# Meson Particle Listings

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

<table><tr><td>139</td><td>± 55</td><td>± 21</td><td>2,3</td><td>ACCIARRI</td><td>99E</td><td>L3</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup>χ<sub>c2</sub></td></tr><tr><td>242</td><td>± 65</td><td>± 51</td><td>2,4</td><td>ACKER...K...</td><td>98</td><td>OPAL</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup>χ<sub>c2</sub></td></tr><tr><td>150</td><td>± 42</td><td>± 36</td><td>2,5</td><td>DOMINICK</td><td>94</td><td>CLE2</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup>χ<sub>c2</sub></td></tr><tr><td>470</td><td>± 240</td><td>± 120</td><td>2,6</td><td>BAUER</td><td>93</td><td>TPC</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup>χ<sub>c2</sub></td></tr></table>

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

<table><tr><td>114</td><td>± 11</td><td>± 9</td><td>136</td><td>2,7</td><td>ABE</td><td>02T</td><td>BELL</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup>χ<sub>c2</sub></td></tr></table>

¹Calculated from the measured $\Gamma_{\gamma\gamma} \times B(\chi_{c2}(1S) \to \gamma J/\psi(1S)) \times B(J/\psi(1S) \to \ell^+\ell^-) = 14.8 \pm 0.3 \pm 0.7$ eV, using $B(J/\psi(1S) \to \ell^+\ell^-) = 11.93 \pm 0.05\%$.

²Calculated by us using $B(J/\psi \to \ell^+\ell^-) = 0.1187 \pm 0.0008$.

³The value for $\Gamma(\chi_{c2} \to \gamma\gamma)$ reported in ACCIARRI 99E is derived using $B(\chi_{c2} \to \gamma J/\psi(1S)) \times B(J/\psi(1S) \to \ell^+\ell^-) = 0.0162 \pm 0.0014$.

⁴The value for $\Gamma(\chi_{c2} \to \gamma\gamma)$ reported in ACKERSTAFF, K 98 is derived using $B(\chi_{c2} \to \gamma J/\psi(1S)) = 0.135 \pm 0.011$ and $B(J/\psi(1S) \to \ell^+\ell^-) = 0.1203 \pm 0.0038$.

⁵The value for $\Gamma(\chi_{c2} \to \gamma\gamma)$ reported in DOMINICK 94 is derived using $B(\chi_{c2} \to \gamma J/\psi(1S)) = 0.135 \pm 0.011$, $B(J/\psi(1S) \to e^+e^-) = 0.0627 \pm 0.0020$, and $B(J/\psi(1S) \to \mu^+\mu^-) = 0.0597 \pm 0.0025$.

⁶The value for $\Gamma(\chi_{c2} \to \gamma\gamma)$ reported in BAUER 93 is derived using $B(\chi_{c2} \to \gamma J/\psi(1S)) = 0.135 \pm 0.011$, $B(J/\psi(1S) \to e^+e^-) = 0.0627 \pm 0.0020$, and $B(J/\psi(1S) \to \mu^+\mu^-) = 0.0597 \pm 0.0025$.

⁷All systematic errors added in quadrature. Superseded by SEINO 23.

### $\chi_{c2}(1P) \Gamma(\ell)\Gamma(\gamma\gamma)/\Gamma(\text{total})$

$$ \Gamma(2(\pi^+\pi^-)) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{1\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ1Γ98/Γ

5.8 ±0.7 OUR FIT Error includes scale factor of 1.4.

5.2 ±0.7 OUR AVERAGE

5.01±0.44±0.55 1597±138 UEHARA 08 BELL $\gamma\gamma \to \chi_{c2} \to 2(\pi^+\pi^-)$

6.4 ±1.8 ±0.8 EISENSTEIN 01 CLE2 $e^+e^- \to e^+e^- \chi_{c2}$

$$ \Gamma(\rho\rho) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{2\Gamma 98}/\Gamma $$

VALUE (eV) CL% EVTS DOCUMENT ID TECN COMMENT Γ2Γ98/Γ

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

<7.8 90 <598 UEHARA 08 BELL $\gamma\gamma \to \chi_{c2} \to 2(\pi^+\pi^-)$

$$ \Gamma(K^+K^-\pi^+\pi^-) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{14\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ14Γ98/Γ

4.8 ±0.6 OUR FIT Error includes scale factor of 1.2.

