⁴Using mass of $\psi(2S) = 3686.0$ MeV.

⁵$J/\psi(15)$ mass constrained to 3097 MeV.

⁶Mass value shifted by us by amount appropriate for $\psi(2S)$ mass = 3686 MeV and $J/\psi(15)$ mass = 3097 MeV.

⁷From a simultaneous fit to radiative and hadronic decay channels.

## $\chi_{c1}(1P)$ WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.84 ± 0.04</td><td>OUR FIT</td><td></td><td></td><td></td><td>Error includes scale factor of 1.1.</td></tr><tr><td>0.88 ± 0.05</td><td>OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>1.39 ± 0.40</td><td>+0.26</td><td></td><td></td><td></td><td></td></tr><tr><td>-0.38</td><td>-0.77</td><td></td><td></td><td></td><td></td></tr><tr><td>0.876 ± 0.045</td><td>± 0.026</td><td></td><td></td><td></td><td></td></tr><tr><td>0.87 ± 0.11</td><td>± 0.08</td><td>513</td><td>1 ARMSTRONG</td><td>92 E760</td><td>p p → e<sup>+</sup> e<sup>-</sup> γ</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<1.39 ± 0.40 95 BAGLIN 86B SPEC p p → e<sup>+</sup> e<sup>-</sup> X

<3.8 ± 0.10 90 GAISER 86 CBAL ψ(2S) → γX

¹Recalculated by ANDREOTTI 05A.

## $\chi_{c1}(1P)$ DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>f</sub>/Γ)</th><th>Scale factor/ Confidence level</th></tr></thead><tbody><tr><td>Γ<sub>1</sub></td><td>hadrons</td><td></td></tr><tr><td>Γ<sub>2</sub></td><td>e<sup>+</sup> e<sup>-</sup></td><td>( 1.4 &plusmn;1.5 &minus;1.0 ) &times; 10<sup>-7</sup></td></tr><tr><td>Γ<sub>3</sub></td><td>3(π<sup>+</sup> π<sup>-</sup>)</td><td>S=4.6</td></tr><tr><td>Γ<sub>4</sub></td><td>2(π<sup>+</sup> π<sup>-</sup>)</td><td>( 7.6 &plusmn;2.6 ) &times; 10<sup>-3</sup></td></tr><tr><td>Γ<sub>5</sub></td><td>π<sup>+</sup> π<sup>-</sup> π<sup>0</sup> π<sup>0</sup></td><td>( 1.19 &plusmn;0.15 ) %</td></tr><tr><td>Γ<sub>6</sub></td><td>ρ<sup>+</sup> π<sup>-</sup> π<sup>0</sup> + c.c.</td><td>( 1.45 &plusmn;0.24 ) %</td></tr><tr><td>Γ<sub>7</sub></td><td>ρ<sup>0</sup> π<sup>+</sup> π<sup>-</sup></td><td>( 3.9 &plusmn;3.5 ) &times; 10<sup>-3</sup></td></tr><tr><td>Γ<sub>8</sub></td><td>4π<sup>0</sup></td><td>( 5.4 &plusmn;0.8 ) &times; 10<sup>-4</sup></td></tr><tr><td>Γ<sub>9</sub></td><td>π<sup>+</sup> π<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td><td>( 4.5 &plusmn;1.0 ) &times; 10<sup>-3</sup></td></tr><tr><td>Γ<sub>10</sub></td><td>K<sup>+</sup> K<sup>-</sup> π<sup>0</sup> π<sup>0</sup></td><td>( 1.12 &plusmn;0.27 ) &times; 10<sup>-3</sup></td></tr><tr><td>Γ<sub>11</sub></td><td>K<sup>+</sup> K<sup>-</sup> π<sup>+</sup> π<sup>-</sup> π<sup>0</sup></td><td>( 1.15 &plusmn;0.13 ) %</td></tr><tr><td>Γ<sub>12</sub></td><td>K<sup>0</sup> K<sup>+</sup> K<sup>-</sup> π<sup>+</sup> π<sup>-</sup> π<sup>0</sup></td><td>( 7.5 &plusmn;0.8 ) &times; 10<sup>-3</sup></td></tr><tr><td>Γ<sub>13</sub></td><td>K<sup>+</sup> π<sup>-</sup> K<sup>0</sup> π<sup>0</sup> + c.c.</td><td>( 8.6 &plusmn;1.4 ) &times; 10<sup>-3</sup></td></tr><tr><td>Γ<sub>14</sub></td><td>ρ<sup>-</sup> K<sup>+</sup> K<sup>0</sup> + c.c.</td><td>( 5.0 &plusmn;1.2 ) &times; 10<sup>-3</sup></td></tr><tr><td>Γ<sub>15</sub></td><td>K<sup>*</sup>(892)<sup>0</sup> K<sup>0</sup> π<sup>0</sup> → K<sup>+</sup> K<sup>-</sup> K<sup>0</sup> π<sup>0</sup> + c.c.</td><td>( 2.3 &plusmn;0.6 ) &times; 10<sup>-3</sup></td></tr></tbody></table>
# Meson Particle Listings

## $\chi_{c1}(1P)$

<table><tbody><tr><td>Γ<sub>16</sub></td><td>K<sup>+</sup>K<sup>-</sup>ηπ<sup>0</sup></td><td>(1.12±0.34) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>17</sub></td><td>π<sup>+</sup>π<sup>-</sup>K<sub>S</sub><sup>0</sup>K<sub>S</sub><sup>0</sup></td><td>(6.9 ± 2.9) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>18</sub></td><td>K<sup>+</sup>K<sup>-</sup>η</td><td>(3.2 ± 1.0) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>19</sub></td><td>K<sup>0</sup>K<sup>+</sup>π<sup>-</sup> + c.c.</td><td>(7.0 ± 0.6) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>20</sub></td><td>K<sup>*</sup>(892)<sup>0</sup>K<sup>0</sup> + c.c.</td><td>(1.03±0.15) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>21</sub></td><td>K<sup>*</sup>(892)<sup>+</sup>K<sup>-</sup> + c.c.</td><td>(1.21±0.23) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>22</sub></td><td>K<sub>S</sub><sup>0</sup>(1430)<sup>0</sup>K<sup>0</sup> + c.c. → K<sub>S</sub><sup>0</sup>K<sup>+</sup>π<sup>-</sup> + c.c.</td><td>&lt; 8 × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>23</sub></td><td>K<sub>S</sub><sup>0</sup>(1430)<sup>+</sup>K<sup>-</sup> + c.c. → K<sub>S</sub><sup>0</sup>K<sup>+</sup>π<sup>-</sup> + c.c.</td><td>&lt; 2.1 × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>24</sub></td><td>K<sup>+</sup>K<sup>-</sup>π<sup>0</sup></td><td>(1.81±0.24) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>25</sub></td><td>ηπ<sup>+</sup>π<sup>-</sup></td><td>(4.62±0.24) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>26</sub></td><td>a<sub>0</sub>(980)<sup>+</sup>π<sup>-</sup> + c.c. → ηπ<sup>+</sup>π<sup>-</sup></td><td>(3.2 ± 0.4) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>27</sub></td><td>a<sub>2</sub>(1320)<sup>+</sup>π<sup>-</sup> + c.c. → ηπ<sup>+</sup>π<sup>-</sup></td><td>(1.76±0.24) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>28</sub></td><td>a<sub>2</sub>(1700)<sup>+</sup>π<sup>-</sup> + c.c. → ηπ<sup>+</sup>π<sup>-</sup></td><td>(4.6 ± 0.7) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>29</sub></td><td>f<sub>2</sub>(1270)η → ηπ<sup>+</sup>π<sup>-</sup></td><td>(3.5 ± 0.6) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>30</sub></td><td>f<sub>4</sub>(2050)η → ηπ<sup>+</sup>π<sup>-</sup></td><td>(2.5 ± 0.9) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>31</sub></td><td>π<sub>1</sub>(1400)<sup>+</sup>π<sup>-</sup> + c.c. → ηπ<sup>+</sup>π<sup>-</sup></td><td>&lt; 5 × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>32</sub></td><td>π<sub>1</sub>(1600)<sup>+</sup>π<sup>-</sup> + c.c. → ηπ<sup>+</sup>π<sup>-</sup></td><td>&lt; 1.5 × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>33</sub></td><td>π<sub>1</sub>(2015)<sup>+</sup>π<sup>-</sup> + c.c. → ηπ<sup>+</sup>π<sup>-</sup></td><td>&lt; 8 × 10<sup>-6</sup></td></tr><tr><td>Γ<sub>34</sub></td><td>f<sub>2</sub>(1270)η</td><td>(6.7 ± 1.1) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>35</sub></td><td>π<sup>+</sup>π<sup>-</sup>η'</td><td>(2.2 ± 0.4) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>36</sub></td><td>K<sup>+</sup>K<sup>-</sup>η'(958)</td><td>(8.8 ± 0.9) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>37</sub></td><td>K<sub>S</sub><sup>0</sup>(1430)<sup>+</sup>K<sup>-</sup> + c.c.</td><td>(6.4<sup>+2.2</sup><sub>-2.6</sub>) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>38</sub></td><td>f<sub>0</sub>(980)η'(958)</td><td>(1.6<sup>+1.4</sup><sub>-0.7</sub>) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>39</sub></td><td>f<sub>0</sub>(1710)η'(958)</td><td>(7<sup>+7</sup><sub>-5</sub>) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>40</sub></td><td>f'<sub>2</sub>(1525)η'(958)</td><td>(9 ± 6) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>41</sub></td><td>K<sub>S</sub><sup>2</sup>(1430)<sup>+</sup>K<sup>-</sup> + c.c.</td><td>(1.61±0.31) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>42</sub></td><td>K<sub>S</sub><sup>2</sup>(1430)K<sup>0</sup> + c.c.</td><td>(1.17±0.20) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>43</sub></td><td>π<sup>0</sup>f<sub>0</sub>(980) → π<sup>0</sup>π<sup>+</sup>π<sup>-</sup></td><td>(3.5 ± 0.9) × 10<sup>-7</sup></td></tr><tr><td>Γ<sub>44</sub></td><td>K<sup>+</sup>K<sup>*</sup>(892)<sup>0</sup>π<sup>-</sup> + c.c.</td><td>(3.2 ± 2.1) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>45</sub></td><td>K<sup>*</sup>(892)<sup>0</sup>K<sup>*</sup>(892)<sup>0</sup></td><td>(1.4 ± 0.4) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>46</sub></td><td>K<sup>+</sup>K<sup>-</sup>K<sub>S</sub><sup>0</sup>K<sub>S</sub><sup>0</sup></td><td>&lt; 4 × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>47</sub></td><td>K<sub>S</sub><sup>0</sup>K<sub>S</sub><sup>0</sup>K<sub>S</sub><sup>0</sup>K<sub>S</sub><sup>0</sup></td><td>(3.5 ± 1.0) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>48</sub></td><td>K<sup>+</sup>K<sup>-</sup>K<sup>+</sup>K<sup>-</sup></td><td>(5.4 ± 1.1) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>49</sub></td><td>K<sup>+</sup>K<sup>-</sup>φ</td><td>(4.1 ± 1.5) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>50</sub></td><td>K<sup>0</sup>K<sup>+</sup>π<sup>-</sup> + c.c.</td><td>(3.3 ± 0.5) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>51</sub></td><td>K<sup>+</sup>K<sup>-</sup>π<sup>0</sup>φ</td><td>(1.62±0.30) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>52</sub></td><td>φπ<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td>(7.5 ± 1.0) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>53</sub></td><td>ωω</td><td>(5.7 ± 0.7) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>54</sub></td><td>ωK<sup>+</sup>K<sup>-</sup></td><td>(7.8 ± 0.9) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>55</sub></td><td>ωφ</td><td>(2.7 ± 0.4) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>56</sub></td><td>φφ</td><td>(4.26±0.21) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>57</sub></td><td>φφη</td><td>(3.0 ± 0.5) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>58</sub></td><td>pρ</td><td>(7.6 ± 0.4) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>59</sub></td><td>pρπ<sup>0</sup></td><td>(1.55±0.18) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>60</sub></td><td>pρη</td><td>(1.45±0.25) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>61</sub></td><td>pρπ<sup>0</sup>η</td><td>(2.12±0.31) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>62</sub></td><td>pρπ<sup>0</sup>φ</td><td>&lt; 1.7 × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>63</sub></td><td>pρπ<sup>+</sup>π<sup>-</sup></td><td>(5.0 ± 1.9) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>64</sub></td><td>pρπ<sup>0</sup>π<sup>0</sup></td><td>&lt; 5 × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>65</sub></td><td>pρK<sup>+</sup>K<sup>-</sup>(non-resonant)</td><td>(1.27±0.22) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>66</sub></td><td>pρK<sup>0</sup>K<sup>0</sup>S<sup>0</sup>S<sup>0</sup></td><td>&lt; 4.5 × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>67</sub></td><td>pππ<sup>-</sup></td><td>(3.8 ± 0.5) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>68</sub></td><td>pππ<sup>0</sup>π<sup>+</sup></td><td>(3.9 ± 0.5) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>69</sub></td><td>pππ<sup>-</sup>π<sup>0</sup></td><td>(1.03±0.12) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>70</sub></td><td>pππ<sup>+</sup>π<sup>0</sup></td><td>(1.01±0.12) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>71</sub></td><td>ΛΛ</td><td>(1.27±0.09) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>72</sub></td><td>ΛΛπ<sup>+</sup>π<sup>-</sup></td><td>(2.9 ± 0.5) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>73</sub></td><td>ΛΛπ<sup>+</sup>π<sup>-</sup>(non-resonant)</td><td>(2.5 ± 0.6) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>74</sub></td><td>Σ(1385)<sup>+</sup>Λπ<sup>+</sup> + c.c.</td><td>&lt; 1.3 × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>75</sub></td><td>Σ(1385)<sup>-</sup>Λπ<sup>+</sup> + c.c.</td><td>&lt; 1.3 × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>76</sub></td><td>ΛΛη</td><td>(5.9 ± 1.5) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>77</sub></td><td>K<sup>+</sup>ρΛ+ c.c.</td><td>(4.2 ± 0.4) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>78</sub></td><td>ηK<sub>S</sub><sup>0</sup>Λ + c.c.</td><td>(1.66±0.17) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>79</sub></td><td>K<sup>*</sup>(892)<sup>+</sup>ρΛ+ c.c.</td><td>(4.9 ± 0.7) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>80</sub></td><td>K<sup>+</sup>ρΛ(1520) + c.c.</td><td>(1.7 ± 0.4) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>81</sub></td><td>Λ(1520)Λ(1520)</td><td>&lt; 9 × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>82</sub></td><td>Σ<sup>0</sup>Σ<sup>0</sup></td><td>(4.2 ± 0.6) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>83</sub></td><td>Σ<sup>0</sup>ρK<sup>0</sup>S<sup>0</sup> + c.c.</td><td>(1.53±0.12) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>84</sub></td><td>Σ<sup>0</sup>ρK<sup>+</sup> + c.c.</td><td>(1.46±0.10) × 10<sup>-4</sup></td></tr></tbody></table>

S=1.1

CL=90%

CL=90%

S=2.1

CL=90%

CL=90%

CL=90%

CL=90%

CL=90%

CL=90%

CL=90%

S=1.2

CL=90%

CL=90%

CL=90%

S=1.1

CL=90%

CL=90%

CL=90%

<table><tbody><tr><td>Γ<sub>85</sub></td><td>Σ<sup>+</sup>Σ<sup>-</sup></td><td>(3.6 ± 0.7) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>86</sub></td><td>Σ<sup>-</sup>Σ<sup>+</sup></td><td>(5.7 ± 1.5) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>87</sub></td><td>Σ(1385)<sup>+</sup>Σ(1385)<sup>-</sup></td><td>&lt; 9 × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>88</sub></td><td>Σ(1385)<sup>-</sup>Σ(1385)<sup>+</sup></td><td>&lt; 5 × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>89</sub></td><td>K<sup>-</sup>ΛΞ<sup>+</sup> + c.c.</td><td>(1.35±0.24) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>90</sub></td><td>Ξ<sup>0</sup>Ξ<sup>0</sup></td><td>(7.5 ± 1.3) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>91</sub></td><td>Ξ<sup>-</sup>Ξ<sup>+</sup></td><td>(6.0 ± 0.6) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>92</sub></td><td>Ω<sup>-</sup>Ω<sup>+</sup></td><td>(1.49±0.25) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>93</sub></td><td>π<sup>+</sup>π<sup>-</sup> + K<sup>+</sup>K<sup>-</sup></td><td>&lt; 2.1 × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>94</sub></td><td>K<sub>S</sub><sup>0</sup>K<sub>S</sub><sup>0</sup></td><td>&lt; 6 × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>95</sub></td><td>η<sub>c</sub>π<sup>+</sup>π<sup>-</sup></td><td>&lt; 3.2 × 10<sup>-3</sup></td></tr></tbody></table>

## Radiative decays

<table><tbody><tr><td>Γ<sub>96</sub></td><td>γJ/ψ(1S)</td><td>(34.3 ± 1.3) %</td></tr><tr><td>Γ<sub>97</sub></td><td>γρ<sup>0</sup></td><td>(2.16±0.17) × 10<sup>-4</sup></td></tr><tr><td>Γ<sub>98</sub></td><td>γω</td><td>(6.8 ± 0.8) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>99</sub></td><td>γφ</td><td>(2.4 ± 0.5) × 10<sup>-5</sup></td></tr><tr><td>Γ<sub>100</sub></td><td>γγ</td><td>&lt; 6.3 × 10<sup>-6</sup></td></tr><tr><td>Γ<sub>101</sub></td><td>e<sup>+</sup>e<sup>-</sup> J/ψ(1S)</td><td>(3.46±0.24) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>102</sub></td><td>μ<sup>+</sup>μ<sup>-</sup> J/ψ(1S)</td><td>(2.33±0.29) × 10<sup>-4</sup></td></tr></tbody></table>

## CONSTRAINED FIT INFORMATION

A multiparticle fit to $\chi_{c1}(1P)$, $\chi_{c0}(1P)$, $\chi_{c2}(1P)$, and $\psi(2S)$ with 4 total widths, a partial width, 25 combinations of partial widths obtained from integrated cross section, and 86 branching ratios uses 253 measurements to determine 49 parameters. The overall fit has a $\chi^2 = 389.6$ for 204 degrees of freedom.

The following off-diagonal array elements are the correlation coefficients $\langle\delta p_i\delta p_j\rangle/(\delta p_i\delta p_j)$, in percent, from the fit to parameters $p_i$, including the branching fractions, $x_i \equiv \Gamma_i/\Gamma_{\text{total}}$.

<table><tbody><tr><td>x<sub>48</sub></td><td>4</td></tr><tr><td>x<sub>58</sub></td><td>-1</td><td>0</td></tr><tr><td>x<sub>71</sub></td><td>12</td><td>5</td><td>-1</td></tr><tr><td>x<sub>96</sub></td><td>20</td><td>9</td><td>-25</td><td>23</td></tr><tr><td>Γ</td><td>-9</td><td>-4</td><td>-60</td><td>-11</td><td>-31</td></tr><tr><td>x<sub>19</sub></td><td>x<sub>48</sub></td><td>x<sub>58</sub></td><td>x<sub>71</sub></td><td>x<sub>96</sub></td></tr></tbody></table>

## $\chi_{c1}(1P)$ PARTIAL WIDTHS

<table><thead><tr><th>Γ(e<sup>+</sup>e<sup>-</sup>)</th><th>Γ<sub>2</sub></th></tr></thead><tbody><tr><td>VALUE (eV)</td><td>EVTS</td></tr><tr><td><b>0.12<sup>+0.13</sup><sub>-0.08</sub></b></td><td>250</td></tr><tr><td>DOCUMENT ID</td><td>1 ABLIKIM</td></tr><tr><td>TECN</td><td>22AF BES3</td></tr><tr><td>COMMENT</td><td>e<sup>+</sup>e<sup>-</sup> → χ<sub>c1</sub> → γJ/ψ</td></tr></tbody></table>

¹Assuming $\Gamma(\chi_{c1} \rightarrow \gamma J/\psi) = 0.28$ MeV.