4.42±0.42±0.53 780 ± 74 UEHARA 08 BELL $\gamma\gamma \to \chi_{c2} \to K^+K^-\pi^+\pi^-$

$$ \Gamma(K^+K^-\pi^+\pi^-\pi^0) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{15\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ15Γ98/Γ
6.5±0.9±1.5 1250 DEL-AMO-SA..11M BABR $\gamma\gamma \to K^+K^-\pi^+\pi^-\pi^0$

$$ \Gamma(K^*(892)^0\bar{K}^*(892)^0) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{18\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ18Γ98/Γ

1.3±0.5 OUR FIT Error includes scale factor of 2.3.

0.8±0.17±0.27 151 ± 30 UEHARA 08 BELL $\gamma\gamma \to \chi_{c2} \to K^+K^-\pi^+\pi^-$

$$ \Gamma(\phi\phi) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{20\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ20Γ98/Γ

0.71±0.05 OUR FIT Error includes scale factor of 1.5.

0.62±0.07±0.05 89 ± 11 LIU 12B BELL $\gamma\gamma \to 2(K^+K^-)$

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

0.58±0.18±0.16 26.5 ± 8.1 UEHARA 08 BELL $\gamma\gamma \to \chi_{c2} \to 2(K^+K^-)$

¹Supersedes UEHARA 08. Using $B(\phi \to K^+K^-) = (48.9 \pm 0.5)\%$.

$$ \Gamma(\omega\omega) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{22\Gamma 98}/\Gamma $$

VALUE (eV) CL% DOCUMENT ID TECN COMMENT Γ22Γ98/Γ

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

<0.64 90 1 LIU 12B BELL $\gamma\gamma \to 2(\pi^+\pi^-\pi^0)$

¹Using $B(\omega \to \pi^+\pi^-\pi^0) = (89.2 \pm 0.7)\%$.

$$ \Gamma(\omega\phi) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{24\Gamma 98}/\Gamma $$

VALUE (eV) CL% DOCUMENT ID TECN COMMENT Γ24Γ98/Γ

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

<0.04 90 1 LIU 12B BELL $\gamma\gamma \to K^+K^-\pi^+\pi^-\pi^0$

¹Using $B(\phi \to K^+K^-) = (48.9 \pm 0.5)\%$ and $B(\omega \to \pi^+\pi^-\pi^0) = (89.2 \pm 0.7)\%$.

$$ \Gamma(\pi\pi) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{25\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ25Γ98/Γ

1.31±0.08 OUR FIT Error includes scale factor of 1.2.

1.18±0.25 OUR AVERAGE

1.44±0.54±0.47 34 ± 13 UEHARA 09 BELL $10.6 e^+e^- \to e^+e^-\pi^0\pi^0$

1.14±0.21±0.17 54 ± 10 2 NAKAZAWA 05 BELL $10.6 e^+e^- \to e^+e^-\pi^+\pi^-$

¹We multiplied the measurement by 3 to convert from $\pi^0\pi^0$ to $\pi\pi$. Interference with the continuum included.

²We have multiplied $\pi^+\pi^-$ measurement by 3/2 to obtain $\pi\pi$.

$$ \Gamma(\rho^0\pi^+\pi^-) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{26\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ26Γ98/Γ

2.1±0.9 OUR FIT 986 ± 578 UEHARA 08 BELL $\gamma\gamma \to \chi_{c2} \to 2(\pi^+\pi^-)$

$$ \Gamma(\eta\eta) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{31\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ31Γ98/Γ

0.53±0.22±0.09 8 1 UEHARA 10A BELL $10.6 e^+e^- \to e^+e^-\eta\eta$

¹Interference with the continuum not included.

$$ \Gamma(K^+K^-) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{32\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ32Γ98/Γ

0.59±0.09 OUR FIT Error includes scale factor of 2.1.

0.44±0.11±0.07 33 ± 8 NAKAZAWA 05 BELL $10.6 e^+e^- \to e^+e^-K^+K^-$

$$ \Gamma(K_S^0K_S^0) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{33\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ33Γ98/Γ

0.307±0.026 OUR FIT Error includes scale factor of 1.1.

0.27 ±0.07 ±0.03 53 1 UEHARA 13 BELL $\gamma\gamma \to K_S^0K_S^0$

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

0.31 ±0.05 ±0.03 38 ± 7 CHEN 07B BELL $e^+e^- \to e^+e^-\chi_{c2}$

¹Supersedes CHEN 07B.

$$ \Gamma(\bar{K}^0K^+\pi^- + \text{c.c.}) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{42\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ42Γ98/Γ

0.75±0.11 OUR FIT 126 1 DEL-AMO-SA..11M BABR $\gamma\gamma \to K_S^0K_S^0\pi^\mp$

1.20±0.33±0.13 126 1 DEL-AMO-SA..11M BABR $\gamma\gamma \to K_S^0K_S^0\pi^\mp$

¹We have multiplied $\bar{K}K\pi$ by 2/3 to obtain $\bar{K}^0K^+\pi^- + \text{c.c.}$

$$ \Gamma(K^+K^-K^+K^-) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{51\Gamma 98}/\Gamma $$

VALUE (eV) EVTS DOCUMENT ID TECN COMMENT Γ51Γ98/Γ

0.97±0.13 OUR FIT Error includes scale factor of 1.1.

1.10±0.21±0.15 126 ± 24 UEHARA 08 BELL $\gamma\gamma \to \chi_{c2} \to 2(K^+K^-)$

$$ \Gamma(\eta_c(1S)\pi^+\pi^-) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{93\Gamma 98}/\Gamma $$

VALUE (eV) CL% DOCUMENT ID TECN COMMENT Γ93Γ98/Γ

<15.7 90 LEES 12AE BABR $e^+e^- \to e^+e^-\pi^+\pi^-\eta_C$

## $\chi_{c2}(1P)$ BRANCHING RATIOS

### HADRONIC DECAYS

$$ \Gamma(\rho^0\pi^+\pi^-) \times \Gamma(2(\pi^+\pi^-)) \quad \Gamma_{26}/\Gamma_1 $$

VALUE DOCUMENT ID TECN COMMENT Γ26/Γ1

0.36±0.15 OUR FIT TANENBAUM 78 MRK1 $\psi(2S) \to \gamma\chi_{c2}$

0.31±0.17

$$ \Gamma(\pi^+\pi^-\pi^0\pi^0)/\Gamma_{\text{total}} \quad \Gamma_3/\Gamma $$

VALUE (%) EVTS DOCUMENT ID TECN COMMENT Γ3/Γ
1.82±0.23±0.05 903.5 1 HE 08B CLEO $e^+e^- \to \gamma h^+h^- h^0 h^0$

¹HE 08B reports $1.87 \pm 0.07 \pm 0.22 \pm 0.13 \%$ from a measurement of $\Gamma(\chi_{c2}(1P) \to \pi^+\pi^-\pi^0\pi^0)/[\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c2}(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\rho^+\pi^-\pi^0 + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_4/\Gamma $$

VALUE (%) EVTS DOCUMENT ID TECN COMMENT Γ4/Γ
2.22±0.34±0.05 1031.9 1,2 HE 08B CLEO $e^+e^- \to \gamma h^+h^- h^0 h^0$

¹HE 08B reports $2.23 \pm 0.11 \pm 0.32 \pm 0.16 \%$ from a measurement of $\Gamma(\chi_{c2}(1P) \to \pi^+\pi^-\pi^0 + \text{c.c.})/\Gamma_{\text{total}} \times [B(\psi(2S) \to \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c2}(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. 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 $\rho^+\pi^-\pi^0$ and $\rho^-\pi^+\pi^0$ decays assuming uncorrelated statistical and fully correlated systematic uncertainties.

$$ \Gamma(4\pi^0)/\Gamma_{\text{total}} \quad \Gamma_5/\Gamma $$

VALUE (units $10^{-3}$) EVTS DOCUMENT ID TECN COMMENT Γ5/Γ

1.13±0.15±0.03 1164 1 ABLIKIM 11A BES3 $e^+e^- \to \psi(2S) \to \gamma\chi_{c2}$

¹ABLIKIM 11A reports $(1.21 \pm 0.05 \pm 0.16) \times 10^{-3}$ from a measurement of $\Gamma(\chi_{c2}(1P) \to 4\pi^0)/[\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c2}(1P)) = (8.74 \pm 0.35) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.
$$ \Gamma(K^{+}K^{-}\pi^{0}\pi^{0})/\Gamma_{\text{total}} \quad \Gamma_{6/\Gamma} $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.21±0.04±0.01</td><td>76.9</td><td>1 HE</td><td>08B</td><td>CLEO</td></tr></tbody></table>