## $\chi_{c1}(1P)$ Γ(j)Γ(γJ/ψ(1S))/Γ(total)

<table><thead><tr><th>Γ(pρ) × Γ(γJ/ψ(1S))/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>21.9±0.8 OUR FIT</td><td></td><td></td><td></td></tr><tr><td>21.4±0.9 OUR AVERAGE</td><td></td><td></td><td></td></tr><tr><td>21.5±0.5±0.8</td><td>1 ANDREOTTI</td><td>05A E835</td><td>pρ → e<sup>+</sup>e<sup>-</sup>γ</td></tr><tr><td>21.4±1.5±2.2</td><td>1,2 ARMSTRONG</td><td>92 E760</td><td>pρ → e<sup>+</sup>e<sup>-</sup>γ</td></tr><tr><td>19.9<sup>+4.4</sup><sub>-4.0</sub></td><td>1 BAGLIN</td><td>86B SPEC</td><td>pρ → e<sup>+</sup>e<sup>-</sup>χ</td></tr></tbody></table>

¹Calculated by us using $B(J/\psi(1S) \rightarrow e^{+}e^{-}) = 0.0593 \pm 0.0010$.

²Recalculated by ANDREOTTI 05A.

## $\chi_{c1}(1P)$ BRANCHING RATIOS

### HADRONIC DECAYS

<table><thead><tr><th>Γ(3(π<sup>+</sup>π<sup>-</sup>))/Γ<sub>total</sub></th><th>Γ<sub>3</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE (units 10<sup>-3</sup>)</td><td>EVTS</td></tr><tr><td>10.4 ± 1.6 OUR AVERAGE</td><td>Error includes scale factor of 4.6.</td></tr><tr><td>10.92±0.23±0.30</td><td>84K 1 ABLIKIM 22Q BES3 ψ(2S) → γ3(π<sup>+</sup>π<sup>-</sup>)</td></tr><tr><td>5.4 ± 0.7 ± 0.9</td><td>2 BAI 99B BES ψ(2S) → γχ<sub>c1</sub></td></tr><tr><td>16.0 ± 5.9 ± 0.8</td><td>2 TANENBAUM 78 MRK1 ψ(2S) → γχ<sub>c1</sub></td></tr></tbody></table>

¹ABLIKIM 22Q reports $(1.092 \pm 0.004 \pm 0.035) \times 10^{-2}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow 3(\pi^{+}\pi^{-}))]/[\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.75 \pm 0.24) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

²Rescaled by us using $B(\psi(2S) \rightarrow \gamma\chi_{c1}) = (8.8 \pm 0.4)\%$ and $B(\psi(2S) \rightarrow J/\psi(1S)\pi^{+}\pi^{-}) = (32.6 \pm 0.5)\%$.
$$\Gamma(2(\pi^+\pi^-))/\Gamma_{\text{total}}$$

$$\Gamma_4/\Gamma$$

VALUE (units 10⁻³)

DOCUMENT ID

TECN

COMMENT

7.6±2.6 OUR EVALUATION

Treating systematic error as correlated.

8

±4 OUR AVERAGE

Error includes scale factor of 1.5.

4.6±2.1±2.6

1

BAI

99B

BES

$\psi(2S) \rightarrow \gamma\chi_{c1}$

12.5±4.2±0.6

1

TANENBAUM

78

$\psi(2S) \rightarrow \gamma\chi_{c1}$

¹Rescaled by us using B(ψ(2S) → γχc1) = (8.8 ± 0.4)% and B(ψ(2S) → J/ψ(1S)π⁺π⁻) = (32.6 ± 0.5)%.

$$\Gamma(\pi^+\pi^-\pi^0\pi^0)/\Gamma_{\text{total}}$$

$$\Gamma_5/\Gamma$$

VALUE (%)

EVTS

DOCUMENT ID

TECN

COMMENT

1.19±0.15±0.03

604.7

1

HE

08B

CLEO

$e^+e^- \rightarrow \gamma h^+ h^- h^0 h^0$

¹HE 08B reports 1.28 ± 0.06 ± 0.15 ± 0.08 % from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \pi^+\pi^-\pi^0\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\rho^+\pi^-\pi^0\pi^0 + \text{c.c.})/\Gamma_{\text{total}}$$

$$\Gamma_6/\Gamma$$

VALUE (%)

EVTS

DOCUMENT ID

TECN

COMMENT

1.45±0.24±0.04

712.3

1,2

HE

08B

CLEO

$e^+e^- \rightarrow \gamma h^+ h^- h^0 h^0$

¹HE 08B reports 1.56 ± 0.13 ± 0.22 ± 0.10 % from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \rho^+\pi^-\pi^0\pi^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

²Calculated by us. We have added the values from HE 08b for $\rho^+\pi^-\pi^0\pi^0$ and $\rho^+\pi^-\pi^0$ decays assuming uncorrelated statistical and fully correlated systematic uncertainties.

$$\Gamma(\rho^0\pi^+\pi^-)/\Gamma_{\text{total}}$$

$$\Gamma_7/\Gamma$$

VALUE (units 10⁻³)

EVTS

DOCUMENT ID

TECN

COMMENT

3.9±3.5

1

TANENBAUM

78

$\psi(2S) \rightarrow \gamma\chi_{c1}$

¹Estimated using B(ψ(2S) → γχc1(1P)) = 0.087. The errors do not contain the uncertainty in the ψ(2S) decay.

$$\Gamma(4\pi^0)/\Gamma_{\text{total}}$$

$$\Gamma_8/\Gamma$$

VALUE (units 10⁻⁴)

EVTS

DOCUMENT ID

TECN

COMMENT

5.4±0.8±0.1

608

1

ABLIKIM

11A

BES3

$e^+e^- \rightarrow \psi(2S) \rightarrow \gamma\chi_{c1}$

¹ABLIKIM 11A reports (0.57 ± 0.03 ± 0.08) × 10⁻³ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow 4\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (9.2 ± 0.4) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\pi^+\pi^-\kappa^0\kappa^0)/\Gamma_{\text{total}}$$

$$\Gamma_9/\Gamma$$

VALUE (units 10⁻³)

DOCUMENT ID

TECN

COMMENT

4.5±1.0 OUR EVALUATION

Treating systematic error as correlated.

4.5±0.9 OUR AVERAGE

4.2±0.4±0.9

1

BAI

99B

BES

$\psi(2S) \rightarrow \gamma\chi_{c1}$

7.3±3.0±0.4

1

TANENBAUM

78

$\psi(2S) \rightarrow \gamma\chi_{c1}$

¹Rescaled by us using B(ψ(2S) → γχc1) = (8.8 ± 0.4)% and B(ψ(2S) → J/ψ(1S)π⁺π⁻) = (32.6 ± 0.5)%.

$$\Gamma(\kappa^0\kappa^-\pi^0\pi^0)/\Gamma_{\text{total}}$$

$$\Gamma_{10}/\Gamma$$

VALUE (units 10⁻³)

EVTS

DOCUMENT ID

TECN

COMMENT

1.12±0.27±0.03

45.1

1

HE

08B

CLEO

$e^+e^- \rightarrow \gamma h^+ h^- h^0 h^0$

¹HE 08B reports (0.12 ± 0.02 ± 0.02 ± 0.01) × 10⁻² from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^+\kappa^-\pi^0\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\kappa^+\kappa^-\pi^+\pi^-\pi^0)/\Gamma_{\text{total}}$$

$$\Gamma_{11}/\Gamma$$

VALUE (units 10⁻³)

EVTS

DOCUMENT ID

TECN

COMMENT

11.46±0.12±1.29

12k

1

ABLIKIM

13B

BES3

$e^+e^- \rightarrow \psi(2S) \rightarrow \gamma\chi_{c1}$

¹Using 1.06 × 10⁸ ψ(2S) mesons and B(ψ(2S) → χc1γ) = (9.2 ± 0.4)%.

$$\Gamma(\kappa_S^0\kappa^\mp\pi^+\pi^-)/\Gamma_{\text{total}}$$

$$\Gamma_{12}/\Gamma$$

VALUE (units 10⁻³)

EVTS

DOCUMENT ID

TECN

COMMENT

7.52±0.11±0.79

5.1k

1

ABLIKIM

13B

BES3

$e^+e^- \rightarrow \psi(2S) \rightarrow \gamma\chi_{c1}$

¹Using 1.06 × 10⁸ ψ(2S) mesons and B(ψ(2S) → χc1γ) = (9.2 ± 0.4)%.

$$\Gamma(\kappa^+\pi^-\kappa^0\pi^0 + \text{c.c.})/\Gamma_{\text{total}}$$

$$\Gamma_{13}/\Gamma$$

VALUE (%)

EVTS

DOCUMENT ID

TECN

COMMENT

0.86±0.13±0.02

141.3

1

HE

08B

CLEO

$e^+e^- \rightarrow \gamma h^+ h^- h^0 h^0$

¹HE 08B reports 0.92 ± 0.09 ± 0.11 ± 0.06 % from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^+\kappa^-\pi^0\pi^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\rho^-\kappa^+\kappa^0 + \text{c.c.})/\Gamma_{\text{total}}$$

$$\Gamma_{14}/\Gamma$$

VALUE (%)

EVTS

DOCUMENT ID

TECN

COMMENT

0.50±0.12±0.01

1

HE

08B

CLEO

$e^+e^- \rightarrow \gamma h^+ h^- h^0 h^0$

¹HE 08B reports 0.54 ± 0.11 ± 0.07 ± 0.03 % from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \rho^-\kappa^+\kappa^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\kappa^*(892)^0\kappa^0\pi^0 \rightarrow \kappa^+\pi^-\kappa^0\pi^0 + \text{c.c.})/\Gamma_{\text{total}}$$

$$\Gamma_{15}/\Gamma$$

VALUE (%)

EVTS

DOCUMENT ID

TECN

COMMENT

0.23±0.06±0.01

1

HE

08B

CLEO

$e^+e^- \rightarrow \gamma h^+ h^- h^0 h^0$

¹HE 08B reports 0.25 ± 0.06 ± 0.03 ± 0.02 % from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^*(892)^0\kappa^0\pi^0 \rightarrow \kappa^+\pi^-\kappa^0\pi^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\kappa^+\kappa^-\eta\pi^0)/\Gamma_{\text{total}}$$

$$\Gamma_{16}/\Gamma$$

VALUE (%)

EVTS

DOCUMENT ID

TECN

COMMENT

0.112±0.034±0.003

1

HE

08B

CLEO

$e^+e^- \rightarrow \gamma h^+ h^- h^0 h^0$

¹HE 08B reports 0.12 ± 0.03 ± 0.02 ± 0.01 % from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^+\kappa^-\eta\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\pi^+\pi^-\kappa_S^0\kappa_S^0)/\Gamma_{\text{total}}$$

$$\Gamma_{17}/\Gamma$$

VALUE (units 10⁻⁴)

EVTS

DOCUMENT ID

TECN

COMMENT

6.9±2.9±0.2

1

ABLIKIM

05B

$\psi(2S) \rightarrow \gamma\chi_{c1}\gamma$

¹ABLIKIM 05O reports (0.34 ± 0.10 ± 0.04) × 10⁻³ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^+\kappa^-\eta\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (0.67 ± 0.26 ± 0.11) × 10⁻⁴ which we divide by our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\kappa^+\kappa^-\eta)/\Gamma_{\text{total}}$$

$$\Gamma_{18}/\Gamma$$

VALUE (units 10⁻⁴)

DOCUMENT ID

TECN

COMMENT

3.2±1.0±0.1

1

ATHAR

07

CLEO

$\psi(2S) \rightarrow \gamma h^+ h^- h^0$

¹ATHAR 07 reports (0.34 ± 0.10 ± 0.04) × 10⁻³ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^+\kappa^-\eta)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (0.0907 ± 0.0011 ± 0.0054, which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻²). Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\kappa^*(892)^0\kappa^0 + \text{c.c.})/\Gamma_{\text{total}}$$

$$\Gamma_{20}/\Gamma$$

VALUE (units 10⁻³)

EVTS

DOCUMENT ID

TECN

COMMENT

1.03±0.15 OUR AVERAGE

1

AAIJ

$B^+ \rightarrow \kappa^+(K_S^0 K_\pi)$

1.04±0.13±0.10

2

23AH LHCB

$B^+ \rightarrow \kappa^+(K_S^0 K_\pi)$

0.98±0.37±0.03

2

ABLIKIM

$\psi(2S) \rightarrow \gamma\chi_{c1}$

¹AAIJ 23AH reports (1.04 ± 0.13 ± 0.04 ± 0.09) × 10⁻³ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^*(892)^0\kappa^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\chi_{c1}(1P) \rightarrow \kappa^0\kappa^+\pi^- + \text{c.c.})]$ assuming B(χc1(1P)) = (7.0 ± 0.6) × 10⁻³.

²ABLIKIM 06R reports (1.1 ± 0.4 ± 0.1) × 10⁻³ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^*(892)^0\kappa^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (8.7 ± 0.4) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\kappa^*(\gamma_{1430})^0\kappa^0 + \text{c.c.})/\Gamma_{\text{total}}$$

$$\Gamma_{21}/\Gamma$$

VALUE (units 10⁻³)

EVTS

DOCUMENT ID

TECN

COMMENT

1.21±0.23 OUR AVERAGE

1

1

$B^+ \rightarrow \kappa^+(K_S^0 K_\pi)$

1.18±0.17±0.17

2

23AH LHCB

$B^+ \rightarrow \kappa^+(K_S^0 K_\pi)$

1.43±0.65±0.04

2

ABLIKIM

$\psi(2S) \rightarrow \gamma\chi_{c1}$

¹AAIJ 23AH reports (1.18 ± 0.17 ± 0.14 ± 0.10) × 10⁻³ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^+\kappa^-\eta + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\chi_{c1}(1P) \rightarrow \kappa^0\kappa^+\pi^- + \text{c.c.})]$ assuming B(χc1(1P)) = (7.0 ± 0.6) × 10⁻³.

²ABLIKIM 06R reports (1.6 ± 0.7 ± 0.2) × 10⁻³ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^*(892)^0\kappa^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming B(ψ(2S) → γχc1(1P)) = (8.7 ± 0.4) × 10⁻², which we rescale to our best value B(ψ(2S) → γχc1(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\kappa^*(\gamma_{1430})^0\kappa^0 + \text{c.c.})/\Gamma_{\text{total}}$$

$$\Gamma_{22}/\Gamma$$

VALUE (%)

EVTS

CL%

DOCUMENT ID

TECN

COMMENT

0.86±0.13±0.02

90

1

ABLIKIM

06R

BES2

$\psi(2S) \rightarrow \gamma\chi_{c1}$
# Meson Particle Listings

## $\chi_{c1}(1P)$

$$ \Gamma(\chi_{c1}^{*}(1430) + \kappa^{-} + \text{c.c.} \rightarrow \kappa_{S}^{0}\kappa^{+}\pi^{-} + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{23}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL<sub>2</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;2.1 × 10<sup>-3</sup></td><td>90</td><td>1 ABLIKIM</td><td>06R BES2</td><td>ψ(2S) → γχ<sub>C1</sub></td></tr></tbody></table>

1 ABLIKIM 06R reports $< 2.4 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa_{S}^{*}(1430) + \kappa^{-} + \text{c.c.} \rightarrow \kappa_{S}^{0}\kappa^{+}\pi^{-} + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (8.7 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = 9.75 \times 10^{-2}$.

$$ \Gamma(\kappa^{+}\kappa^{-}\pi^{0})/\Gamma_{\text{total}} \quad \Gamma_{24}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.81 ± 0.24 ± 0.05</td><td>1 ATHAR</td><td>07</td><td>ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

1 ATHAR 07 reports $(1.95 \pm 0.16 \pm 0.23) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa^{+}\kappa^{-}\pi^{0})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = 0.0907 \pm 0.0011 \pm 0.0054$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\eta\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{25}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.62 ± 0.24 OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>4.58 ± 0.23 ± 0.13</td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr><tr><td>4.7 ± 0.5 ± 0.1</td><td>3 ATHAR</td><td>07 CLEO</td><td>ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr><tr><td>5.3 ± 0.9 ± 0.1</td><td>4 ABLIKIM</td><td>06R BES2</td><td>ψ(2S) → γχ<sub>C1</sub></td></tr></tbody></table>

1 From an amplitude analysis using an isobar model.

2 ABLIKIM 17k reports $(4.67 \pm 0.03 \pm 0.23 \pm 0.16) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 ATHAR 07 reports $(5.0 \pm 0.3 \pm 0.5) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = 0.0907 \pm 0.0011 \pm 0.0054$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

4 ABLIKIM 06R reports $(5.9 \pm 0.7 \pm 0.8) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (8.7 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(a_{0}(980)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{26}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.2 ± 0.4 OUR AVERAGE</td><td></td><td></td><td></td><td>Error includes scale factor of 2.1.</td></tr><tr><td>3.33 ± 0.19 ± 0.09</td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr><tr><td>1.79 ± 0.63 ± 0.05</td><td>58 3 ABLIKIM</td><td>06R BES2</td><td>ψ(2S) → γχ<sub>C1</sub></td></tr></tbody></table>

1 From an amplitude analysis using an isobar model.

2 ABLIKIM 17k reports $(3.40 \pm 0.03 \pm 0.19 \pm 0.11) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow a_{0}(980)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 ABLIKIM 06R reports $(2.0 \pm 0.5 \pm 0.5) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow a_{0}(980)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (8.7 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(a_{2}(1320)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{27}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.176 ± 0.023 ± 0.005</td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 From an amplitude analysis using an isobar model.

2 ABLIKIM 17k reports $(0.18 \pm 0.01 \pm 0.02 \pm 0.01) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow a_{2}(1320)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(a_{2}(1700)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{28}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.6 ± 0.7 ± 0.1</td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 From an amplitude analysis using an isobar model.

2 ABLIKIM 17k reports $(4.7 \pm 0.4 \pm 0.6 \pm 0.2) \times 10^{-5}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow a_{2}(1700)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(f_{2}(1270)\eta \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{29}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.5 ± 0.6 ± 0.1</td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 From an amplitude analysis using an isobar model.

2 ABLIKIM 17k reports $(0.36 \pm 0.01 \pm 0.06 \pm 0.01) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow f_{2}(1270)\eta \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(f_{4}(2050)\eta \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{30}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.5 ± 0.9 ± 0.1</td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 From an amplitude analysis using an isobar model.

2 ABLIKIM 17k reports $(2.6 \pm 0.4 \pm 0.8 \pm 0.1) \times 10^{-5}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow f_{4}(2050)\eta \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\pi_{1}(1400)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{31}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL<sub>2</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;5 × 10<sup>-5</sup></td><td>90</td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 From an amplitude analysis using an isobar model.

2 ABLIKIM 17k reports $< 4.6 \times 10^{-5}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \pi_{1}(1400)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = 9.75 \times 10^{-2}$.

$$ \Gamma(\pi_{1}(1600)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{32}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL<sub>2</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;1.5 × 10<sup>-5</sup></td><td>90</td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 From an amplitude analysis using an isobar model.

2 ABLIKIM 17k reports $< 1.5 \times 10^{-5}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \pi_{1}(1600)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = 9.75 \times 10^{-2}$.

$$ \Gamma(\pi_{1}(2015)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{33}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL<sub>2</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;8 × 10<sup>-6</sup></td><td>90</td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 From an amplitude analysis using an isobar model.