1 HE 08B reports 0.21 ± 0.03 ± 0.03 ± 0.01 % from a measurement of $[\Gamma(\chi_c2(1P) \to K^+K^-\pi^0\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^{+}K^{-}\bar{K}^{0}\pi^{0}+\text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{7/\Gamma} $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.41±0.20±0.03</td><td>211.6</td><td>1 HE</td><td>08B</td><td>CLEO</td></tr></tbody></table>

1 HE 08B reports 1.41 ± 0.11 ± 0.16 ± 0.10 % from a measurement of $[\Gamma(\chi_c2(1P) \to K^+K^-\pi^0\pi^0+\text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\rho^{-}K^{+}K^{0}+\text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{8/\Gamma} $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.42±0.13±0.01</td><td>62.9</td><td>1 HE</td><td>08B</td><td>CLEO</td></tr></tbody></table>

1 HE 08B reports 0.42 ± 0.11 ± 0.06 ± 0.03 % from a measurement of $[\Gamma(\chi_c2(1P) \to \rho^{-}K^{+}K^{0}+\text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^{*}(892)^{0}K^{-}\pi^{+} \to K^{-}\pi^{+}K^{0}\pi^{0}+\text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{9/\Gamma} $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.30±0.08±0.01</td><td>38.7</td><td>1 HE</td><td>08B</td><td>CLEO</td></tr></tbody></table>

1 HE 08B reports 0.30 ± 0.07 ± 0.04 ± 0.02 % from a measurement of $[\Gamma(\chi_c2(1P) \to K^{*}(892)^{0}K^{-}\pi^{+} \to K^{-}\pi^{+}K^{0}\pi^{0}+\text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^{*}(892)^{0}\bar{K}^{0}\pi^{0} \to K^{+}\pi^{-}\bar{K}^{0}\pi^{0}+\text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{10/\Gamma} $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.39±0.09±0.01</td><td>63.0</td><td>1 HE</td><td>08B</td><td>CLEO</td></tr></tbody></table>

1 HE 08B reports 0.39 ± 0.07 ± 0.05 ± 0.03 % from a measurement of $[\Gamma(\chi_c2(1P) \to K^{*}(892)^{0}\bar{K}^{0}\pi^{0} \to K^{-}\pi^{-}\bar{K}^{0}\pi^{0}+\text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^{*}(892)^{-}K^{+}\pi^{0} \to K^{+}\pi^{-}\bar{K}^{0}\pi^{0}+\text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{11/\Gamma} $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.38±0.08±0.01</td><td>51.1</td><td>1 HE</td><td>08B</td><td>CLEO</td></tr></tbody></table>

1 HE 08B reports 0.38 ± 0.07 ± 0.04 ± 0.03 % from a measurement of $[\Gamma(\chi_c2(1P) \to K^{*}(892)^{-}K^{-}\pi^{0} \to K^{+}\pi^{-}\bar{K}^{0}\pi^{0}+\text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^{*}(892)^{+}\bar{K}^{0}\pi^{-} \to K^{+}\pi^{-}\bar{K}^{0}\pi^{0}+\text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{12/\Gamma} $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.30±0.08±0.01</td><td>39.3</td><td>1 HE</td><td>08B</td><td>CLEO</td></tr></tbody></table>

1 HE 08B reports 0.30 ± 0.07 ± 0.04 ± 0.02 % from a measurement of $[\Gamma(\chi_c2(1P) \to K^{*}(892)^{+}\bar{K}^{0}\pi^{-} \to K^{+}\pi^{-}\bar{K}^{0}\pi^{0}+\text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.130±0.045±0.003</td><td>22.9</td><td>1 HE</td><td>08B</td><td>CLEO</td></tr></tbody></table>

1 HE 08B reports 0.13 ± 0.04 ± 0.02 ± 0.01 % from a measurement of $[\Gamma(\chi_c2(1P) \to K^{+}K^{-}\eta\pi^{0})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<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>11.69±0.13±1.31</td><td>11k</td><td>1 ABLIKIM</td><td>13B</td><td>BES3</td></tr></tbody></table>

1 Using 1.06 × 10⁸ $\psi(2S)$ mesons and $B(\psi(2S) \to \chi_c2\gamma) = (8.72 \pm 0.34)\%$.

$$ \Gamma(K^{0}_{S}K^{\pm}\pi^{+}\pi^{-})/\Gamma_{\text{total}} \quad \Gamma_{16/\Gamma} $$

<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>7.30±0.11±0.75</td><td>4.5k</td><td>1 ABLIKIM</td><td>13B</td><td>BES3</td></tr></tbody></table>

1 Using 1.06 × 10⁸ $\psi(2S)$ mesons and $B(\psi(2S) \to \chi_c2\gamma) = (8.72 \pm 0.34)\%$.

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

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.25±0.13</td><td>OUR FIT</td><td></td><td></td><td></td></tr><tr><td>0.25±0.13</td><td>OUR FIT</td><td></td><td></td><td></td></tr></tbody></table>

$$ \Gamma(3(\pi^{+}\pi^{-}))/\Gamma_{\text{total}} \quad \Gamma_{19/\Gamma} $$

<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>15.3±1.9</td><td>OUR AVERAGE</td><td>Error includes scale factor of 3.8.</td><td></td><td></td></tr></tbody></table>

<table><tbody><tr><td>15.9±0.4±0.4</td><td>112K</td><td>1 ABLIKIM</td><td>22Q</td><td>BES3</td><td>ψ(2S) → γ3(π<sup>+</sup>π<sup>-</sup>)</td></tr><tr><td>8.6±0.9±1.6</td><td></td><td>2 BAI</td><td></td><td>BES</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr><tr><td>8.7±5.9±0.4</td><td></td><td>2 TANENBAUM</td><td>78</td><td>MRK1</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr></tbody></table>

1 ABLIKIM 22Q reports (1.565 ± 0.005 ± 0.048) × 10⁻² from a measurement of $[\Gamma(\chi_c2(1P) \to 3(\pi^{+}\pi^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.52 \pm 0.20) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 Rescaled by us using $B(\psi(2S) \to \gamma\chi_c2) = (8.3 \pm 0.4)\%$ and $B(\psi(2S) \to J/\psi(15)\pi^{+}\pi^{-}) = (32.6 \pm 0.5)\%$. Multiplied by a factor of 2 to convert from $\kappa_{S}^{0}K^{+}\pi^{-}$ to $\kappa^{0}K^{+}\pi^{-}$ decay.

$$ \Gamma(\phi\phi)/\Gamma_{\text{total}} \quad \Gamma_{20/\Gamma} $$

<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>1.23 ± 0.07</td><td>OUR FIT</td><td>Error includes scale factor of 1.9.</td><td></td><td></td></tr></tbody></table>

<table><tbody><tr><td>1.267 ± 0.028 ± 0.033</td><td>4247</td><td>1 ABLIKIM</td><td>23N</td><td>BES3</td><td>ψ(2S) → γ hadrons</td></tr></tbody></table>

1 Measured using $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.75 \pm 0.24) \times 10^{-2}$ and $B(\phi \to K^{+}K^{-}) = (49.2 \pm 0.5) \times 10^{-2}$ from PDG 22.

$$ \Gamma(\phi\phi\eta)/\Gamma_{\text{total}} \quad \Gamma_{21/\Gamma} $$

<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>5.4±0.7±0.1</td><td>143.6</td><td>1 ABLIKIM</td><td>20B</td><td>BES3</td><td>ψ(2S) → γφφη</td></tr></tbody></table>

1 ABLIKIM 20B reports (5.33 ± 0.52 ± 0.39) × 10⁻⁴ from a measurement of $[\Gamma(\chi_c2(1P) \to \phi\eta)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.52 \pm 0.20) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\omega\omega)/\Gamma_{\text{total}} \quad \Gamma_{22/\Gamma} $$

<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>0.86±0.10</td><td>OUR AVERAGE</td><td></td><td></td><td></td></tr></tbody></table>

<table><tbody><tr><td>0.83±0.10±0.02</td><td>762</td><td>1 ABLIKIM</td><td>11k</td><td>BES3</td><td>ψ(2S) → γ hadrons</td></tr><tr><td>1.76±0.58±0.04</td><td>27.7 ± 7.4</td><td>2 ABLIKIM</td><td>05N</td><td>BES2</td><td>ψ(2S) → γχ<sub>c2</sub> → γ6π</td></tr></tbody></table>