2 ABLIKIM 17k reports $< 8 \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \pi_{1}(2015)^{+}\pi^{-} + \text{c.c.} \rightarrow \eta\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = 9.75 \times 10^{-2}$.

$$ \Gamma(f_{2}(1270)\eta)/\Gamma_{\text{total}} \quad \Gamma_{34}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.67 ± 0.11 OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>0.63 ± 0.11 ± 0.02</td><td></td><td>1,2 ABLIKIM</td><td>17K BES3</td><td>ψ(2S) → γηπ<sup>+</sup>π<sup>-</sup></td></tr><tr><td>2.7 ± 0.8 ± 0.1</td><td>53</td><td>3 ABLIKIM</td><td>06R BES2</td><td>ψ(2S) → γχ<sub>C1</sub></td></tr></tbody></table>

1 ABLIKIM 17k reports $(6.4 \pm 1.1) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow f_{2}(1270)\eta)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 From an amplitude analysis using an isobar model.

3 ABLIKIM 06R reports $(3.0 \pm 0.7 \pm 0.5) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow f_{2}(1270)\eta)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (8.7 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\pi^{+}\pi^{-}\eta')/\Gamma_{\text{total}} \quad \Gamma_{35}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.2 ± 0.4 ± 0.1</td><td>1 ATHAR</td><td>07 CLEO</td><td>ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

1 ATHAR 07 reports $(2.4 \pm 0.4 \pm 0.3) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \pi^{+}\pi^{-}\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = 0.0907 \pm 0.0011 \pm 0.0054$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{C1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^{+}K^{-}\eta'(958))/\Gamma_{\text{total}} \quad \Gamma_{36}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>8.75 ± 0.87</td><td>310</td><td>1 ABLIKIM</td><td>14J BES3</td><td>ψ(2S) → γK<sup>+</sup>K<sup>-</sup>η'(958)</td></tr></tbody></table>

1 Derived using $B(\psi(2S) \rightarrow \gamma\chi_{C1}) = (9.2 \pm 0.4)\%$. Uncertainty includes both statistical and systematic contributions combined in quadrature.
$$ \Gamma(K_2^*(1430) + K^- + c.c.)/\Gamma_{\text{total}} \quad \Gamma_{41}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.61&plusmn;0.19&plusmn;0.24</td><td>351</td><td>1 AAIJ</td><td>23AH LHCB</td><td>B<sup>+</sup> &rarr; K<sup>+</sup>(K<sub>S</sub><sup>0</sup> K&pi;)</td></tr></tbody></table>

1 AAIJ 23AH reports (1.61 &plusmn; 0.19 &plusmn; 0.14) &times; 10<sup>-3</sup> from a measurement of [Γ(χ<sub>c1</sub>(1P) &rarr; K<sub>2</sub><sup>0</sup>(1430) + K<sup>-</sup> + c.c.)/Γ<sub>total</sub>] &times; [B(χ<sub>c1</sub>(1P) &rarr; R<sup>0</sup> K<sup>+</sup>π<sup>-</sup> + c.c.)] assuming B(χ<sub>c1</sub>(1P) &rarr; R<sup>0</sup> K<sup>+</sup>π<sup>-</sup> + c.c.) = (7.0 &plusmn; 0.6) &times; 10<sup>-3</sup>.

$$ \Gamma(K_2^*(1430)\bar{R}^0 + c.c.)/\Gamma_{\text{total}} \quad \Gamma_{42}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.17&plusmn;0.16&plusmn;0.11</td><td>278</td><td>1 AAIJ</td><td>23AH LHCB</td><td>B<sup>+</sup> &rarr; K<sup>+</sup>(K<sub>S</sub><sup>0</sup> K&pi;)</td></tr></tbody></table>

1 AAIJ 23AH reports (1.17 &plusmn; 0.16 &plusmn; 0.05 &plusmn; 0.10) &times; 10<sup>-3</sup> from a measurement of [Γ(χ<sub>c1</sub>(1P) &rarr; K<sub>2</sub><sup>0</sup>(1430)R<sup>0</sup> + c.c.)/Γ<sub>total</sub>] &times; [B(χ<sub>c1</sub>(1P) &rarr; R<sup>0</sup> K<sup>+</sup>π<sup>-</sup> + c.c.)] assuming B(χ<sub>c1</sub>(1P) &rarr; R<sup>0</sup> K<sup>+</sup>π<sup>-</sup> + c.c.) = (7.0 &plusmn; 0.6) &times; 10<sup>-3</sup>.

$$ \Gamma(K_0^*(1430) + K^- + c.c.)/\Gamma_{\text{total}} \quad \Gamma_{37}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>6.41&plusmn;0.57&plusmn;2.09</td><td>1 ABLIKIM</td><td>14j</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;K<sup>+</sup>K<sup>-</sup>&eta;'(958)</td></tr><tr><td>-2.71</td><td></td><td></td><td></td><td></td></tr></tbody></table>

1 Normalized to B(χ<sub>c1</sub> &rarr; K<sup>+</sup>K<sup>-</sup>η'(958)) branching fraction.

$$ \Gamma(f_0(980)\eta'(958))/\Gamma_{\text{total}} \quad \Gamma_{38}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.65&plusmn;0.47&plusmn;1.32</td><td>1 ABLIKIM</td><td>14j</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;K<sup>+</sup>K<sup>-</sup>&eta;'(958)</td></tr></tbody></table>

1 Normalized to B(χ<sub>c1</sub> &rarr; K<sup>+</sup>K<sup>-</sup>η'(958)) branching fraction.

$$ \Gamma(f_0(1710)\eta'(958))/\Gamma_{\text{total}} \quad \Gamma_{39}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.71&plusmn;0.22&plusmn;0.68</td><td>1 ABLIKIM</td><td>14j</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;K<sup>+</sup>K<sup>-</sup>&eta;'(958)</td></tr><tr><td>-0.48</td><td></td><td></td><td></td><td></td></tr></tbody></table>

1 Normalized to B(χ<sub>c1</sub> &rarr; K<sup>+</sup>K<sup>-</sup>η'(958)) branching fraction.

$$ \Gamma(f_2^*(1525)\eta'(958))/\Gamma_{\text{total}} \quad \Gamma_{40}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.92&plusmn;0.23&plusmn;0.55</td><td>1 ABLIKIM</td><td>14j</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;K<sup>+</sup>K<sup>-</sup>&eta;'(958)</td></tr></tbody></table>

1 Normalized to B(χ<sub>c1</sub> &rarr; K<sup>+</sup>K<sup>-</sup>η'(958)) branching fraction.

$$ \Gamma(\pi^0 f_0(980) \rightarrow \pi^0 \pi^+ \pi^-)/\Gamma_{\text{total}} \quad \Gamma_{43}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.35&plusmn;0.09</td><td></td><td>ABLIKIM</td><td>18d</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;&pi;0&pi;+&pi;-</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<6 90 1 ABLIKIM 11d BES3 ψ(2S) → γπ<sup>0</sup>π<sup>+</sup>π<sup>-</sup> 1 ABLIKIM 11d reports [Γ(χ<sub>c1</sub>(1P) → π<sup>0</sup>f<sub>0</sub>(980) → π<sup>0</sup>π<sup>+</sup>π<sup>-</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] &lt; 6.0 &times; 10<sup>-7</sup> which we divide by our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = 9.75 &times; 10<sup>-2</sup>.

$$ \Gamma(K^+\bar{R}^*(892)0\pi^- + c.c.)/\Gamma_{\text{total}} \quad \Gamma_{44}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>32&plusmn;21</td><td></td><td>1 TANENBAUM 78</td><td>MRK1</td><td>&psi;(2S) &rarr; &gamma;χ<sub>c1</sub></td></tr></tbody></table>

1 Estimated using B(ψ(2S) → γχ<sub>c1</sub>(1P)) = 0.087. The errors do not contain the uncertainty in the ψ(2S) decay.

$$ \Gamma(K^*(892)0\bar{R}^*(892)0)/\Gamma_{\text{total}} \quad \Gamma_{45}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.44&plusmn;0.36&plusmn;0.04</td><td>28.4 &plusmn; 5.5</td><td>1,2 ABLIKIM</td><td>04h BES</td><td>&psi;(2S) &rarr; &gamma;K<sup>+</sup>K<sup>-</sup>&pi;+&pi;-</td></tr></tbody></table>

1 ABLIKIM 04h reports [Γ(χ<sub>c1</sub>(1P) → K<sup>*</sup>(892)0R<sup>0</sup>K<sup>0</sup>S<sup>0</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] = (1.40 &plusmn; 0.27 &plusmn; 0.22) &times; 10<sup>-4</sup> which we divide by our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.27) &times; 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 Assumes B(K<sup>*</sup>(892)0 → K<sup>-</sup>π<sup>+</sup>) = 2/3.

$$ \Gamma(K^+K^-K_S^0K_S^0)/\Gamma_{\text{total}} \quad \Gamma_{46}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;4 &times; 10<sup>-4</sup></td><td>90</td><td>3.2 &plusmn; 2.4</td><td>1 ABLIKIM</td><td>05o BES2</td><td>&psi;(2S) &rarr; χ<sub>c1</sub>γ</td></tr></tbody></table>

1 ABLIKIM 05o reports [Γ(χ<sub>c1</sub>(1P) → K<sup>+</sup>K<sup>-</sup>K<sub>S</sub><sup>0</sup>K<sub>S</sub><sup>0</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] &lt; 4.2 &times; 10<sup>-5</sup> which we divide by our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = 9.75 &times; 10<sup>-2</sup>.

$$ \Gamma(K_S^0 K_S^0 K_S^0 K_S^0)/\Gamma_{\text{total}} \quad \Gamma_{47}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.35&plusmn;0.10&plusmn;0.01</td><td>22</td><td>1 ABLIKIM</td><td>19AA BES3</td><td>&psi;(2S) &rarr; &gamma;4K<sub>S</sub><sup>0</sup></td></tr></tbody></table>

1 Using B(K<sub>S</sub><sup>0</sup> → π<sup>+</sup>π<sup>-</sup>) = (69.20 &plusmn; 0.05)%. ABLIKIM 19AA reports [Γ(χ<sub>c1</sub>(1P) → K<sub>S</sub><sup>0</sup>K<sub>S</sub><sup>0</sup>K<sub>S</sub><sup>0</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] = (3.4 &plusmn; 0.9 &plusmn; 0.3) &times; 10<sup>-6</sup> which we divide by our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.27) &times; 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^+K^-\phi)/\Gamma_{\text{total}} \quad \Gamma_{49}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.41&plusmn;0.15&plusmn;0.01</td><td>17</td><td>1 ABLIKIM</td><td>06T</td><td>BES2</td><td>&psi;(2S) &rarr; &gamma;2K<sup>+</sup>2K<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 06T reports (0.46 &plusmn; 0.16 &plusmn; 0.06) &times; 10<sup>-3</sup> from a measurement of [Γ(χ<sub>c1</sub>(1P) → K<sup>+</sup>K<sup>-</sup>φ)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] assuming B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (8.7 &plusmn; 0.4) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.27) &times; 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\bar{R}^0 K^+\pi^-\phi + c.c.)/\Gamma_{\text{total}} \quad \Gamma_{50}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.27&plusmn;0.28&plusmn;0.46</td><td>ABLIKIM</td><td>15M</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;χ<sub>c1</sub></td></tr></tbody></table>

$$ \Gamma(K^+K^-\pi^0\phi)/\Gamma_{\text{total}} \quad \Gamma_{51}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.62&plusmn;0.12&plusmn;0.28</td><td>ABLIKIM</td><td>15M</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;χ<sub>c1</sub></td></tr></tbody></table>

$$ \Gamma(\phi\pi^+\pi^-\phi)/\Gamma_{\text{total}} \quad \Gamma_{52}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.75&plusmn;0.06&plusmn;0.08</td><td>373</td><td>1 ABLIKIM</td><td>13b</td><td>BES3</td><td>e<sup>+</sup>e<sup>-</sup> → &psi;(2S) &rarr; &gamma;χ<sub>c1</sub></td></tr></tbody></table>

1 Using 1.06 &times; 10<sup>8</sup> ψ(2S) mesons and B(ψ(2S) → χ<sub>c1</sub>γ) = (9.2 &plusmn; 0.4)%.

$$ \Gamma(\omega\omega)/\Gamma_{\text{total}} \quad \Gamma_{53}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>5.7&plusmn;0.7&plusmn;0.2</td><td>597</td><td>1 ABLIKIM</td><td>11k</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma; hadrons</td></tr></tbody></table>

1 ABLIKIM 11k reports (6.0 &plusmn; 0.3 &plusmn; 0.7) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>c1</sub>(1P) → ωφ)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] = (2.67 &plusmn; 0.31 &plusmn; 0.27) &times; 10<sup>-6</sup> which we divide by our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.27) &times; 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\omega K^+K^-)/\Gamma_{\text{total}} \quad \Gamma_{54}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.78&plusmn;0.04&plusmn;0.08</td><td>628</td><td>1 ABLIKIM</td><td>13b</td><td>BES3</td><td>e<sup>+</sup>e<sup>-</sup> → &psi;(2S) &rarr; &gamma;χ<sub>c1</sub></td></tr></tbody></table>

1 Using 1.06 &times; 10<sup>8</sup> ψ(2S) mesons and B(ψ(2S) → χ<sub>c1</sub>γ) = (9.2 &plusmn; 0.4)%.

$$ \Gamma(\omega\phi)/\Gamma_{\text{total}} \quad \Gamma_{55}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.27&plusmn;0.04&plusmn;0.01</td><td>105</td><td>1 ABLIKIM</td><td>19j</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma; hadrons</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

0.21&plusmn;0.06&plusmn;0.01 15 2,3 ABLIKIM 11k BES3 ψ(2S) → γ hadrons

1 ABLIKIM 19j reports [Γ(χ<sub>c1</sub>(1P) → ωφ)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] = (2.67 &plusmn; 0.31 &plusmn; 0.27) &times; 10<sup>-6</sup> which we divide by our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.27) &times; 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ABLIKIM 11k reports (0.22 &plusmn; 0.06 &plusmn; 0.02) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>c1</sub>(1P) → ωφ)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] assuming B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.2 &plusmn; 0.4) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.27) &times; 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 Superseded by ABLIKIM 19j.

$$ \Gamma(\phi\phi)/\Gamma_{\text{total}} \quad \Gamma_{56}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.26&plusmn;0.17&plusmn;0.12</td><td>1529</td><td>1,2 ABLIKIM</td><td>23N</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma; hadrons</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

4.2 &plusmn; 0.5 &plusmn; 0.1 366 3 ABLIKIM 11k BES3 ψ(2S) → γ hadrons

1 Using B(φ → K<sup>+</sup>K<sup>-</sup>) = (49.2 &plusmn; 0.5) &times; 10<sup>-2</sup> from PDG 22.

2 ABLIKIM 23N reports (4.26 &plusmn; 0.13 &plusmn; 0.15) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>c1</sub>(1P) → φφ)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] assuming B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.24) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.27) &times; 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 ABLIKIM 11k reports (4.4 &plusmn; 0.3 &plusmn; 0.5) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>c1</sub>(1P) → φφ)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] assuming B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.2 &plusmn; 0.4) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.27) &times; 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\phi\phi\eta)/\Gamma_{\text{total}} \quad \Gamma_{57}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.0&plusmn;0.5&plusmn;0.1</td><td>83.6</td><td>1 ABLIKIM</td><td>20b</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;&phi;&phi;&eta;</td></tr></tbody></table>

1 ABLIKIM 20B reports (2.96 &plusmn; 0.43 &plusmn; 0.22) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>c1</sub>(1P) → φφη)/Γ<sub>total</sub>] &times; [B(ψ(2S) → γχ<sub>c1</sub>(1P))] assuming B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.24) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.75 &plusmn; 0.27) &times; 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.
⁴ ATHAR 07 reports (3.3 ± 0.9 ± 0.4) × 10⁻⁴ from a measurement of Γ(χ<sub>c1</sub>(1P) → K⁺p̄A + c.c.)/Γ<sub>total</sub> × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(nK_S^0\bar{\Lambda} + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{78/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.66±0.16±0.05</td><td>399</td><td>1 ABLIKIM</td><td>21AV BES3</td><td>ψ(2S) → γnK<sub>S</sub><sup>0</sup>Λ + c.c.</td></tr></tbody></table>

¹ ABLIKIM 21AV reports (1.66 ± 0.12 ± 0.12) × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → nK<sub>S</sub><sup>0</sup>Λ + c.c.)/Γ<sub>total</sub> × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))]] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 0.0975 ± 0.0024, which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value. Also uses B(Λ̄ → p̄π⁻) = (63.9 ± 0.5)% and B(K<sub>S</sub><sup>0</sup> → π⁺π⁻) = (69.20 ± 0.05)%.

$$ \Gamma(K^*(892)^+\bar{\Lambda} + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{79/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.9±0.7±0.1</td><td>328</td><td>1 ABLIKIM</td><td>19AU BES3</td><td>ψ(2S) → γK<sup>+</sup>p̄Λ</td></tr></tbody></table>

¹ ABLIKIM 19AU reports [Γ(χ<sub>c1</sub>(1P) → K*(892) + p̄Λ + c.c.)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] = (4.8 ± 0.5 ± 0.4) × 10⁻⁵ which we divide by our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^+\bar{\Lambda}(1520) + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{80/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.71±0.44±0.05</td><td>48 ± 10</td><td>1 ABLIKIM</td><td>11F BES3</td><td>ψ(2S) → γp̄pK<sup>+</sup>K<sup>-</sup></td></tr></tbody></table>

¹ ABLIKIM 11F reports (1.81 ± 0.38 ± 0.28) × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → K⁺p̄Λ(1520) + c.c.)/Γ<sub>total</sub> × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))]] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.2 ± 0.4) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\Lambda(1520)\bar{\Lambda}(1520))/\Gamma_{\text{total}} \quad \Gamma_{81/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><9 × 10<sup>-5</sup></td><td>90</td><td>1 ABLIKIM</td><td>11F BES3</td><td>ψ(2S) → γp̄pK<sup>+</sup>K<sup>-</sup></td><td></td></tr></tbody></table>

¹ ABLIKIM 11F reports < 1.00 × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Λ(1520)Λ(1520))/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.2 ± 0.4) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 9.75 × 10⁻².

$$ \Gamma(\Sigma^0\bar{\Sigma}^0)/\Gamma_{\text{total}} \quad \Gamma_{82/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.2±0.6±0.1</td><td>103</td><td>1 ABLIKIM</td><td>18V BES3</td><td>ψ(2S) → γΣ<sup>0</sup>Σ<sup>0</sup></td><td></td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>&lt;6</td><td>90</td><td>2 ABLIKIM</td><td>13H BES3</td><td>ψ(2S) → γΣ<sup>0</sup>Σ<sup>0</sup></td><td></td></tr><tr><td>&lt;4</td><td>90</td><td>3.8 ± 2.5</td><td>08</td><td>CLEO</td><td>ψ(2S) → γΣ<sup>0</sup>Σ<sup>0</sup></td></tr></tbody></table>

¹ ABLIKIM 18V reports [Γ(χ<sub>c1</sub>(1P) → Σ<sup>0</sup>Σ<sup>0</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] = (0.41 ± 0.05 ± 0.03) × 10⁻⁵ which we divide by our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

² ABLIKIM 13H reports < 0.62 × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Σ<sup>0</sup>Σ<sup>0</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.2 ± 0.4) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 9.75 × 10⁻².