1 ABLIKIM 11k reports (8.9 ± 0.3 ± 1.1) × 10⁻⁴ from a measurement of $[\Gamma(\chi_c2(1P) \to \omega\omega)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (8.74 ± 0.35) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 ± 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ABLIKIM 05n reports $[\Gamma(\chi_c2(1P) \to \omega\omega)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))] = (0.165 \pm 0.044 \pm 0.032) \times 10^{-3}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\omega K^{+}K^{-})/\Gamma_{\text{total}} \quad \Gamma_{23/\Gamma} $$

<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>0.73±0.04±0.08</td><td>512</td><td>1 ABLIKIM</td><td>13B</td><td>BES3</td><td>e<sup>+</sup>e<sup>-</sup> → ψ(2S) → γχ<sub>c2</sub></td></tr></tbody></table>

1 Using 1.06 × 10⁸ $\psi(2S)$ mesons and $B(\psi(2S) \to \chi_c2\gamma) = (8.72 \pm 0.34)\%$.

$$ \Gamma(\omega\phi)/\Gamma_{\text{total}} \quad \Gamma_{24/\Gamma} $$

<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>9.7±2.8±0.2</td><td>33</td><td>1 ABLIKIM</td><td>19j</td><td>BES3</td><td>ψ(2S) → γ hadrons</td></tr></tbody></table>

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

<table><tbody><tr><td>&lt;19</td><td>90</td><td>2,3 ABLIKIM</td><td>11k</td><td>BES3</td><td>ψ(2S) → γ hadrons</td></tr></tbody></table>

1 ABLIKIM 19j reports $[\Gamma(\chi_c2(1P) \to \omega\phi)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))] = (0.91 \pm 0.23 \pm 0.12) \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ABLIKIM 11k reports $<2 \times 10^{-5}$ from a measurement of $[\Gamma(\chi_c2(1P) \to \omega\phi)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (8.74 \pm 0.35) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = 9.36 \times 10^{-2}$.

3 Superseded by ABLIKIM 19j.

$$ \Gamma(\pi^{+}\pi^{-}\pi^{0}(\text{non-resonant}))/\Gamma_{\text{total}} \quad \Gamma_{27/\Gamma} $$

<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>2.0±0.4±0.1</td><td>64</td><td>1 ABLIKIM</td><td>17AG</td><td>BES3</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (2.1 ± 0.4 ± 0.2) × 10⁻⁵ from a measurement of $[\Gamma(\chi_c2(1P) \to \pi^{+}\pi^{-}\pi^{0}(\text{non-resonant})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c2(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c2(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.
# Meson Particle Listings

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

### $\Gamma(\rho(770)\pm\pi^\mp)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th></tr></thead><tbody><tr><td>0.62&plusmn;0.39&plusmn;0.02</td><td>15</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (0.64 ± 0.39 ± 0.07) × 10⁻⁵ from a measurement of $[\Gamma(\chi_{c2}(1P) → \rho(770)\pm\pi^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>0.49&plusmn;0.13&plusmn;0.01</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ATHAR</td><td>07</td><td>CLEO ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

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

<table><tbody><tr><td>&lt;1.5</td><td>90</td><td>2 ABLIKIM</td><td>06R BES2</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr></tbody></table>

1 ATHAR 07 reports (0.49 ± 0.12 ± 0.06) × 10⁻³ from a measurement of $[\Gamma(\chi_{c2}(1P) → \pi^+\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ABLIKIM 06R reports $< 1.7 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c2}(1P) → \pi^+\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))] = (8.1 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = 9.36 \times 10^{-2}$.

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

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>0.51&plusmn;0.19&plusmn;0.01</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ATHAR</td><td>07</td><td>CLEO ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

1 ATHAR 07 reports (0.51 ± 0.18 ± 0.06) × 10⁻³ from a measurement of $[\Gamma(\chi_{c2}(1P) → \pi^+\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

### $\Gamma(K^*(892)\pm K^\mp)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>1.46&plusmn;0.21&plusmn;0.04</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>+</sup>K<sup>-</sup>π</td></tr></tbody></table>