³ NAIK 08 reports < 0.44 × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Σ<sup>0</sup>Σ<sup>0</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 9.75 × 10⁻².

$$ \Gamma(\Sigma^+\bar{\Sigma}^-)/\Gamma_{\text{total}} \quad \Gamma_{85/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.6±0.6±0.1</td><td>59</td><td>1 ABLIKIM</td><td>18V BES3</td><td>ψ(2S) → γΣ<sup>+</sup>Σ<sup>-</sup></td><td></td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>&lt;8</td><td>90</td><td>2 ABLIKIM</td><td>13H BES3</td><td>ψ(2S) → γΣ<sup>+</sup>Σ<sup>-</sup></td><td></td></tr><tr><td>&lt;6</td><td>90</td><td>4.3 ± 2.3</td><td>08</td><td>CLEO</td><td>ψ(2S) → γΣ<sup>+</sup>Σ<sup>-</sup></td></tr></tbody></table>

¹ ABLIKIM 18V reports [Γ(χ<sub>c1</sub>(1P) → Σ<sup>+</sup>Σ<sup>-</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] = (0.35 ± 0.06 ± 0.02) × 10⁻⁵ which we divide by our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

² ABLIKIM 13H reports < 0.87 × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Σ<sup>+</sup>Σ<sup>-</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.2 ± 0.4) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 9.75 × 10⁻².

³ NAIK 08 reports < 0.65 × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Σ<sup>+</sup>Σ<sup>-</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 9.75 × 10⁻².

$$ \Gamma(\Sigma^-\bar{\Sigma}^+)/\Gamma_{\text{total}} \quad \Gamma_{86/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>5.7±1.5±0.2</td><td>214</td><td>1 ABLIKIM</td><td>20I BES3</td><td>ψ(2S) → γΣ<sup>-</sup>Σ<sup>+</sup></td></tr></tbody></table>

¹ ABLIKIM 20I reports (5.7 ± 1.4 ± 0.6) × 10⁻⁵ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Σ<sup>-</sup>Σ<sup>+</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.24) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\Sigma(1385)^+\bar{\Sigma}(1385^-))/\Gamma_{\text{total}} \quad \Gamma_{87/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;9 × 10<sup>-5</sup></td><td>90</td><td>1 ABLIKIM</td><td>12I BES3</td><td>ψ(2S) → γΛ̄π<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

¹ ABLIKIM 12I reports < 10 × 10⁻⁵ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Σ(1385) + Σ(1385⁻))/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.2 ± 0.4) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 9.75 × 10⁻².

$$ \Gamma(\Sigma(1385)^-\bar{\Sigma}(1385^+)/)\Gamma_{\text{total}} \quad \Gamma_{88/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;5 × 10<sup>-5</sup></td><td>90</td><td>1 ABLIKIM</td><td>12I BES3</td><td>ψ(2S) → γΛ̄π<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

¹ ABLIKIM 12I reports < 5.7 × 10⁻⁵ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Σ(1385) + Σ(1385⁺))/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.2 ± 0.4) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 9.75 × 10⁻².

$$ \Gamma(K^+\bar{\Lambda}^+ + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{89/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.35±0.24±0.04</td><td>49</td><td>1 ABLIKIM</td><td>15I BES3</td><td>ψ(2S) → γK<sup>-</sup>Λ̄<sup>+</sup> + c.c.</td></tr></tbody></table>

¹ ABLIKIM 15I reports [Γ(χ<sub>c1</sub>(1P) → K<sup>-</sup>Λ<sup>+</sup><sup>+</sup> + c.c.)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] = (1.32 ± 0.20 ± 0.12) × 10⁻⁵ which we divide by our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\Xi^0\bar{\Xi}^0)/\Gamma_{\text{total}} \quad \Gamma_{90/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>7.5±1.2±0.2</td><td>325</td><td>1 ABLIKIM</td><td>220 BES3</td><td>ψ(2S) → γΞ<sup>0</sup>Ξ<sup>0</sup></td><td></td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>&lt;6</td><td>90</td><td>1.7 ± 2.4</td><td>2 NAIK</td><td>08</td><td>CLEO</td><td>ψ(2S) → γΞ<sup>0</sup>Ξ<sup>0</sup></td></tr></tbody></table>

¹ ABLIKIM 22O reports (0.75 ± 0.11 ± 0.06) × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Ξ<sup>0</sup>Ξ<sup>0</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.24) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

² NAIK 08 reports < 0.60 × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Ξ<sup>0</sup>Ξ<sup>0</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 9.75 × 10⁻².

$$ \Gamma(\Xi^+\bar{\Xi}^-)/\Gamma_{\text{total}} \quad \Gamma_{91/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.60±0.06 OUR AVERAGE</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0.58±0.06±0.02</td><td>692</td><td>1 ABLIKIM</td><td>220 BES3</td><td>ψ(2S) → γΞ<sup>-</sup>Ξ<sup>+</sup></td><td></td></tr><tr><td>0.80±0.21±0.02</td><td>16.4 ± 4.3</td><td>2 NAIK</td><td>08 CLEO</td><td>ψ(2S) → γΞ<sup>+</sup>Ξ<sup>-</sup></td><td></td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>&lt;3.4</td><td>90</td><td>3 ABLIKIM</td><td>06B BES2</td><td>ψ(2S) → γχ<sub>c1</sub></td><td></td></tr></tbody></table>

¹ ABLIKIM 22O reports (0.58 ± 0.04 ± 0.05) × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Ξ<sup>-</sup>Ξ<sup>+</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.24) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

² NAIK 08 reports (0.86 ± 0.22 ± 0.08) × 10⁻⁴ from a measurement of [Γ(χ<sub>c1</sub>(1P) → Ξ<sup>-</sup>Ξ<sup>+</sup>)/Γ<sub>total</sub>] × [B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P))] assuming B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.07 ± 0.11 ± 0.54) × 10⁻², which we rescale to our best value B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = (9.75 ± 0.27) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

³ Using B(ψ<sub>2S</sub> → χ<sub>c1</sub>γ) (9.1 ± 0.6)%.

$$ \Gamma(\Omega^+\bar{\Omega}^-)/\Gamma_{\text{total}} \quad \Gamma_{92/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.49±0.23±0.10</td><td>277</td><td>1 ABLIKIM</td><td>23T BES3</td><td>χ<sub>cJ</sub> → Ω<sup>-</sup>Π<sup>+</sup></td></tr></tbody></table>

$$ \Gamma(\pi^+\pi^- + \Gamma(K^+K^-))/\Gamma_{\text{total}} \quad \Gamma_{93/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;21 × 10<sup>-4</sup></td><td></td><td>1 FELDMAN</td><td>77</td><td>MRK1 ψ(2S) → γχ<sub>c1</sub></td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>&lt;38 × 10<sup>-4</sup></td><td>90</td><td>1 BRANDELIK</td><td>79B DASP</td><td>ψ(2S) → γχ<sub>c1</sub></td><td></td></tr></tbody></table>

¹ Estimated using B(ψ<sub>2S</sub> → γχ<sub>c1</sub>(1P)) = 0.087. The errors do not contain the uncertainty in the ψ(2S) decay.
$\Gamma(\kappa_0^0 \kappa_S^0) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;6 &times; 10<sup>-5</sup></td><td>90</td><td>1 ABLIKIM</td><td>050 BES2</td><td>&psi;(2S) &rarr; &chi;<sub>C1</sub>&gamma;</td></tr></tbody></table>

1 ABLIKIM 050 reports $[\Gamma(\chi_{c1}(1P) \rightarrow \kappa_0^0 \kappa_S^0) / \Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))] < 0.6 \times 10^{-5}$ which we divide by our best value $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = 9.75 \times 10^{-2}$.

$\Gamma(\eta_c \pi^+ \pi^-) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;3.2 &times; 10<sup>-3</sup></td><td>90</td><td>1,2 ABLIKIM</td><td>13B BES3</td><td>e<sup>+</sup> e<sup>-</sup> &rarr; &psi;(2S) &rarr; &gamma;&chi;<sub>C1</sub></td></tr></tbody></table>

• • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>&lt;4.4 &times; 10<sup>-3</sup></th><th>90</th><th>1,3 ABLIKIM</th><th>13B BES3</th><th>e<sup>+</sup> e<sup>-</sup> &rarr; &psi;(2S) &rarr; &gamma;&chi;<sub>C1</sub></th></tr></thead></table>

1 Using $1.06 \times 10^9 \psi(2S)$ mesons and $B(\psi(2S) \rightarrow \chi_{c1}\gamma) = (9.2 \pm 0.4)\%$.

2 Using the $\eta_c \rightarrow \kappa_0^0 \kappa \pm \pi \mp$ decays.

3 Using the $\eta_c \rightarrow \kappa^+ \kappa^- \pi^0$ decays.

### RADIATIVE DECAYS

$\Gamma(\gamma\rho^0) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

#### 216&plusmn;8 OUR AVERAGE

<table><thead><tr><th>215&plusmn;22&plusmn;6</th><th>432 &plusmn; 25</th><th>1 ABLIKIM</th><th>11E BES3</th><th>&psi;(2S) &rarr; &gamma;&gamma;&rho;<sup>0</sup></th></tr></thead><tbody><tr><td>217&plusmn;24&plusmn;6</td><td>186 &plusmn; 15</td><td>2 BENNETT</td><td>08A CLEO</td><td>&psi;(2S) &rarr; &gamma;&gamma;&rho;<sup>0</sup></td></tr></tbody></table>

1 ABLIKIM 11E reports $(228 \pm 13 \pm 22) \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \gamma\rho^0) / \Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.2 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 BENNETT 08A reports $(243 \pm 19 \pm 22) \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \gamma\rho^0) / \Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (8.7 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$\Gamma(\gamma\omega) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

#### 68&plusmn;8 OUR AVERAGE

<table><thead><tr><th>66 &plusmn; 9 &plusmn; 2</th><th>136 &plusmn; 14</th><th>1 ABLIKIM</th><th>11E BES3</th><th>&psi;(2S) &rarr; &gamma;&gamma;&omega;</th></tr></thead><tbody><tr><td>74 &plusmn; 17 &plusmn; 2</td><td>39 &plusmn; 7</td><td>2 BENNETT</td><td>08A CLEO</td><td>&psi;(2S) &rarr; &gamma;&gamma;&omega;</td></tr></tbody></table>

1 ABLIKIM 11E reports $(69.7 \pm 7.2 \pm 6.6) \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \gamma\omega) / \Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.2 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 BENNETT 08A reports $(83 \pm 15 \pm 12) \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \gamma\omega) / \Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (8.7 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$\Gamma(\gamma\phi) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>24&plusmn;5&plusmn;1</td><td>43 &plusmn; 9</td><td>1 ABLIKIM</td><td>11E BES3</td><td>&psi;(2S) &rarr; &gamma;&gamma;&phi;</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>&lt;23</th><th>90</th><th>5.2 &plusmn; 3.1</th><th>2 BENNETT</th><th>08A CLEO</th><th>&psi;(2S) &rarr; &gamma;&gamma;&phi;</th></tr></thead></table>

1 ABLIKIM 11E reports $(25.8 \pm 5.2 \pm 2.3) \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \gamma\phi) / \Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.2 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 BENNETT 08A reports $\lt 26 \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow \gamma\phi) / \Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (8.7 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = 9.75 \times 10^{-2}$.

$\Gamma(\gamma\gamma) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt; 6.3 &times; 10<sup>-6</sup></td><td>90</td><td>ABLIKIM</td><td>17AE BES3</td><td>&psi;(2S) &rarr; &gamma;&chi;<sub>C1</sub> &rarr; 3&gamma;</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>&lt; 3.5 &times; 10<sup>-5</sup></th><th>90</th><th>ECKLUND</th><th>08A CLEO</th><th>&psi;(2S) &rarr; &gamma;&chi;<sub>C1</sub> &rarr; 3&gamma;</th></tr></thead><tbody><tr><td>&lt;150 &times; 10<sup>-5</sup></td><td>90</td><td>1 YAMADA</td><td>77 DASP</td><td>e<sup>+</sup>e<sup>-</sup> &rarr; 3&gamma;</td></tr></tbody></table>

1 Estimated using $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = 0.087$. The errors do not contain the uncertainty in the $\psi(2S)$ decay.

$\Gamma(e^{+}e^{-} J/\psi(1S)) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>3.65 &plusmn; 0.23 &plusmn; 0.10</th><th>1.9k</th><th>1,2 ABLIKIM</th><th>17I BES3</th><th>&psi;(2S) &rarr; &gamma;e<sup>+</sup>e<sup>-</sup> J/psi</th></tr></thead><tbody><tr><td>1 ABLIKIM 17I reports $(3.73 \pm 0.09 \pm 0.25) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c1}(1P) \rightarrow e^{+}e^{-} J/\psi(1S)) / \Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.55 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) = (9.75 \pm 0.27) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 Not independent from other measurements reported by ABLIKIM 17I.

$\Gamma(e^{+}e^{-} J/\psi(1S)) / \Gamma(\gamma J/\psi(1S))$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>10.1 &plusmn; 0.3 &plusmn; 0.5</td><td>1.9k</td><td>1 ABLIKIM</td><td>17I BES3</td><td>&psi;(2S) &rarr; e<sup>+</sup>e<sup>-</sup> J/psi</td></tr></tbody></table>

1 Uses $B(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) \times B(\chi_{c1}(1P) \rightarrow \gamma J/\psi(1S)) = (351.8 \pm 1.0 \pm 12.0) \times 10^{-4}$ from ABLIKIM 17N and accounts for common systematic errors.

$\Gamma(\mu^{+} \mu^{-} J/\psi(1S)) / \Gamma(e^{+}e^{-} J/\psi(1S))$

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>6.73 &plusmn; 0.51 &plusmn; 0.50</td><td>222</td><td>ABLIKIM</td><td>19Z BES3</td><td>&psi;(2S) &rarr; &gamma;&chi;<sub>C</sub> &rarr; &gamma;(\mu<sup>+</sup> \mu<sup>-</sup> J/\psi)</td></tr></tbody></table>

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>6.73 &plusmn; 0.51 &plusmn; 0.50</td><td>222</td><td>ABLIKIM</td><td>19Z BES3</td><td>&psi;(2S) &rarr; &gamma;&chi;<sub>C</sub> &rarr; &gamma;(\mu<sup>+</sup> \mu<sup>-</sup> J/\psi)</td></tr></tbody></table>

### $\chi_{c1}(1P)$ CROSS-PARTICLE BRANCHING RATIOS

$\Gamma(\chi_{c1}(1P) \rightarrow p\bar{p}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) / \Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^{+}\pi^{-})$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

2.13 &plusmn; 0.13 OUR FIT Error includes scale factor of 1.3.

<table><thead><tr><th>1.1 &plusmn; 1.0</th><th>1 BAI</th><th>98I BES</th><th>&psi;(2S) &rarr; &gamma;&chi;<sub>C1</sub> &rarr; &gamma;p\bar{p}</th></tr></thead></table>

1 Calculated by us. The value for $B(\chi_{c1} \rightarrow p\bar{p})$ reported in BAI 98i is derived using $B(\psi(2S) \rightarrow \gamma\chi_{c1}) = (8.7 \pm 0.8)\%$ and $B(\psi(2S) \rightarrow J/\psi(1S)\pi^{+}\pi^{-}) = (32.4 \pm 2.6)\%$ [BAI 980].

$\Gamma(\chi_{c1}(1P) \rightarrow \Lambda\bar{\Lambda}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>12.4 &plusmn; 0.9 OUR FIT Error includes scale factor of 1.1.</td><td></td><td></td><td></td><td></td></tr></tbody></table>

<table><thead><tr><th>2.13 &plusmn; 0.9 OUR AVERAGE</th><th>Error includes scale factor of 1.1.</th></tr></thead></table>

<table><thead><tr><th>12.8 &plusmn; 0.6 &plusmn; 0.6</th><th>528</th><th>ABLIKIM</th><th>21I BES3</th><th>&psi;(2S) &rarr; &gamma;p\pi<sup>-</sup> p\bar{p}^{+}</th></tr></thead><tbody><tr><td>10.5 &plusmn; 1.6 &plusmn; 0.6</td><td>46</td><td>1 NAIK</td><td>08 CLEO</td><td>&psi;(2S) &rarr; &gamma;\Lambda\bar{\Lambda}</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>11.2 &plusmn; 1.0 &plusmn; 0.9</th><th>136</th><th>2,3 ABLIKIM</th><th>13H BES3</th><th>&psi;(2S) &rarr; &gamma;\Lambda\bar{\Lambda}</th></tr></thead></table>

1 Calculated by us. NAIK 08 reports $B(\chi_{c1} \rightarrow \Lambda\bar{\Lambda}) = (11.6 \pm 1.8 \pm 0.7 \pm 0.7) \times 10^{-5}$ using $B(\psi(2S) \rightarrow \gamma\chi_{c1}) = (9.07 \pm 0.11 \pm 0.54)\%$.
2 Superseded by ABLIKIM 21I.
3 Calculated by us. ABLIKIM 13H reports $B(\chi_{c1} \rightarrow \Lambda\bar{\Lambda}) = (12.2 \pm 1.1 \pm 1.1) \times 10^{-5}$ from a measurement of $B(\chi_{c1} \rightarrow \Lambda\bar{\Lambda}) \times B(\psi(2S) \rightarrow \gamma\chi_{c1})$ assuming $B(\psi(2S) \rightarrow \gamma\chi_{c1}) = (9.2 \pm 0.4)\%$.

$\Gamma(\chi_{c1}(1P) \rightarrow \Lambda\bar{\Lambda}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) / \Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^{+}\pi^{-})$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

3.58 &plusmn; 0.25 OUR FIT Error includes scale factor of 1.1.

<table><thead><tr><th>7.1 &plusmn; 2.8 &plusmn; 1.3</th><th>9.0 &plusmn; 3.5 &plusmn; 3.1</th><th>1 BAI</th><th>03E BES</th><th>&psi;(2S) &rarr; &gamma;\Lambda\bar{\Lambda}</th></tr></thead></table>

1 BAI 03E reports $[B(\chi_{c1} \rightarrow \Lambda\bar{\Lambda}) \times B(\psi(2S) \rightarrow \gamma\chi_{c1}) / B(\psi(2S) \rightarrow J/\psi\pi^{+}\pi^{-})] \times [B^{2}(\Lambda \rightarrow \pi^{-} p) / B(J/\psi \rightarrow p\bar{p})] = (1.33^{+0.52}_{-0.46} \pm 0.25)\%$. We calculate from this measurement the presented value using $B(\Lambda \rightarrow \pi^{-} p) = (63.9 \pm 0.5)\%$ and $B(J/\psi \rightarrow p\bar{p}) = (2.17 \pm 0.07) \times 10^{-3}$.

$\Gamma(\chi_{c1}(1P) \rightarrow \Lambda\bar{\Lambda}\eta) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>5.72 &plusmn; 1.34 &plusmn; 0.65</td><td>21</td><td>ABLIKIM</td><td>22AO BES3</td><td>&psi;(2S) &rarr; &gamma;p\pi<sup>-</sup> p\bar{p}^{+}\gamma\gamma</td></tr></tbody></table>

<table><thead><tr><th>5.72 &plusmn; 1.34 &plusmn; 0.65</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

$\Gamma(\chi_{c1}(1P) \rightarrow \gamma J/\psi(1S)) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c1}(1P)) / \Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

<table><thead><tr><th>3.34 &plusmn; 0.10 OUR FIT</th><th>Error includes scale factor of 1.7.</th></tr></thead></table>

<table><thead><tr><th>3.24 &plusmn; 0.16 OUR AVERAGE</th><th>Error includes scale factor of 2.1.</th></tr></thead></table>

<table><thead><tr><th>3.518 &plusmn; 0.10 &plusmn; 0.120</th><th>143k</th><th>1 ABLIKIM</th><th>17N BES3</th><th>&psi;(2S) &rarr; &gamma;&gamma; J/\psi</th></tr></thead><tbody><tr><td>3.442 &plusmn; 0.10 &plusmn; 0.132</td><td>1.9M</td><td>ABLIKIM</td><td>17U BES3</td><td>e<sup>+</sup>e<sup>-</sup> &rarr; &gamma;X</td></tr><tr><td>2.81 &plusmn; 0.05 &plusmn; 0.23</td><td>13k</td><td>BAI</td><td>04I BES2</td><td>&psi;(2S) &rarr; J/\psi\gamma\gamma</td></tr><tr><td>2.56 &plusmn; 0.12 &plusmn; 0.20</td><td></td><td>GAISER</td><td>86 CBAL</td><td>&psi;(2S) &rarr; &gamma;X</td></tr><tr><td>2.78 &plusmn; 0.30</td><td></td><td>2 OREGLIA</td><td>82 CBAL</td><td>&psi;(2S) &rarr; &gamma;\chi_{c1}</td></tr><tr><td>2.2 &plusmn; 0.5</td><td></td><td>3 BRANDELIK</td><td>79B DASP</td><td>&psi;(2S) &rarr; &gamma;\chi_{c1}</td></tr><tr><td>2.9 &plusmn; 0.5</td><td></td><td>3 BARTEL</td><td>78B CNTR</td><td>&psi;(2S) &rarr; &gamma;\chi_{c1}</td></tr><tr><td>5.0 &plusmn; 1.5</td><td></td><td>4 BIDDICK</td><td>77 CNTR</td><td>e<sup>+</sup>e<sup>-</sup> &rarr; &gamma;X</td></tr><tr><td>2.8 &plusmn; 0.9</td><td></td><td>2 WHITAKER</td><td>76 MRK1</td><td>e<sup>+</sup>e<sup>-</sup></td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>3.377 &plusmn; 0.009 &plusmn; 0.183</th><th>142k</th><th>5 ABLIKIM</th><th>120 BES3</th><th>&psi;(2S) &rarr; &gamma;&chi;<sub>C1</sub></th></tr></thead><tbody><tr><td>3.56 &plusmn; 0.03 &plusmn; 0.12</td><td>24.9k</td><td>6 MENDEZ</td><td>08 CLEO</td><td>&psi;(2S) &rarr; &gamma;&chi;<sub>C1</sub></td></tr><tr><td>3.44 &plusmn; 0.06 &plusmn; 0.13</td><td>3.7k</td><td>7 ADAM</td><td>05A CLEO</td><td>Repl. by MENDEZ 08</td></tr></tbody></table>

1 Uses $B(J/\psi \rightarrow e^{+}e^{-}) = (5.971 \pm 0.032)\%$ and $B(J/\psi \rightarrow \mu^{+}\mu^{-}) = (5.961 \pm 0.033)\%$.

2 Recalculated by us using $B(J/\psi(1S) \rightarrow \ell^{+}\ell^{-}) = 0.1181 \pm 0.0020$.

3 Recalculated by us using $B(J/\psi(1S) \rightarrow \mu^{+}\mu^{-}) = 0.0588 \pm 0.0010$.

4 Assumes isotropic gamma distribution.

5 Superseded by ABLIKIM 17N.

6 Not independent from other measurements of MENDEZ 08.

7 Not independent from other values reported by ADAM 05A.
WEIGHTED AVERAGE
3.24±0.16 (Error scaled by 2.1)

<figure><img src="image_664.png" /></figure>

Values above of weighted average, error, and scale factor are based upon the data in this ideogram only. They are not necessarily the same as our 'best' values, obtained from a least-squares constrained fit utilizing measurements of other (related) quantities as additional information.

$$ \Gamma(\chi_{c1}(1P) \rightarrow \gamma J/\psi(1S))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c1}(1P))/\Gamma_{\text{total}} \text{ (units } 10^{-2}) $$

$$ \frac{\Gamma(\chi_{c1}(1P) \rightarrow \gamma J/\psi(1S))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c1}(1P))/\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^{+}\pi^{-})}{\Gamma_{96}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma_{12}^{\psi(2S)}} $$

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>9.63±0.29 OUR FIT</b></td><td></td><td></td><td></td><td>Error includes scale factor of 1.7.</td></tr></tbody></table>

### 10.15±0.28 OUR AVERAGE

<table><tbody><tr><td>10.17±0.07±0.27</td><td>24.9k</td><td>MENDEZ</td><td>08</td><td>CLEO</td><td>ψ(2S) → γχ<sub>c1</sub></td></tr><tr><td>12.6 ± 0.3 ± 3.8</td><td>3k</td><td>1 ABLIKIM</td><td>04B</td><td>BES</td><td>ψ(2S) → J/ψX</td></tr><tr><td>8.5 ± 2.1</td><td></td><td>2 HIMEL</td><td>80</td><td>MRK2</td><td>ψ(2S) → γχ<sub>c1</sub></td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><tbody><tr><td>10.24±0.17±0.23</td><td>3.7k</td><td>3 ADAM</td><td>05A</td><td>CLEO</td><td>Repl. by MENDEZ 08</td></tr></tbody></table>

¹ From a fit to the J/ψ recoil mass spectra.

² The value for B(ψ(2S) → γχ<sub>c1</sub>)×B(χ<sub>c1</sub> → γJ/ψ(1S)) quoted in HIMEL 80 is derived using B(ψ(2S) → J/ψ(1S)π<sup>+</sup>π<sup>-</sup>) = (33 ± 3)% and B(J/ψ(1S) → ℓ<sup>+</sup>ℓ<sup>-</sup>) = 0.138 ± 0.018. Calculated by us using B(J/ψ(1S) → ℓ<sup>+</sup>ℓ<sup>-</sup>) = 0.1181 ± 0.0020.

³ Not independent from other values reported by ADAM 05A.

$$ \frac{\Gamma(\chi_{c1}(1P) \rightarrow \bar{\mathcal{R}}^{0} K^{+} \pi^{-} + \text{c.c.})}{\Gamma_{19}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}} \times \frac{\Gamma(\psi(2S) \rightarrow \gamma \chi_{c1}(1P))}{\Gamma_{\text{total}}} $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>6.8±0.6 OUR FIT</b></td><td></td><td></td><td>Error includes scale factor of 1.1.</td></tr></tbody></table>

### 7.2±0.6 OUR AVERAGE

<table><tbody><tr><td>7.3±0.5±0.5</td><td>1 ATHAR</td><td>07</td><td>CLEO</td><td>ψ(2S) → γK<sup>0</sup><sub>S</sub>K<sup>+</sup>π<sup>-</sup></td></tr><tr><td>7.0±0.5±0.9</td><td>2 ABLIKIM</td><td>06R</td><td>BES2</td><td>ψ(2S) → γχ<sub>c1</sub></td></tr></tbody></table>

¹ Calculated by us. The value of B(χ<sub>c1</sub> → K<sup>0</sup><sub>S</sub>K<sup>+</sup>π<sup>-</sup> + c.c.) reported by ATHAR 07 was derived using B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (9.07 ± 0.11 ± 0.54)%.

² Calculated by us. ABLIKIM 06R reports B(χ<sub>c1</sub> → K<sup>0</sup><sub>S</sub>K<sup>+</sup>π<sup>-</sup>) = (4.0 ± 0.3 ± 0.5) × 10<sup>-3</sup>. We use B(ψ(2S) → γχ<sub>c1</sub>) = (8.7 ± 0.4) × 10<sup>-2</sup>.

$$ \frac{\Gamma(\chi_{c1}(1P) \rightarrow \bar{\mathcal{R}}^{0} K^{+} \pi^{-} + \text{c.c.})}{\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^{+}\pi^{-})} \times \frac{\Gamma_{19}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma_{12}^{\psi(2S)}}{\Gamma_{\text{total}}} $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>19.6±1.6 OUR FIT</b></td><td></td><td></td><td>Error includes scale factor of 1.1.</td></tr></tbody></table>

<table><tbody><tr><td>13.2±2.4±3.2</td><td>1 BAI</td><td>99B</td><td>BES</td><td>ψ(2S) → γK<sup>0</sup><sub>S</sub>K<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

¹ Calculated by us. The value of B(χ<sub>c1</sub> → K<sup>0</sup><sub>S</sub>K<sup>+</sup>π<sup>-</sup>) reported by BAI 99B was derived using B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (8.7 ± 0.8)% and B(ψ(2S) → J/ψπ<sup>+</sup>π<sup>-</sup>) = (32.4 ± 2.6)% [BAI 98D].

$$ \frac{\Gamma(\chi_{c1}(1P) \rightarrow K^{+} K^{-} K^{+} K^{-})}{\Gamma_{48}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma^{\psi(2S)}} \times \frac{\Gamma(\psi(2S) \rightarrow \gamma \chi_{c1}(1P))}{\Gamma_{\text{total}}} $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>0.53±0.11 OUR FIT</b></td><td></td><td></td><td></td><td></td></tr></tbody></table>

<table><tbody><tr><td>0.61±0.11±0.08</td><td>54</td><td>1 ABLIKIM</td><td>06T</td><td>BES2</td><td>ψ(2S) → γK<sup>+</sup>K<sup>+</sup>K<sup>-</sup>K<sup>-</sup></td></tr></tbody></table>

¹ Calculated by us. The value of B(χ<sub>c1</sub> → 2K<sup>+</sup>2K<sup>-</sup>) reported by ABLIKIM 06T was derived using B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (8.7 ± 0.8)%.

$$ \frac{\Gamma(\chi_{c1}(1P) \rightarrow K^{+} K^{-} K^{+} K^{-})}{\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^{+}\pi^{-})} \times \frac{\Gamma_{48}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma_{12}^{\psi(2S)}}{\Gamma_{\text{total}}} $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>1.52±0.31 OUR FIT</b></td><td></td><td></td><td></td></tr></tbody></table>

<table><tbody><tr><td>1.13±0.40±0.29</td><td>1 BAI</td><td>99B</td><td>BES</td><td>ψ(2S) → γK<sup>+</sup>K<sup>+</sup>K<sup>-</sup>K<sup>-</sup></td></tr></tbody></table>

¹ Calculated by us. The value of B(χ<sub>c1</sub> → 2K<sup>+</sup>2K<sup>-</sup>) reported by BAI 99B was derived using B(ψ(2S) → γχ<sub>c1</sub>(1P)) = (8.7 ± 0.8)% and B(ψ(2S) → J/ψπ<sup>+</sup>π<sup>-</sup>) = (32.4 ± 2.6)% [BAI 98D].

$$ \frac{\Gamma(\chi_{c1}(1P) \rightarrow p\bar{p})}{\Gamma_{\text{total}}} \times \frac{\Gamma(\psi(2S) \rightarrow \gamma \chi_{c1}(1P))}{\Gamma_{\text{total}}} \times \frac{\Gamma_{58}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma_{180}^{\psi(2S)}}{\Gamma_{\text{total}}} $$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>7.4±0.4 OUR FIT</b></td><td></td><td></td><td></td><td>Error includes scale factor of 1.3.</td></tr><tr><td><b>7.8±0.6 OUR AVERAGE</b></td><td></td><td></td><td></td><td>Error includes scale factor of 1.4. See the ideogram below.</td></tr></tbody></table>

<table><tbody><tr><td>7.9±0.4±0.3</td><td>453</td><td>1 ABLIKIM</td><td>13V</td><td>BES3</td><td>ψ(2S) → γp<span style="text-decoration: overline">p</span></td></tr><tr><td>8.2±0.7±0.4</td><td>141 ± 13</td><td>1 NAIK</td><td>08</td><td>CLEO</td><td>ψ(2S) → γp<span style="text-decoration: overline">p</span></td></tr></tbody></table>

<table><tbody><tr><td>4.8<sup>+1.4</sup><sub>-1.3</sub>±0.6</td><td>18.2<sup>+5.5</sup><sub>-4.9</sub></td><td>BAI</td><td>04F</td><td>BES</td><td>ψ(2S) → γχ<sub>c1</sub>(1P) → γp<span style="text-decoration: overline">p</span></td></tr></tbody></table>

¹ Calculated by us. NAIK 08 reports B(χ<sub>c1</sub> → p<span style="text-decoration: overline">p</span>) = (9.0 ± 0.8 ± 0.4 ± 0.5) × 10<sup>-5</sup> using B(ψ(2S) → γχ<sub>c1</sub>) = (9.07 ± 0.11 ± 0.54)%.

WEIGHTED AVERAGE
7.8±0.6 (Error scaled by 1.4)

<figure><img src="image_665.png" /></figure>

Values above of weighted average, error, and scale factor are based upon the data in this ideogram only. They are not necessarily the same as our 'best' values, obtained from a least-squares constrained fit utilizing measurements of other (related) quantities as additional information.

$$ \frac{\Gamma(\chi_{c1}(1P) \rightarrow p\bar{p})}{\Gamma_{\text{total}}} \times \frac{\Gamma(\psi(2S) \rightarrow \gamma \chi_{c1}(1P))}{\Gamma_{\text{total}}} \text{ (units } 10^{-6}) $$

$$ \frac{\Gamma(\chi_{c1}(1P) \rightarrow \Sigma^{+} \bar{p} K_{S}^{0} + \text{c.c.})}{\Gamma_{83}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma_{180}^{\psi(2S)}} \times \frac{\Gamma(\psi(2S) \rightarrow \gamma \chi_{c1}(1P))}{\Gamma_{\text{total}}} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>1.49±0.09±0.07</b></td><td>258</td><td>1 ABLIKIM</td><td>19BB</td><td>BES3</td><td>ψ(2S) → γΣ<sup>+</sup> p<span style="text-decoration: overline">p</span>K<sup>0</sup><sub>S</sub> + c.c.</td></tr></tbody></table>

¹ Calculated by us. ABLIKIM 19BB reports B(χ<sub>c1</sub> → Σ<sup>+</sup> p<span style="text-decoration: overline">p</span>K<sup>0</sup><sub>S</sub> + c.c.) = (1.53 ± 0.10 ± 0.08) × 10<sup>-4</sup> using B(ψ(2S) → γχ<sub>c1</sub>) = (9.75 ± 0.24)% and other branching fractions from PDG 18.

$$ \frac{\Gamma(\chi_{c1}(1P) \rightarrow \Sigma^{0} \bar{p} K^{+} + \text{c.c.})}{\Gamma_{84}/\Gamma \times \Gamma^{\psi(2S)}/\Gamma_{180}^{\psi(2S)}} \times \frac{\Gamma(\psi(2S) \rightarrow \gamma \chi_{c1}(1P))}{\Gamma_{\text{total}}} $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>1.42±0.07±0.06</b></td><td>493</td><td>1 ABLIKIM</td><td>20AE</td><td>BES3</td><td>ψ(2S) → γΣ<sup>0</sup> p<span style="text-decoration: overline">p</span>K<sup>+</sup> + c.c.</td></tr></tbody></table>

¹ Calculated by us. ABLIKIM 20AE reports B(χ<sub>c1</sub> → Σ<sup>0</sup> p<span style="text-decoration: overline">p</span>K<sup>+</sup> + c.c.) = (1.46 ± 0.07 ± 0.07) × 10<sup>-4</sup> using B(ψ(2S) → γχ<sub>c</sub><sup>0</sup>) = (9.75 ± 0.24)% and other branching fractions from PDG 20.

MULTIPOLE AMPLITUDES IN $\chi_{c1}(1P) \rightarrow \gamma J/\psi(1S)$

$$ a_2 = M_2/\sqrt{E1^2 + M_2^2} \quad \text{Magnetic quadrupole fractional transition amplitude} $$

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-6.7 ± 0.9 OUR AVERAGE</td><td></td><td></td><td></td><td>Error includes scale factor of 2.6. See the ideogram below.</td></tr></tbody></table>

<table><tbody><tr><td>-7.40±0.33±0.34</td><td>164k</td><td>1 ABLIKIM</td><td>17N</td><td>BES3</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>-6.26±0.63±0.24</td><td>39k</td><td>ARTUSO</td><td>09</td><td>CLEO</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>0.2 ± 3.2 ± 0.4</td><td>2090</td><td>AMBROGIANI</td><td>02</td><td>E835</td><td>p<span style="text-decoration: overline">p</span> → χ<sub>c1</sub> → J/ψγ</td></tr><tr><td>-0.2 ± 0.8</td><td>921</td><td>OREGLIA</td><td>82</td><td>CBAL</td><td>ψ(2S) → χ<sub>c1</sub>γ → J/ψγγ</td></tr></tbody></table>

¹ Correlated with $b_2$ with correlation coefficient $\rho_{a_2 b_2} = 0.133$.

<figure><img src="image_666.png" /></figure>

$$ a_2 = M_2/\sqrt{E1^2 + M_2^2} \text{ (units } 10^{-2}) $$
MULTIPOLE AMPLITUDES IN $\psi(2S) \rightarrow \gamma\chi_{c1}(1S)$ RADIATIVE DECAY

$b_2 = M_2/\sqrt{E1^2 + M_2^2}$ Magnetic quadrupole fractional transition amplitude

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5"><strong>2.5 &plusmn;0.4 OUR AVERAGE</strong></td></tr><tr><td>2.29 &plusmn;0.39 &plusmn;0.27</td><td>164k</td><td>1 ABLIKIM</td><td>17N BES3</td><td>&psi;(2S) &rarr; &gamma;&gamma;&ell;<sup>+</sup>&ell;<sup>-</sup></td></tr><tr><td>2.76 &plusmn;0.73 &plusmn;0.23</td><td>39k</td><td>ARTUSO</td><td>09 CLEO</td><td>&psi;(2S) &rarr; &gamma;&gamma;&ell;<sup>+</sup>&ell;<sup>-</sup></td></tr><tr><td>7.7 &plusmn;5.0<br/>-4.5</td><td>921</td><td>OREGLIA</td><td>82 CBAL</td><td>&psi;(2S) &rarr; &gamma;&gamma;&ell;<sup>+</sup>&ell;<sup>-</sup></td></tr></tbody></table>

¹Correlated with $\alpha_2$ with correlation coefficient $\rho_{\alpha_2\alpha_2} = 0.133$.

MULTIPOLE AMPLITUDE RATIOS IN RADIATIVE DECAYS

$\psi(2S) \rightarrow \gamma\chi_{c1}(1S)$ and $\chi_{c1} \rightarrow \gamma J/\psi(1S)$

$\alpha_2/b_2$ Magnetic quadrupole transition amplitude ratio

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-2.27<sup>+0.57</sup><sub>-0.99</sub></td><td>39k</td><td>1 ARTUSO</td><td>09 CLEO</td><td>&psi;(2S) &rarr; &gamma;&gamma;&ell;<sup>+</sup>&ell;<sup>-</sup></td></tr></tbody></table>

¹Statistical and systematic errors combined. Not independent of $\alpha_2(\chi_{c1})$ and $b_2(\chi_{c1})$ values from ARTUSO 09.