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

<table><tbody><tr><td>1.75&plusmn;0.27&plusmn;0.04</td><td>2 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>+</sup>K<sup>-</sup>π<sup>0</sup></td></tr><tr><td>1.36&plusmn;0.27&plusmn;0.03</td><td>3 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>0</sup>S K<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (1.5 ± 0.1 ± 0.2) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K^*(892)\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ABLIKIM 17AG reports (1.8 ± 0.2 ± 0.2) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K^*(892)\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 ABLIKIM 17AG reports (1.4 ± 0.2 ± 0.2) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K^*(892)\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>1.27&plusmn;0.27&plusmn;0.03</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>0</sup>S K<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (1.3 ± 0.2 ± 0.2) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K^*(892)^0\bar{K}^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

### $\Gamma(K_2^*(1430)\pm K^\mp)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>1.51&plusmn;1.2&plusmn;0.4</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>+</sup>K<sup>-</sup>π</td></tr></tbody></table>

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

<table><tbody><tr><td>17.7&plusmn;1.6&plusmn;0.4</td><td>2 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>+</sup>K<sup>-</sup>π<sup>0</sup></td></tr><tr><td>13.2&plusmn;1.5&plusmn;0.3</td><td>3 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>0</sup>S K<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (15.5 ± 0.6 ± 1.2) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K_2^*(1430)\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ABLIKIM 17AG reports (18.2 ± 0.8 ± 1.6) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K_2^*(1430)\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 ABLIKIM 17AG reports (13.6 ± 0.8 ± 1.4) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K_2^*(1430)\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>1.27&plusmn;1.7&plusmn;0.3</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>0</sup>S K<sup>±</sup>π<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (13.0 ± 1.0 ± 1.5) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K_2^*(1430)^0\bar{K}^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

### $\Gamma(K_3^*(1780)\pm K^\mp)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>5.3&plusmn;0.8&plusmn;0.1</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>+</sup>K<sup>-</sup>π</td></tr></tbody></table>

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

<table><tbody><tr><td>5.2&plusmn;1.0&plusmn;0.1</td><td>2 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>+</sup>K<sup>-</sup>π<sup>0</sup></td></tr><tr><td>5.7&plusmn;1.8&plusmn;0.1</td><td>3 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>0</sup>S K<sup>±</sup>π<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (5.4 ± 0.5 ± 0.7) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K_3^*(1780)\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ABLIKIM 17AG reports (5.3 ± 0.5 ± 0.9) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K_3^*(1780)\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 ABLIKIM 17AG reports (5.9 ± 1.1 ± 1.5) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K_3^*(1780)\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

### $\Gamma(K_3^*(1780)^0\bar{K}^0 + \text{c.c.})/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>5.7&plusmn;2.1&plusmn;0.1</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>0</sup>S K<sup>±</sup>π<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (5.9 ± 1.6 ± 1.5) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → K_3^*(1780)^0\bar{K}^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

### $\Gamma(a_2(1320)^0\pi^0)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>13.1&plusmn;3.5&plusmn;0.3</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>+</sup>K<sup>-</sup>π<sup>0</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (13.5 ± 1.6 ± 3.2) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → a_2(1320)^0\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

### $\Gamma(a_2(1320)^\pm K^\mp)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>17.9&plusmn;6.2&plusmn;0.4</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>17AG BES3</td><td>ψ(2S) → γK<sup>0</sup>S K<sup>±</sup>π<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 17AG reports (18.4 ± 3.3 ± 5.5) × 10⁻⁴ from a measurement of $[\Gamma(\chi_{c2}(1P) → a_2(1320)^\pm K^\mp)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.11 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>0.31&plusmn;0.08&plusmn;0.01</td><td></td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ATHAR</td><td>07</td><td>CLEO ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

1 ATHAR 07 reports (0.31 ± 0.07 ± 0.04) × 10⁻³ from a measurement of $[\Gamma(\chi_{c2}(1P) → K^+K^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.36 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;0.33</td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ATHAR</td><td>07</td><td>CLEO ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

1 ATHAR 07 reports $< 0.33 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c2}(1P) → K^+K^-\eta)/\Gamma_{\text{total}}] \times [B(\psi(2S) → \gamma\chi_{c2}(1P))]$ assuming $B(\psi(2S) → \gamma\chi_{c2}(1P)) = (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) → \gamma\chi_{c2}(1P)) = 9.36 \times 10^{-2}$.
$$ \Gamma(K^{+} K^{-} \eta'(958)) / \Gamma_{\text{total}} \qquad \Gamma_{45}/\Gamma $$