$\chi_{c1}(1P)$ REFERENCES

<table><thead><tr><th>AAJ</th><th>23AH</th><th>PR D108 032010</th><th>R. Aijj et al.</th><th>(LHCb Collab.)</th></tr></thead><tbody><tr><td>ABLIKIM</td><td>23N</td><td>JHEP 2305 069</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>23T</td><td>PR D107 092004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22AF</td><td>PRL 129 122001</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22AO</td><td>PR D106 072004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22D</td><td>JHEP 2206 074</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22Q</td><td>PR D106 032014</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>PDG</td><td>22</td><td>PTEP 2022 083C01</td><td>R. L. Workman et al.</td><td>(PDG Collab.)</td></tr><tr><td>ABLIKIM</td><td>21AV</td><td>JHEP 2111 217</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>21L</td><td>PRL 103 112004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>20AE</td><td>PR D102 092006</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>20B</td><td>PR D101 012012</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>20I</td><td>PR D101 092002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>PDG</td><td>20</td><td>PTEP 2020 083C01</td><td>P.A. Zyla et al.</td><td>(PDG Collab.)</td></tr><tr><td>ABLIKIM</td><td>19AA</td><td>PR D99 052008</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19AU</td><td>PR D100 052010</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19BB</td><td>PR D99 092006</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19J</td><td>PR D99 012015</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19Z</td><td>PR D99 051101</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>LU</td><td>19</td><td>PDG 032003</td><td>P.-C. Lu et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>18D</td><td>PRL 121 022001</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>18V</td><td>PR D97 052011</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>PDG</td><td>18</td><td>PR D98 030001</td><td>Tanabashi et al.</td><td>(PDG Collab.)</td></tr><tr><td>AAJ</td><td>17BB</td><td>EPJ C77 609</td><td>R. Aijj et al.</td><td>(LHCb Collab.)</td></tr><tr><td>AAJ</td><td>17BI</td><td>PRL 119 221801</td><td>R. Aijj et al.</td><td>(LHCb Collab.)</td></tr><tr><td>ABLIKIM</td><td>17AE</td><td>PR D96 092007</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17I</td><td>PRL 118 221802</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17K</td><td>PR D95 032002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17N</td><td>PR D95 072004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17U</td><td>PR D96 032001</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>PDG</td><td>16</td><td>CP C40 100001</td><td>C. Patrignani et al.</td><td>(PDG Collab.)</td></tr><tr><td>ABLIKIM</td><td>15I</td><td>PR D91 092006</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>15IM</td><td>PR D91 112008</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>14J</td><td>PR D89 074030</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13B</td><td>PR D87 012002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13D</td><td>PR D87 012007</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13H</td><td>PR D87 032007</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13V</td><td>PR D88 012001</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12I</td><td>PR D86 012004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12J</td><td>PR D86 052011</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12O</td><td>PRL 109 172002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11A</td><td>PR D83 012006</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11D</td><td>PR D83 032003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11E</td><td>PR D83 112005</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11F</td><td>PR D83 112009</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11K</td><td>PRL 107 092001</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ONYSI</td><td>10</td><td>P.B.E. Oonyisi et al.</td><td>(CLEO Collab.)</td><td>(CLEO Collab.)</td></tr><tr><td>ARTUSO</td><td>09</td><td>PR D80 112003</td><td>M. Artuso et al.</td><td>(CLEO Collab.)</td></tr><tr><td>BENNETT</td><td>08A</td><td>PR L101 151801</td><td>J.V. Bennett et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ECKLUND</td><td>08A</td><td>PR D78 091501</td><td>K.M. Ecklund et al.</td><td>(CLEO Collab.)</td></tr><tr><td>HE</td><td>08B</td><td>PR D78 092004</td><td>Q. He et al.</td><td>(CLEO Collab.)</td></tr><tr><td>MENDEZ</td><td>08</td><td>PR D78 011102</td><td>H. Mendez et al.</td><td>(CLEO Collab.)</td></tr><tr><td>NAIK</td><td>08</td><td>PR D78 031101</td><td>P. Naik et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ATHAR</td><td>07</td><td>PR D75 032002</td><td>S.B. Athar et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ABLIKIM</td><td>06D</td><td>PR D73 052006</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06R</td><td>PR D74 072001</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06T</td><td>PL B642 197</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05G</td><td>PR D71 092002</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05O</td><td>PR D630 21</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ADAM</td><td>05A</td><td>PR L94 232002</td><td>N.E. Adam et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ANDREOTTI</td><td>05A</td><td>NP B717 34</td><td>M. Andreotti et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>ABLIKIM</td><td>04B</td><td>PR D70 012003</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>04H</td><td>PR D70 092003</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>4F</td><td>PR D69 092001</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>04</td><td>PR D70 012006</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>AULCHENKO</td><td>03</td><td>PL B573 63</td><td>V.M. Aulchenko et al.</td><td>(KEDR Collab.)</td></tr><tr><td>BAI</td><td>03E</td><td>PR D67 112001</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>AMBROGIANI</td><td>02</td><td>PR D65 052002</td><td>M. Ambrogiani et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>BAI</td><td>99B</td><td>PR D60 072002</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>98D</td><td>PR D58 092006</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>98I</td><td>PR D81 3091</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>ARMSTRONG</td><td>92</td><td>NP B373 35</td><td>T.A. Armstrong et al.<br/>T.A. Armstrong et al.</td><td>(FNAL, FERR, GENO+)<br/>(FNAL, FERR, GENO+)</td></tr><tr><td>Also</td><td></td><td>PRL 68 1468</td><td>C. Baglin (LAPP, CERN, GENO, LYON, OSLO+)</td><td></td></tr><tr><td>BAGLIN</td><td>86B</td><td>PL B172 455</td><td>J. Gaiser et al.</td><td>(Crystal Ball Collab.)</td></tr><tr><td>GAISER</td><td>86</td><td>PR D34 711</td><td>Y. Lemaigle et al.</td><td>(SACL, LOIC, SHMP+)</td></tr><tr><td>LEMOIGNE</td><td>82</td><td>PR D73 509</td><td>M.J. Oreglia et al.</td><td>(SLAC, CIT, HARV+)</td></tr><tr><td>OREGLIA</td><td>82</td><td>PR D25 2259</td><td>M.J. Oreglia et al.</td><td>(EFI)</td></tr><tr><td>Also</td><td></td><td>Private Comm.</td><td>M.J. Oreglia</td><td></td></tr><tr><td>Also</td><td>80</td><td>PRL 44 920</td><td>T. Himel et al.<br/>G. Trilling</td><td>(LBL, SLAC)<br/>(LBL, UCB)</td></tr><tr><td>BRANDELIK</td><td>79B</td><td>PR NL B160 426</td><td>R. Brandelik et al.</td><td>(DASP Collab.)</td></tr><tr><td>BARTEL</td><td>78B</td><td>PL 79B 492</td><td>W. Bartel et al.<br/>(DESY, HEIDP)</td><td></td></tr><tr><td>TANENBAUM</td><td>78</td><td>PR D17 1731</td><td>W.M. Tanenbaum et al.<br/>G. Trilling</td><td>(SLAC, LBL)<br/>(SLAC, UCB)</td></tr><tr><td>Also</td><td></td><td>Private Comm.</td><td>W.M. Tanenbaum et al.</td><td></td></tr><tr><td>BIDDICK</td><td>77</td><td>PRL 38 1324</td><td>C.J. Biddick et al.</td><td>(UCSD, UMD, PAVI+)</td></tr><tr><td>FELDMAN</td><td>77</td><td>PRPL 33C 285</td><td>G.J. Feldman, M.L. Perl<br/>S. Yamada</td><td>(LBL, SLAC)</td></tr><tr><td>YAMADA</td><td>77</td><td>PR L7 3596</td><td>J.S. Whitaker et al.</td><td>(DASP Collab.)</td></tr><tr><td>WHITAKER</td><td>76</td><td>PRL 37 1596</td><td>W.M. Tanenbaum et al.</td><td>(SLAC, LBL)</td></tr><tr><td>TANENBAUM</td><td>75</td><td>PRL 35 1323</td><td></td><td>(LBL, SLAC)</td></tr></tbody></table>

$h_c(1P)$

$I^G(JPC) = 0^{-}(1^{-})$

Quantum numbers are quark model prediction, C = — established by $\eta_C\gamma$ decay.

$h_c(1P)$ MASS

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3525.37 &plusmn; 0.14</td><td>OUR AVERAGE</td><td></td><td></td><td>Error includes scale factor of 1.2.</td></tr><tr><td>3525.32 &plusmn; 0.06 &plusmn; 0.15</td><td>23k</td><td>ABLIKIM</td><td>22AQ BES3</td><td>&psi;(2S) &rarr; &pi;<sup>0</sup> hadrons;<br/>&pi;<sup>0</sup>&gamma;(&eta;<sub>C</sub>)</td></tr><tr><td>3525.20 &plusmn; 0.18 &plusmn; 0.12</td><td>1282</td><td>1 DOBBS</td><td>08A CLEO</td><td>&psi;(2S) &rarr; &pi;<sup>0</sup> &eta;<sub>C</sub> &gamma;</td></tr><tr><td>3525.8 &plusmn; 0.2 &plusmn; 0.2</td><td>13</td><td>ANDREOTTI</td><td>05B E835</td><td>&pi;p &rarr; &eta;<sub>C</sub> &gamma;</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>3525.31 &plusmn; 0.11 &plusmn; 0.14</td><td>832</td><td>2,3 ABLIKIM</td><td>12N BES3</td><td>&psi;(2S) &rarr; &pi;<sup>0</sup> &gamma; hadrons</td></tr><tr><td>3525.40 &plusmn; 0.13 &plusmn; 0.18</td><td>3679</td><td>2 ABLIKIM</td><td>10B BES3</td><td>&psi;(2S) &rarr; &pi;<sup>0</sup> &gamma; &eta;<sub>C</sub></td></tr><tr><td>3525.6 &plusmn; 0.5</td><td>92</td><td>ADAMS</td><td>09 CLEO</td><td>&psi;(2S) &rarr; 2(&pi; + &pi;<sup>-</sup> - &pi;<sup>0</sup>)</td></tr><tr><td>3524.4 &plusmn; 0.6 &plusmn; 0.4</td><td>168</td><td>4 ROSNER</td><td>05 CLEO</td><td>&psi;(2S) &rarr; &pi;<sup>0</sup> &eta;<sub>C</sub> &gamma;</td></tr><tr><td>3527 &plusmn; 8</td><td>42</td><td>ANTONIAZZI</td><td>94 E705</td><td>300 &pi;<sup>&pm;</sup>, pLi &rarr;<br/>J/&psi;&pi;<sup>0</sup>X</td></tr><tr><td>3526.28 &plusmn; 0.18 &plusmn; 0.19</td><td>59</td><td>5 ARMSTRONG</td><td>92D E760</td><td>&pi;p &rarr; J/&psi;&pi;<sup>0</sup></td></tr><tr><td>3525.4 &plusmn; 0.8 &plusmn; 0.4</td><td>5</td><td>BAGLIN</td><td>86 SPEC</td><td>&pi;p &rarr; J/&psi;&pi;</td></tr></tbody></table>

¹Combination of exclusive and inclusive analyses for the reaction $\psi(2S) \rightarrow \pi^0 h_c \rightarrow \pi^0 \eta_c \gamma$. This result is the average of DOBBS 08A and ROSNER 05.

²Superseded by ABLIKIM 22AQ

³With floating width.

⁴Superseded by DOBBS 08A.

⁵Mass central value and systematic error recalculated by us according to Eq. (16) in ARMSTRONG 93B, using the value for the $\psi(2S)$ mass from AULCHENKO 03.

$h_c(1P)$ WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>CL%<br/>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.78<sup>+0.27</sup><sub>-0.24</sub> &plusmn; 0.12</td><td>23k</td><td>ABLIKIM</td><td>22AQ BES3</td><td>&psi;(2S) &rarr; &pi;<sup>0</sup> hadrons;<br/>&pi;<sup>0</sup>&gamma;(&eta;<sub>C</sub>)</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>0.70 &plusmn; 0.28 &plusmn; 0.22</th><th>832</th><th>1,2 ABLIKIM</th><th>12N BES3</th><th>&psi;(2S) &rarr; &pi;<sup>0</sup> &gamma; hadrons</th></tr></thead><tbody><tr><td>&lt; 1.44</td><td>90</td><td>3 ABLIKIM</td><td>10B BES3</td><td>&psi;(2S) &rarr; &pi;<sup>0</sup> &gamma; &eta;<sub>C</sub></td></tr><tr><td>&lt; 1</td><td>13</td><td>ANDREOTTI</td><td>05B E835</td><td>&pi;p &rarr; &eta;<sub>C</sub> &gamma;</td></tr><tr><td>&lt; 1.1</td><td>90</td><td>ARMSTRONG</td><td>92D E760</td><td>&pi;p &rarr; J/&psi;&pi;<sup>0</sup></td></tr></tbody></table>

¹Superseded by ABLIKIM 22AQ

²With floating mass.

³The central value is $\Gamma = 0.73 \pm 0.45 \pm 0.28$ MeV.

$h_c(1P)$ DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>f</sub>/Γ)</th><th>Confidence level</th></tr></thead><tbody><tr><td>Γ<sub>1</sub></td><td>&lt; 5</td><td>90%</td></tr><tr><td>Γ<sub>2</sub></td><td>not seen</td><td></td></tr><tr><td>Γ<sub>3</sub></td><td>&lt; 2.7</td><td>90%</td></tr><tr><td>Γ<sub>4</sub></td><td>&lt; 1.7</td><td>90%</td></tr><tr><td>Γ<sub>5</sub></td><td>&lt; 8</td><td>90%</td></tr><tr><td>Γ<sub>6</sub></td><td>(3.3 &plusmn; 0.6) &times; 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>7</sub></td><td>&lt; 6</td><td>90%</td></tr><tr><td>Γ<sub>8</sub></td><td>(4.4 &plusmn; 1.3) &times; 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>9</sub></td><td>(7.4 &plusmn; 2.2) &times; 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>10</sub></td><td>(1.9 &plusmn; 0.5) &times; 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>11</sub></td><td>(8.3 &plusmn; 2.4) &times; 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>12</sub></td><td>(9.4 &plusmn; 1.7) &times; 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>13</sub></td><td>&lt; 1.0</td><td>%</td></tr><tr><td>Γ<sub>14</sub></td><td>&lt; 7</td><td>90%</td></tr><tr><td>Γ<sub>15</sub></td><td>(3.8 &plusmn; 0.8) &times; 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>16</sub></td><td>&lt; 2.7</td><td>90%</td></tr><tr><td>Γ<sub>17</sub></td><td>&lt; 6</td><td>90%</td></tr><tr><td>Γ<sub>18</sub></td><td>&lt; 2.4</td><td>90%</td></tr><tr><td>Γ<sub>19</sub></td><td>&lt; 1.0</td><td>90%</td></tr><tr><td>Γ<sub>20</sub></td><td>&lt; 2.8</td><td>90%</td></tr><tr><td>Γ<sub>21</sub></td><td>&lt; 6</td><td>90%</td></tr><tr><td>Γ<sub>22</sub></td><td>(3.2 &plusmn; 1.0) &times; 10<sup>-3</sup></td><td></td></tr></tbody></table>

Radiative decays

<table><tbody><tr><td>Γ<sub>23</sub></td><td>γη</td><td>(4.7 &plusmn; 2.1) &times; 10<sup>-4</sup></td></tr><tr><td>Γ<sub>24</sub></td><td>γη'(958)</td><td>(1.5 &plusmn; 0.4) &times; 10<sup>-3</sup></td></tr><tr><td>Γ<sub>25</sub></td><td>γη<sub>c</sub>(15)</td><td>(60 &plusmn; 4) %</td></tr></tbody></table>
## FIT INFORMATION

A multiparticle fit to $\eta_c(1S)$, $J/\psi(1S)$, $\psi(2S)$, $h_c(1P)$, and $B^\pm$ with the total width, 10 combinations of partial widths obtained from integrated cross section, and 38 branching ratios uses 113 measurements to determine 19 parameters. The overall fit has a $\chi^2 = 184.6$ for 94 degrees of freedom.

## $h_c(1P)$ PARTIAL WIDTHS

$$h_c(1P) \quad \Gamma(i)\Gamma(p\bar{p})/\Gamma(\text{total})$$

$$\Gamma(\gamma\eta_c(1S)) \times \Gamma(p\bar{p})/\Gamma_{\text{total}} \quad \Gamma_{25}\Gamma_{4}/\Gamma$$

$$\text{VALUE (eV)} \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

• • • We do not use the following data for averages, fits, limits, etc. • • •

$$12.0 \pm 4.5 \quad 13 \quad 1 \text{ ANDREOTTI} \quad 05B \quad E835 \quad p\bar{p} \rightarrow \eta_c \gamma$$

¹ Assuming $\Gamma = 1$ MeV.

## $h_c(1P)$ BRANCHING RATIOS

$$\Gamma(J/\psi(1S)\pi^0)/\Gamma(\gamma\eta_c(1S)) \quad \Gamma_{1/\Gamma_{25}}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<9 \times 10^{-4} \quad 90 \quad 1 \text{ ABLIKIM} \quad 22N \quad BES3 \quad e^+ e^- \rightarrow \pi^+ \pi^- h_c$$

¹ ABLIKIM 22N reports $[\Gamma(h_c(1P) \rightarrow J/\psi(1S)\pi^0)/\Gamma(h_c(1P) \rightarrow \gamma\eta_c(1S))] / [B(\eta_c \rightarrow K^+ K^- \pi^0)] < 7.5 \times 10^{-2}$ which we multiply by our best value $B(\eta_c \rightarrow K^+ K^- \pi^0) = 1/6 B(\eta_c(1S) \rightarrow K \bar{K} \pi) = 1/6 (7.1 \times 10^{-2})$.

$$\Gamma(J/\psi(1S)\pi\pi)/\Gamma(J/\psi(1S)\pi^0) \quad \Gamma_{2/\Gamma_{1}}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<0.18 \quad 90 \quad \text{ARMSTRONG} \quad 92D \quad E760 \quad \bar{p}p \rightarrow J/\psi\pi^0$$

$$\Gamma(J/\psi(1S)\pi^+\pi^-)/\Gamma_{\text{total}} \quad \Gamma_{3/\Gamma}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<2.7 \times 10^{-3} \quad 90 \quad 1 \text{ ABLIKIM} \quad 18M \quad BES3 \quad \psi(2S) \rightarrow \pi^0 \pi^+ \pi^- J/\psi$$

¹ ABLIKIM 18M reports $[\Gamma(h_c(1P) \rightarrow J/\psi(1S)\pi^+\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 2.0 \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

$$\Gamma(p\bar{p})/\Gamma_{\text{total}} \quad \Gamma_{4/\Gamma}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<1.7 \times 10^{-4} \quad 90 \quad 1 \text{ ABLIKIM} \quad 13V \quad BES3 \quad \psi(2S) \rightarrow \gamma p\bar{p}$$

¹ ABLIKIM 13V reports $[\Gamma(h_c(1P) \rightarrow p\bar{p})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 1.3 \times 10^{-7}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

$$\Gamma(p\bar{p}\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{5/\Gamma}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<8 \times 10^{-4} \quad 90 \quad 1 \text{ ABLIKIM} \quad 22M \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 22M reports $[\Gamma(h_c(1P) \rightarrow p\bar{p}\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 5.67 \times 10^{-7}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

$$\Gamma(p\bar{p}\pi^+\pi^-)/\Gamma_{\text{total}} \quad \Gamma_{6/\Gamma}$$

$$\text{VALUE (units 10}^{-3}) \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$3.3 \pm 0.5 \pm 0.2 \quad 230 \quad 1 \text{ ABLIKIM} \quad 19AG \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 19AG reports $[\Gamma(h_c(1P) \rightarrow p\bar{p}\pi^+\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] = (2.49 \pm 0.27 \pm 0.28) \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = (7.4 \pm 0.5) \times 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(p\bar{p}\pi^0\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{7/\Gamma}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<6 \times 10^{-4} \quad 90 \quad 1 \text{ ABLIKIM} \quad 20AH \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 20AH reports $[\Gamma(h_c(1P) \rightarrow p\bar{p}\pi^0\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 4.4 \times 10^{-7}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

$$\Gamma(p\bar{p}\pi^+\pi^-\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{8/\Gamma}$$

$$\text{VALUE (units 10}^{-3}) \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$4.4 \pm 1.2 \pm 0.3 \quad 86 \quad 1 \text{ ABLIKIM} \quad 22M \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 22M reports $[\Gamma(h_c(1P) \rightarrow p\bar{p}\pi^+\pi^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] = (3.30 \pm 0.71 \pm 0.59) \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = (7.4 \pm 0.5) \times 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(p\bar{p}\eta)/\Gamma_{\text{total}} \quad \Gamma_{9/\Gamma}$$

$$\text{VALUE (units 10}^{-4}) \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$7.4 \pm 2.1 \pm 0.5 \quad 20 \quad 1 \text{ ABLIKIM} \quad 22M \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 22M reports $[\Gamma(h_c(1P) \rightarrow p\bar{p}\eta)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] = (5.51 \pm 1.50 \pm 0.46) \times 10^{-7}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = (7.4 \pm 0.5) \times 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(\pi^+\pi^-\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{10/\Gamma}$$

$$\text{VALUE (units 10}^{-3}) \quad \text{CL\%} \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$1.9 \pm 0.5 \pm 0.1 \quad 101 \quad 1 \text{ ABLIKIM} \quad 19AG \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

• • • We do not use the following data for averages, fits, limits, etc. • • •

$$<2.6 \quad 90 \quad 2 \text{ ADAMS} \quad 09 \quad \text{CLEO} \quad \psi(2S) \rightarrow \pi^0 \gamma \eta_c$$

¹ ABLIKIM 19AG reports $[\Gamma(h_c(1P) \rightarrow \pi^+\pi^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] = (1.38 \pm 0.35 \pm 0.17) \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = (7.4 \pm 0.5) \times 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

² ADAMS 09 reports $[\Gamma(h_c(1P) \rightarrow \pi^+\pi^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 0.19 \times 10^{-5}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

$$\Gamma(\pi^+\pi^-\pi^0\eta)/\Gamma_{\text{total}} \quad \Gamma_{11/\Gamma}$$

$$\text{VALUE (units 10}^{-3}) \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$8.3 \pm 2.3 \pm 0.6 \quad 35 \quad 1 \text{ ABLIKIM} \quad 20AH \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 20AH reports $[\Gamma(h_c(1P) \rightarrow \pi^+\pi^-\pi^0\eta)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] = (6.2 \pm 1.6 \pm 0.7) \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = (7.4 \pm 0.5) \times 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(2\pi^+2\pi^-\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{12/\Gamma}$$

$$\text{VALUE (units 10}^{-2}) \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$0.94 \pm 0.17 \text{ OUR AVERAGE} \quad 254 \quad 1 \text{ ABLIKIM} \quad 19AG \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

$$0.86 \pm 0.16 \pm 0.06 \quad 254 \quad 1 \text{ ABLIKIM} \quad 19AG \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

$$2.5 \pm 0.9 \pm 0.2 \quad 92 \quad 2 \text{ ADAMS} \quad 09 \quad \text{CLEO} \quad \psi(2S) \rightarrow \pi^0 \gamma \eta_c$$

¹ ABLIKIM 19AG reports $[\Gamma(h_c(1P) \rightarrow 2\pi^+2\pi^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] = (6.40 \pm 0.81 \pm 0.87) \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = (7.4 \pm 0.5) \times 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

² ADAMS 09 reports $[\Gamma(h_c(1P) \rightarrow 2\pi^+2\pi^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] = (1.88 \pm 0.48 \pm 0.47) \times 10^{-5}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = (7.4 \pm 0.5) \times 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(3\pi^+3\pi^-\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{13/\Gamma}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<0.010 \quad 90 \quad 1 \text{ ABLIKIM} \quad 19AG \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

• • • We do not use the following data for averages, fits, limits, etc. • • •

$$<0.034 \quad 90 \quad 2 \text{ ADAMS} \quad 09 \quad \text{CLEO} \quad \psi(2S) \rightarrow \pi^0 \gamma \eta_c$$

¹ ABLIKIM 19AG reports $[\Gamma(h_c(1P) \rightarrow 3\pi^+3\pi^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 7.5 \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

² ADAMS 09 reports $[\Gamma(h_c(1P) \rightarrow 3\pi^+3\pi^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 2.5 \times 10^{-5}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

$$\Gamma(K^+K^-\pi^+\pi^-)/\Gamma_{\text{total}} \quad \Gamma_{14/\Gamma}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<7 \times 10^{-4} \quad 90 \quad 1 \text{ ABLIKIM} \quad 19AG \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 19AG reports $[\Gamma(h_c(1P) \rightarrow K^+K^-\pi^+\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 0.5 \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

$$\Gamma(K^+K^-\pi^+\pi^-\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{15/\Gamma}$$

$$\text{VALUE (units 10}^{-3}) \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$3.8 \pm 0.8 \pm 0.3 \quad 80 \quad 1 \text{ ABLIKIM} \quad 20AH \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 20AH reports $[\Gamma(h_c(1P) \rightarrow K^+K^-\pi^+\pi^-\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] = (2.8 \pm 0.5 \pm 0.3) \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = (7.4 \pm 0.5) \times 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$\Gamma(K^+K^-\pi^+\pi^-\pi^-)/\Gamma_{\text{total}} \quad \Gamma_{16/\Gamma}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<2.7 \times 10^{-3} \quad 90 \quad 20 \quad 1 \text{ ABLIKIM} \quad 20AH \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 20AH reports $[\Gamma(h_c(1P) \rightarrow K^+K^-\pi^+\pi^-\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 2.0 \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

$$\Gamma(K^+K^-\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{17/\Gamma}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<6 \times 10^{-4} \quad 90 \quad 20 \quad 1 \text{ ABLIKIM} \quad 20AH \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 20AH reports $[\Gamma(h_c(1P) \rightarrow K^+K^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 4.8 \times 10^{-7}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.

$$\Gamma(K^+K^-\pi^0\eta)/\Gamma_{\text{total}} \quad \Gamma_{18/\Gamma}$$

$$\text{VALUE} \quad \text{CL\%} \quad \text{EVTS} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT}$$

$$<2.4 \times 10^{-3} \quad 90 \quad 20 \quad 1 \text{ ABLIKIM} \quad 20AH \quad BES3 \quad \psi(2S) \rightarrow \pi^0 h_c(1P)$$

¹ ABLIKIM 20AH reports $[\Gamma(h_c(1P) \rightarrow K^+K^-\pi^0\eta)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow h_c(1P)\pi^0)] < 1.8 \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \rightarrow h_c(1P)\pi^0) = 7.4 \times 10^{-4}$.
$\Gamma(K^+ K^- \eta)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</th><th>CL<sub>1</sub></th><th>CL<sub>2</sub></th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;1.0 x 10<sup>-3</sup></td><td>90</td><td>18</td><td></td><td>1 ABLIKIM</td><td>20AH BES3</td><td>ψ(2S) → π<sup>0</sup>h<sub>c</sub>(1P)</td></tr></tbody></table>

1 ABLIKIM 20AH reports $[\Gamma(h_c(1P) → K^+ K^- \eta)/\Gamma_{\text{total}}] × [B(ψ(2S) → h_c(1P)π^0)] < 7.5 × 10^{-7}$ which we divide by our best value $B(ψ(2S) → h_c(1P)π^0) = 7.4 × 10^{-4}$.

$\Gamma(2K^+ 2K^- \pi^0)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</th><th>CL<sub>1</sub></th><th>CL<sub>2</sub></th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;2.8 x 10<sup>-4</sup></td><td>90</td><td>11</td><td></td><td>1 ABLIKIM</td><td>20AH BES3</td><td>ψ(2S) → π<sup>0</sup>h<sub>c</sub>(1P)</td></tr></tbody></table>

1 ABLIKIM 20AH reports $[\Gamma(h_c(1P) → 2K^+ 2K^- \pi^0)/\Gamma_{\text{total}}] × [B(ψ(2S) → h_c(1P)π^0)] < 2.1 × 10^{-7}$ which we divide by our best value $B(ψ(2S) → h_c(1P)π^0) = 7.4 × 10^{-4}$.

$\Gamma(K_S^0 K^\pm \pi^\mp)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</th><th>CL<sub>1</sub></th><th>CL<sub>2</sub></th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;6 x 10<sup>-4</sup></td><td>90</td><td>17</td><td></td><td>1 ABLIKIM</td><td>20AH BES3</td><td>ψ(2S) → π<sup>0</sup>h<sub>c</sub>(1P)</td></tr></tbody></table>

1 ABLIKIM 20AH reports $[\Gamma(h_c(1P) → K_S^0 K^\pm \pi^\mp)/\Gamma_{\text{total}}] × [B(ψ(2S) → h_c(1P)π^0)] < 4.8 × 10^{-7}$ which we divide by our best value $B(ψ(2S) → h_c(1P)π^0) = 7.4 × 10^{-4}$.

$\Gamma(K_S^0 K^\pm \pi^\mp \pi^+ \pi^-)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.2±1.0±0.2</td><td>41</td><td>1 ABLIKIM</td><td>20AH BES3</td><td>ψ(2S) → π<sup>0</sup>h<sub>c</sub>(1P)</td></tr></tbody></table>

1 ABLIKIM 20AH reports $[\Gamma(h_c(1P) → K_S^0 K^\pm \pi^\mp \pi^+ \pi^-)/\Gamma_{\text{total}}] × [B(ψ(2S) → h_c(1P)π^0)] = (2.4 ± 0.7 ± 0.3) × 10^{-6}$ which we divide by our best value $B(ψ(2S) → h_c(1P)π^0) = (7.4 ± 0.5) × 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

## RADIATIVE DECAYS

$\Gamma(\gamma\eta)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.7±1.5±1.4</td><td>18</td><td>ABLIKIM</td><td>16l</td><td>BES3 ψ(2S) → π<sup>0</sup>γη</td></tr></tbody></table>

$\Gamma(\gamma\eta'(958))/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.52±0.27±0.29</td><td>44</td><td>ABLIKIM</td><td>16l</td><td>BES3 ψ(2S) → π<sup>0</sup>γη'(958)</td></tr></tbody></table>

$\Gamma(\gamma\eta_c(1S))/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5"><strong>60 ± 4 OUR FIT</strong></td></tr></tbody></table>

### 57 ± 5 OUR AVERAGE

<table><thead><tr><th>57 ± 4 ± 4</th><th>23k</th><th>1 ABLIKIM</th><th>22AQ BES3</th><th>ψ(2S) → π<sup>0</sup> hadrons; π<sup>0</sup>γ(η<sub>c</sub>)</th></tr></thead><tbody><tr><td>56 ± 6 ± 4</td><td></td><td>2 DOBBS</td><td>08A CLEO</td><td>ψ(2S) → π<sup>0</sup>η<sub>c</sub>γ</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><thead><tr><th>62 ± 9 ± 4</th><th>3679</th><th>3,4 ABLIKIM</th><th>10B BES3</th><th>ψ(2S) → π<sup>0</sup>η<sub>c</sub>γ</th></tr></thead><tbody><tr><td>56 ± 7 ± 4</td><td>1282</td><td>5 DOBBS</td><td>08A CLEO</td><td>ψ(2S) → π<sup>0</sup>η<sub>c</sub>γ</td></tr><tr><td>54 ± 14 ± 4</td><td>168</td><td>6 ROSNER</td><td>05 CLEO</td><td>ψ(2S) → π<sup>0</sup>η<sub>c</sub>γ</td></tr></tbody></table>

1 ABLIKIM 22AQ reports $[\Gamma(h_c(1P) → γη_c(1S))/\Gamma_{\text{total}}] × [B(ψ(2S) → h_c(1P)π^0)] = (4.22^{+0.27}_{-0.26} ± 0.19) × 10^{-4}$ which we divide by our best value $B(ψ(2S) → h_c(1P)π^0) = (7.4 ± 0.5) × 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 Average of DOBBS 08A and ROSNER 05. DOBBS 08A reports $[\Gamma(h_c(1P) → γη_c(1S))/\Gamma_{\text{total}}] × [B(ψ(2S) → h_c(1P)π^0)] = (4.16^{+0.30}_{-0.37}) × 10^{-4}$ which we divide by our best value $B(ψ(2S) → h_c(1P)π^0) = (7.4 ± 0.5) × 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 ABLIKIM 10B reports $[\Gamma(h_c(1P) → γη_c(1S))/\Gamma_{\text{total}}] × [B(ψ(2S) → h_c(1P)π^0)] = (4.58^{+0.40}_{-0.50}) × 10^{-4}$ which we divide by our best value $B(ψ(2S) → h_c(1P)π^0) = (7.4 ± 0.5) × 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

4 Superseded by ABLIKIM 22AQ

5 DOBBS 08A reports $[\Gamma(h_c(1P) → γη_c(1S))/\Gamma_{\text{total}}] × [B(ψ(2S) → h_c(1P)π^0)] = (4.19^{+0.32}_{-0.45}) × 10^{-4}$ which we divide by our best value $B(ψ(2S) → h_c(1P)π^0) = (7.4 ± 0.5) × 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

6 ROSNER 05 reports $[\Gamma(h_c(1P) → γη_c(1S))/\Gamma_{\text{total}}] × [B(ψ(2S) → h_c(1P)π^0)] = (4.0 ± 0.8 ± 0.7) × 10^{-4}$ which we divide by our best value $B(ψ(2S) → h_c(1P)π^0) = (7.4 ± 0.5) × 10^{-4}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

## $h_c(1P)$ REFERENCES

ABLIKIM 22AQ PR D106 072007 M. Ablikim et al. (BESIII Collab.)

ABLIKIM 22M JHEP 2205 108 M. Ablikim et al. (BESIII Collab.)

Also JHEP 2303 022 (errat.) M. Ablikim et al. (BESIII Collab.)

ABLIKIM 22N JHEP 2205 003 M. Ablikim et al. (BESIII Collab.)

ABLIKIM 20AH PR D102 112007 M. Ablikim et al. (BESIII Collab.)

ABLIKIM 19AG PR D99 072008 M. Ablikim et al. (BESIII Collab.)

ABLIKIM 18M PR D97 052008 M. Ablikim et al. (BESIII Collab.)

ABLIKIM 16l PRL 116 251802 M. Ablikim et al. (BESIII Collab.)

ABLIKIM 13V PR D88 112001 M. Ablikim et al. (BESIII Collab.)

ABLIKIM 12N PR D86 092009 M. Ablikim et al. (BESIII Collab.)

ABLIKIM 10B PRL 104 132002 M. Ablikim et al. (BESIII Collab.)

$\Gamma_{19}/\Gamma$

ADAMS 09 PR D80 051106 G.S. Adams et al. (CLEO Collab.)

DOBBS 08A PRL 101 182003 M. Dobbs et al. (CLEO Collab.)

ANDREOTTI 05B PR D72 032001 M. Andreotti et al. (FNAL E835 Collab.)

ROSNER 05 PRL 95 102003 J.L. Rosner et al. (CLEO Collab.)

AULCHENKO 03 PL B573 63 V.M. Aulchenko et al. (KEDR Collab.)

ANTONIAZZI 94 PR D50 4258 L. Antoniazzio et al. (E705 Collab.)

ARMSTRONG 93B PR D47 772 T.A. Armstrong et al. (FNAL E760 Collab.)

ARMSTRONG 92D PRL 69 2337 T.A. Armstrong et al. (FNAL E760 Collab.)

BAGLIN 86 PL B171 135 C. Baglin et al. (LAPP, CERN, TORI, STRB+)

$\chi_{c2}(1P)$

$$I^G(J^{PC}) = 0^{+}(2^{++})$$

See the Review on "Branching Ratios of $\psi(2S)$, $\chi_{c0,1,2}$ and $\eta_c(1S)$" before the $\chi_{c0}(1P)$ Listings.

## $\chi_{c2}(1P)$ MASS

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3556.17 ± 0.07</td><td>OUR AVERAGE</td><td></td><td></td><td></td></tr><tr><td>3557.3 ± 1.7 ± 0.7</td><td>611</td><td>1 AAIJ</td><td>17BB LHCB</td><td>pp → bπ<sub>2</sub>X → 2(K<sup>+</sup> K<sup>-</sup>)X</td></tr><tr><td>3556.10 ± 0.06 ± 0.11</td><td>4.0k</td><td>2 AAIJ</td><td>17BI LHCB</td><td>χ<sub>c2</sub> → J/ψµ<sup>+</sup>µ<sup>-</sup></td></tr><tr><td>3555.3 ± 0.6 ± 2.2</td><td>2.5k</td><td>UEHARA</td><td>08 BELL</td><td>γ → hadrons</td></tr><tr><td>3555.70 ± 0.59 ± 0.39</td><td></td><td>ABLIKIM</td><td>05G BES2</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr><tr><td>3556.173 ± 0.123 ± 0.020</td><td></td><td>ANDREOTTI</td><td>05A E835</td><td>pπ → e<sup>+</sup>e<sup>-</sup>γ</td></tr><tr><td>3559.9 ± 2.9</td><td></td><td>EISENSTEIN</td><td>01 CLE2</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup>χ<sub>c2</sub></td></tr><tr><td>3556.4 ± 0.7</td><td></td><td>BAI</td><td>99B BES</td><td>ψ(2S) → γX</td></tr><tr><td>3556.22 ± 0.131 ± 0.020</td><td>585</td><td>3 ARMSTRONG</td><td>92 E760</td><td>pπ → e<sup>+</sup>e<sup>-</sup>γ</td></tr><tr><td>3556.9 ± 0.4 ± 0.5</td><td>50</td><td>BAGLIN</td><td>86B SPEC</td><td>pπ → e<sup>+</sup>e<sup>-</sup>X</td></tr><tr><td>3557.8 ± 0.2 ± 4</td><td></td><td>4 GAISER</td><td>86 CBAL</td><td>ψ(2S) → γX</td></tr><tr><td>3553.4 ± 2.2</td><td>66</td><td>5 LEMOIGNE</td><td>82 GOLI</td><td>185 π<sup>-</sup> Be → γµ<sup>+</sup> µ<sup>-</sup> A</td></tr><tr><td>3555.9 ± 0.7</td><td></td><td>6 OREGLIA</td><td>82 CBAL</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ2γ</td></tr><tr><td>3557 ± 1.5</td><td>69</td><td>7 HIMEL</td><td>80 MRK2</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ2γ</td></tr><tr><td>3551 ± 11</td><td>15</td><td>BRANDELIK</td><td>79B DASP</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ2γ</td></tr><tr><td>3553 ± 4</td><td></td><td>7 BARTEL</td><td>78B CNTR</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ2γ</td></tr><tr><td>3553 ± 4 ± 4</td><td></td><td>7,8 TANENBAUM</td><td>78 MRK1</td><td>e<sup>+</sup>e<sup>-</sup></td></tr><tr><td>3563 ± 7</td><td>360</td><td>7 BIDDICK</td><td>77 CNTR</td><td>e<sup>+</sup>e<sup>-</sup> → γX</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><tbody><tr><td>3555.4 ± 1.3</td><td>53</td><td>UEHARA</td><td>13 BELL</td><td>γγ → K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr><tr><td>3543 ± 10</td><td>4</td><td>WHITAKER</td><td>76 MRK1</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ2γ</td></tr></tbody></table>

1 From a fit of the $\phi\phi$ invariant mass with the width of $\chi_{c2}(1P)$ fixed to the PDG 16 value.

2 AAIJ 17BI reports also $m(\chi_{c2}) - m(\chi_{c1}) = 45.39 \pm 0.07 \pm 0.03$ MeV.

3 Recalculated by ANDREOTTI 05A, using the value of $\psi(2S)$ mass from AULCHENKO 03.

4 Using mass of $\psi(2S) = 3686.0$ MeV.

5 J/ψ(1S) mass constrained to 3097 MeV.

6 Assuming $\psi(2S)$ mass = 3686 MeV and $J/ψ(1S)$ mass = 3097 MeV.

7 Mass value shifted by us by amount appropriate for $\psi(2S)$ mass = 3686 MeV and $J/ψ(1S)$ mass = 3097 MeV.

8 From a simultaneous fit to radiative and hadronic decay channels.

## $\chi_{c2}(1P)$ WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.98 ± 0.09</td><td>OUR FIT</td><td></td><td></td><td>Error includes scale factor of 1.1.</td></tr></tbody></table>

### 2.00 ± 0.11 OUR AVERAGE

<table><tbody><tr><td>2.10 ± 0.20 ± 0.02</td><td>4.0k</td><td>AAIJ</td><td>17BI LHCB</td><td>χ<sub>c2</sub> → J/ψµ<sup>+</sup>µ<sup>-</sup></td></tr><tr><td>1.915 ± 0.188 ± 0.013</td><td></td><td>ANDREOTTI</td><td>05A E835</td><td>pπ → e<sup>+</sup>e<sup>-</sup>γ</td></tr><tr><td>1.96 ± 0.17 ± 0.07</td><td>585</td><td>1 ARMSTRONG</td><td>92 E760</td><td>pπ → e<sup>+</sup>e<sup>-</sup>γ</td></tr><tr><td>2.6 ± 1.4</td><td>50</td><td>BAGLIN</td><td>86B SPEC</td><td>pπ → e<sup>+</sup>e<sup>-</sup>X</td></tr><tr><td>2.8 ± 2.1</td><td></td><td>2 GAISER</td><td>86 CBAL</td><td>ψ(2S) → γX</td></tr></tbody></table>

1 Recalculated by ANDREOTTI 05A.

2 Errors correspond to 90% confidence level; authors give only width range.

## $\chi_{c2}(1P)$ DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>f</sub>/Γ)</th><th>Scale factor/<br>Confidence level</th></tr></thead><tbody><tr><td colspan="3"><strong>Hadronic decays</strong></td></tr><tr><td>Γ<sub>1</sub></td><td>2(π<sup>+</sup>π<sup>-</sup>)</td><td>S=1.4</td></tr><tr><td>Γ<sub>2</sub></td><td>ρρ</td><td></td></tr><tr><td>Γ<sub>3</sub></td><td>π<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td>(1.86 ± 0.24) %</td></tr><tr><td>Γ<sub>4</sub></td><td>ρ<sup>+</sup>π<sup>-</sup>π<sup>0</sup> + c.c.</td><td>(2.22 ± 0.35) %</td></tr><tr><td>Γ<sub>5</sub></td><td>4π<sup>0</sup></td><td>(1.13 ± 0.15) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>6</sub></td><td>K<sup>+</sup>K<sup>-</sup>π<sup>0</sup></td><td>(2.1 ± 0.4) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>7</sub></td><td>K<sup>+</sup>π<sup>-</sup>K<sup>0</sup>π<sup>0</sup> + c.c.</td><td>(1.41 ± 0.20) %</td></tr><tr><td>Γ<sub>8</sub></td><td>ρ<sup>-</sup>K<sup>+</sup>K<sup>0</sup> + c.c.</td><td>(4.2 ± 1.3) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>9</sub></td><td>K<sup>+</sup>(892)0 K<sup>-</sup>π<sup>+</sup> → K<sup>-</sup>π<sup>+</sup>K<sup>0</sup>π<sup>0</sup> + c.c.</td><td>(3.0 ± 0.8) × 10<sup>-3</sup></td></tr><tr><td>Γ<sub>10</sub></td><td>K<sup>+</sup>(892)0 K<sup>0</sup>π<sup>0</sup> → K<sup>+</sup>π<sup>-</sup>K<sup>0</sup>π<sup>0</sup> + c.c.</td><td>(3.9 ± 0.9) × 10<sup>-3</sup></td></tr></tbody></table>
$\Gamma_{11} \quad K^+(892)^- K^+ \pi^0 \to K^+ \pi^- \bar{K}^0 \pi^0 + \text{c.c.}$ (3.8 ± 0.8) × 10⁻³

$\Gamma_{12} \quad K^+(892)^+ K^- \pi^0 \to K^+ \pi^- \bar{K}^0 \pi^0 + \text{c.c.}$ (3.0 ± 0.8) × 10⁻³

$\Gamma_{13} \quad K^+ K^- \eta \pi^0$ (1.3 ± 0.4) × 10⁻³

$\Gamma_{14} \quad K^+ K^- \pi^+ \pi^-$ (8.3 ± 1.1) × 10⁻³

$\Gamma_{15} \quad K^+ K^- \pi^+ \pi^- \pi^0$ (1.17 ± 0.13) %

$\Gamma_{16} \quad K_S^0 K^\pm \pi^\mp \pi^\mp$ (7.3 ± 0.8) × 10⁻³

$\Gamma_{17} \quad K^+ \bar{K}^* (892)^0 \pi^- + \text{c.c.}$ (2.1 ± 1.0) × 10⁻³

$\Gamma_{18} \quad K^*(892)^0 \bar{K}^* (892)^0$ (2.2 ± 0.9) × 10⁻³

$\Gamma_{19} \quad 3(\pi^+ \pi^-)$ (1.53 ± 0.19) %

$\Gamma_{20} \quad \phi\phi$ (1.23 ± 0.07) × 10⁻³

$\Gamma_{21} \quad \phi\phi\eta$ (5.4 ± 0.7) × 10⁻⁴

$\Gamma_{22} \quad \omega\omega$ (8.6 ± 1.0) × 10⁻⁴

$\Gamma_{23} \quad \omega K^+ K^-$ (7.3 ± 0.9) × 10⁻⁴

$\Gamma_{24} \quad \omega\phi$ (9.7 ± 2.8) × 10⁻⁶

$\Gamma_{25} \quad \pi\pi$ (2.27 ± 0.10) × 10⁻³

$\Gamma_{26} \quad \rho^0 \pi^+ \pi^-$ (3.6 ± 1.5) × 10⁻³

$\Gamma_{27} \quad \pi^+ \pi^- \pi^0$ (non-resonant) (2.0 ± 0.4) × 10⁻⁵

$\Gamma_{28} \quad \rho(770)^\pm \pi^\mp$ (6 ± 4) × 10⁻⁶

$\Gamma_{29} \quad \pi^+ \pi^- \eta$ (4.9 ± 1.3) × 10⁻⁴

$\Gamma_{30} \quad \pi^+ \pi^- \eta'$ (5.1 ± 1.9) × 10⁻⁴

$\Gamma_{31} \quad \eta\eta$ (5.5 ± 0.5) × 10⁻⁴

$\Gamma_{32} \quad K^+ K^-$ (1.02 ± 0.15) × 10⁻³

$\Gamma_{33} \quad K_S^0 K_S^0$ (5.3 ± 0.4) × 10⁻⁴

$\Gamma_{34} \quad K^*(892)^\pm K^\mp$ (1.46 ± 0.21) × 10⁻⁴

$\Gamma_{35} \quad K^*(892)^0 \bar{K}^0 + \text{c.c.}$ (1.27 ± 0.27) × 10⁻⁴

$\Gamma_{36} \quad K_S^2 (1430)^\pm K^\mp$ (1.51 ± 0.13) × 10⁻³

$\Gamma_{37} \quad K_S^2 (1430)^0 \bar{K}^0 + \text{c.c.}$ (1.27 ± 0.17) × 10⁻³

$\Gamma_{38} \quad K_S^3 (1780)^\pm K^\mp$ (5.3 ± 0.8) × 10⁻⁴

$\Gamma_{39} \quad K_S^3 (1780)^0 \bar{K}^0 + \text{c.c.}$ (5.7 ± 2.1) × 10⁻⁴

$\Gamma_{40} \quad \partial_2 (1320)^0 \pi^0$ (1.31 ± 0.35) × 10⁻³

$\Gamma_{41} \quad \partial_2 (1320)^\pm \pi^\mp$ (1.8 ± 0.6) × 10⁻³

$\Gamma_{42} \quad \bar{K}^0 K^+ \pi^- + \text{c.c.}$ (1.30 ± 0.19) × 10⁻³

$\Gamma_{43} \quad K^+ K^- \pi^0$ (3.1 ± 0.8) × 10⁻⁴

$\Gamma_{44} \quad K^+ K^- \eta$ < 3.3 × 10⁻⁴ CL=90%

$\Gamma_{45} \quad K^+ K^- \eta'$ (958) (1.94 ± 0.34) × 10⁻⁴

$\Gamma_{46} \quad \eta\eta'$ (2.2 ± 0.5) × 10⁻⁵

$\Gamma_{47} \quad \eta'\eta'$ (4.6 ± 0.6) × 10⁻⁵

$\Gamma_{48} \quad \pi^+ \pi^- K_S^0 K_S^0$ (2.2 ± 0.5) × 10⁻³

$\Gamma_{49} \quad K^+ K^- K_S^0 K_S^0$ < 4 × 10⁻⁴ CL=90%

$\Gamma_{50} \quad K_S^0 K_S^0 K_S^0 K_S^0$ (1.15 ± 0.18) × 10⁻⁴

$\Gamma_{51} \quad K^+ K^- K^+ K^-$ (1.67 ± 0.22) × 10⁻³

$\Gamma_{52} \quad K^+ K^- \phi$ (1.45 ± 0.30) × 10⁻³

$\Gamma_{53} \quad \bar{K}^0 K^+ \pi^- \phi + \text{c.c.}$ (4.8 ± 0.7) × 10⁻³

$\Gamma_{54} \quad K^+ K^- \pi^0 \phi$ (2.7 ± 0.5) × 10⁻³

$\Gamma_{55} \quad \phi \pi^+ \pi^- \pi^0$ (9.3 ± 1.2) × 10⁻⁴

$\Gamma_{56} \quad \rho \bar{p}$ (7.3 ± 0.4) × 10⁻⁵

$\Gamma_{57} \quad \rho \bar{p} \pi^0$ (4.7 ± 0.4) × 10⁻⁴

$\Gamma_{58} \quad \rho \bar{p} \eta$ (1.77 ± 0.25) × 10⁻⁴

$\Gamma_{59} \quad \rho \bar{p} \omega$ (3.7 ± 0.4) × 10⁻⁴

$\Gamma_{60} \quad \rho \bar{p} \phi$ (2.8 ± 0.9) × 10⁻⁵

$\Gamma_{61} \quad \rho \bar{p} \pi^+ \pi^-$ (1.32 ± 0.34) × 10⁻³

$\Gamma_{62} \quad \rho \bar{p} \pi^0 \pi^0$ (8.0 ± 2.4) × 10⁻⁴

$\Gamma_{63} \quad \bar{K}^0 K^+ K^- (\text{non-resonant})$ (1.94 ± 0.33) × 10⁻⁴

$\Gamma_{64} \quad \rho \bar{p} K_S^0 K_S^0$ < 7.9 × 10⁻⁴ CL=90%

$\Gamma_{65} \quad \rho \pi^- \pi^-$ (8.7 ± 1.0) × 10⁻⁴

$\Gamma_{66} \quad \bar{p} \pi^+ \pi^+$ (9.1 ± 0.8) × 10⁻⁴

$\Gamma_{67} \quad \rho \pi^- \pi^0$ (2.21 ± 0.18) × 10⁻³

$\Gamma_{68} \quad \bar{p} \pi^+ \pi^0$ (2.15 ± 0.19) × 10⁻³

$\Gamma_{69} \quad \Lambda \bar{\Lambda}$ (1.86 ± 0.16) × 10⁻⁴

$\Gamma_{70} \quad \Lambda \bar{\Lambda} \pi^+ \pi^-$ (1.28 ± 0.16) × 10⁻³

$\Gamma_{71} \quad \Lambda \bar{\Lambda} \pi^+ \pi^- (\text{non-resonant})$ (6.7 ± 1.5) × 10⁻⁴

$\Gamma_{72} \quad \Sigma (1385)^+ \bar{\Lambda} \pi^+ + \text{c.c.}$ < 4 × 10⁻⁴ CL=90%

$\Gamma_{73} \quad \Sigma (1385)^- \bar{\Lambda} \pi^+ + \text{c.c.}$ < 6 × 10⁻⁴ CL=90%

$\Gamma_{74} \quad \Lambda \bar{\Lambda} \eta$ (1.07 ± 0.26) × 10⁻⁴

$\Gamma_{75} \quad K^+ \bar{p} \Lambda + \text{c.c.}$ (7.9 ± 0.6) × 10⁻⁴

$\Gamma_{76} \quad n K_S^0 \bar{\Lambda} + \text{c.c.}$ (3.64 ± 0.29) × 10⁻⁴

$\Gamma_{77} \quad K^*(892)^- \bar{p} \Lambda + \text{c.c.}$ (8.3 ± 1.2) × 10⁻⁴

$\Gamma_{78} \quad K^+ \bar{p} \Lambda (1520) + \text{c.c.}$ (2.9 ± 0.7) × 10⁻⁴

$\Gamma_{79} \quad \Lambda (1520) \bar{\Lambda} (1520)$ (4.7 ± 1.5) × 10⁻⁴

$\Gamma_{80} \quad \Sigma^0 \Sigma^0$ (3.7 ± 0.6) × 10⁻⁵

$\Gamma_{81} \quad \Sigma^+ \bar{p} K_S^0 + \text{c.c.}$ (8.4 ± 1.0) × 10⁻⁵

$\Gamma_{82} \quad \Sigma^0 \bar{p} K^+ + \text{c.c.}$ (9.3 ± 0.8) × 10⁻⁵

$\Gamma_{83} \quad \Sigma^+ \Sigma^- \bar{p}$ (3.4 ± 0.7) × 10⁻⁵

S=1.2

S=2.3

S=1.9

S=2.3

$\Gamma_{84} \quad \Sigma^- \Sigma^+$ (4.5 ± 1.8) × 10⁻⁵ CL=90%

$\Gamma_{85} \quad \Sigma (1385)^+ \Sigma (1385)^-$ < 1.6 × 10⁻⁴ CL=90%

$\Gamma_{86} \quad \Sigma (1385)^- \Sigma (1385)^+$ < 8 × 10⁻⁵ CL=90%

$\Gamma_{87} \quad K^- \Lambda \Xi^+ + \text{c.c.}$ (1.80 ± 0.32) × 10⁻⁴

$\Gamma_{88} \quad \Xi^0 \Xi^0$ (1.86 ± 0.22) × 10⁻⁴

$\Gamma_{89} \quad \Xi^- \Xi^+$ (1.46 ± 0.12) × 10⁻⁴

$\Gamma_{90} \quad \Omega^- \Omega^+$ (4.52 ± 0.30) × 10⁻⁵ CL=90%

$\Gamma_{91} \quad J/\psi(1S) \pi^+ \pi^- \pi^0$ < 1.5 % CL=90%

$\Gamma_{92} \quad \pi^0 \eta_c$ < 3.2 × 10⁻³ CL=90%

$\Gamma_{93} \quad \eta_c(1S) \pi^+ \pi^-$ < 5.4 × 10⁻³ CL=90%

Radiative decays

$\Gamma_{94} \quad \gamma J/\psi(1S)$ (19.5 ± 0.8) % S=1.5

$\Gamma_{95} \quad \gamma \rho^0$ < 1.9 × 10⁻⁵ CL=90%

$\Gamma_{96} \quad \gamma \omega$ < 6 × 10⁻⁶ CL=90%

$\Gamma_{97} \quad \gamma \phi$ < 8 × 10⁻⁶ CL=90%

$\Gamma_{98} \quad \gamma \gamma$ (2.92 ± 0.12) × 10⁻⁴ S=1.3

$\Gamma_{99} \quad e^+ e^- J/\psi(1S)$ (2.20 ± 0.15) × 10⁻³

$\Gamma_{100} \quad \mu^+ \mu^- J/\psi(1S)$ (2.07 ± 0.34) × 10⁻⁴

CONSTRAINED FIT INFORMATION

A multiparticle fit to $\chi_{c1}(1P)$, $\chi_{c0}(1P)$, $\chi_{c2}(1P)$, and $\psi(2S)$ with 4 total widths, a partial width, 25 combinations of partial widths obtained from integrated cross section, and 86 branching ratios uses 253 measurements to determine 49 parameters. The overall fit has a $\chi^2 = 389.6$ for 204 degrees of freedom.

The following off-diagonal array elements are the correlation coefficients $\langle \delta p_i \delta p_j \rangle / (\delta p_i \delta p_j)$, in percent, from the fit to parameters $p_i$, including the branching fractions, $x_i \equiv \Gamma_i / \Gamma_{\text{total}}$.

<table><tbody><tr><td>x<sub>14</sub></td><td>7</td></tr><tr><td>x<sub>17</sub></td><td>2 26</td></tr><tr><td>x<sub>18</sub></td><td>2 2 0</td></tr><tr><td>x<sub>20</sub></td><td>4 4 1 1</td></tr><tr><td>x<sub>25</sub></td><td>4 4 1 2 5</td></tr><tr><td>x<sub>26</sub></td><td>26 2 1 1 1</td></tr><tr><td>x<sub>31</sub></td><td>2 2 0 1 3</td></tr><tr><td>x<sub>32</sub></td><td>3 3 1 1 2</td></tr><tr><td>x<sub>33</sub></td><td>3 3 1 1 3</td></tr><tr><td>x<sub>42</sub></td><td>1 1 0 1 2 8</td></tr><tr><td>x<sub>51</sub></td><td>3 3 1 1 2 3 9</td></tr><tr><td>x<sub>56</sub></td><td>6 6 1 2 4 12</td></tr><tr><td>x<sub>69</sub></td><td>2 2 0 1 3 15 0</td></tr><tr><td>x<sub>94</sub></td><td>12 12 3 3 9 25 4 13 8 15</td></tr><tr><td>x<sub>98</sub></td><td>-10 -10 -3 -1 -3 19 -3 12 1 9</td></tr><tr><td>&Gamma;</td><td>-18 -18 -5 -12 -26 -6 -13 -10 -16</td></tr></tbody></table>

<table><tbody><tr><td>x<sub>51</sub></td><td>3</td></tr><tr><td>x<sub>56</sub></td><td>4 5</td></tr><tr><td>x<sub>69</sub></td><td>4 4 6</td></tr><tr><td>x<sub>94</sub></td><td>7 10 -12 12</td></tr><tr><td>x<sub>98</sub></td><td>6 2 2 27 11 11</td></tr><tr><td>&Gamma;</td><td>-8 -12 -42 -13 -48 -47</td></tr><tr><td>x<sub>42</sub></td><td>x<sub>51</sub> x<sub>56</sub> x<sub>69</sub> x<sub>94</sub> x<sub>98</sub></td></tr></tbody></table>

$\chi_{c2}(1P)$ PARTIAL WIDTHS

$\chi_{c2}(1P) \Gamma(i) \Gamma(\gamma J/\psi(1S)) / \Gamma(\text{total})$

$$ \Gamma(\rho\bar{p}) \times \Gamma(\gamma J/\psi(1S)) / \Gamma_{\text{total}} \quad \Gamma_{56} \Gamma_{94} / \Gamma $$

VALUE (eV) DOCUMENT ID TECN COMMENT

28.0 ± 1.3 OUR FIT Error includes scale factor of 1.1.

27.5 ± 1.5 OUR AVERAGE

27.0 ± 1.5 ± 1.1 1 ANDREOTTI 05A E835 $p\bar{p} \to e^+ e^-$

27.7 ± 1.5 ± 2.0 1,2 ARMSTRONG 92 E760 $\bar{p}p \to e^+ e^-$

36 ± 8 1 BAGLIN 86B SPEC $\bar{p}p \to e^+ e^- X$

¹Calculated by us using $B(J/\psi(1S) \to e^+ e^-) = 0.0593 \pm 0.0010$.

²Recalculated by ANDREOTTI 05A.

$$ \Gamma(\gamma\gamma) \times \Gamma(\gamma J/\psi(1S)) / \Gamma_{\text{total}} \quad \Gamma_{98} \Gamma_{94} / \Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT

113 ± 5 OUR FIT Error includes scale factor of 1.3.

123 ± 6 OUR AVERAGE

124.1 ± 2.5 ± 5.9 4960 1 SEINO 23 BELL $e^+ e^- \to e^+ e^- \chi_{c2}$

111 ± 12 ± 9 147 2 DOBBS 06 CLE3 $e^+ e^- \to e^+ e^- \chi_{c2}$