<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>1.94&plusmn;0.34</td><td>107</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 Derived using B(ψ(2S) → γχ<sub>C2</sub>) = (8.72 ± 0.34)%. Uncertainty includes both statistical and systematic contributions combined in quadrature.

$$ \Gamma(\eta\eta')/\Gamma_{\text{total}} \qquad \Gamma_{46}/\Gamma $$

<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>2.2&plusmn;0.5&plusmn;0.1</td><td>20</td><td>1 ABLIKIM</td><td>17AI</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;&eta;'&eta;</td></tr></tbody></table>

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

<table><tbody><tr><td>&lt;6</td><td>90</td><td>3.3 &plusmn; 8.0</td><td>2 ASNER</td><td>09</td><td>CLEO</td><td>&psi;(2S) &rarr; &gamma;&eta;&eta;'&eta;</td></tr><tr><td>&lt;23</td><td>90</td><td></td><td>3 ADAMS</td><td>07</td><td>CLEO</td><td>&psi;(2S) &rarr; &gamma;&chi;C<sub>2</sub></td></tr></tbody></table>

¹ ABLIKIM 17AI reports (2.27 ± 0.43 ± 0.25) × 10⁻⁵ from a measurement of [Γ(χ<sub>C2</sub>(1P) → ηη')/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.11 ± 0.31) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

² ASNER 09 reports < 0.6 × 10⁻⁴ from a measurement of [Γ(χ<sub>C2</sub>(1P) → ηη')/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.33 ± 0.14 ± 0.61) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = 9.36 × 10⁻².

³ Superseded by ASNER 09. ADAMS 07 reports < 2.3 × 10⁻⁴ from a measurement of [Γ(χ<sub>C2</sub>(1P) → ηη')/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = 0.9033 ± 0.0014 ± 0.0061, which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = 9.36 × 10⁻².

$$ \Gamma(\eta'\eta')/\Gamma_{\text{total}} \qquad \Gamma_{47}/\Gamma $$

<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>4.6&plusmn;0.6&plusmn;0.1</td><td>60</td><td>1 ABLIKIM</td><td>17AI</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;&eta;'&eta;</td></tr></tbody></table>

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

<table><tbody><tr><td>&lt;10</td><td>90</td><td>12 &plusmn; 7</td><td>2 ASNER</td><td>09</td><td>CLEO</td><td>&psi;(2S) &rarr; &gamma;&eta;'&eta;</td></tr><tr><td>&lt;31</td><td>90</td><td></td><td>3 ADAMS</td><td>07</td><td>CLEO</td><td>&psi;(2S) &rarr; &gamma;&chi;C<sub>2</sub></td></tr></tbody></table>

¹ ABLIKIM 17AI reports (4.76 ± 0.56 ± 0.38) × 10⁻⁵ from a measurement of [Γ(χ<sub>C2</sub>(1P) → ηη')/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.11 ± 0.31) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

² ASNER 09 reports < 1.0 × 10⁻⁴ from a measurement of [Γ(χ<sub>C2</sub>(1P) → η'η')/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.33 ± 0.14 ± 0.61) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = 9.36 × 10⁻².

³ Superseded by ASNER 09. ADAMS 07 reports < 3.1 × 10⁻⁴ from a measurement of [Γ(χ<sub>C2</sub>(1P) → η'η')/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = 0.9033 ± 0.0014 ± 0.0061, which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = 9.36 × 10⁻².

$$ \Gamma(\pi^{+} \pi^{-} K_{S}^{0} K_{S}^{0})/\Gamma_{\text{total}} \qquad \Gamma_{48}/\Gamma $$

<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>2.2&plusmn;0.5&plusmn;0.1</td><td>57 &plusmn; 11</td><td>1 ABLIKIM</td><td>050</td><td>BES2</td><td>&psi;(2S) &rarr; &gamma;&chi;C<sub>2</sub></td></tr></tbody></table>

¹ ABLIKIM 050 reports [Γ(χ<sub>C2</sub>(1P) → π<sup>+</sup>π<sup>-</sup> K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup>) / Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] = (0.207 ± 0.039 ± 0.033) which we divide by our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

$$ \Gamma(K^{+} K^{-} K_{S}^{0} K_{S}^{0})/\Gamma_{\text{total}} \qquad \Gamma_{49}/\Gamma $$

<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>&lt;4</td><td>90</td><td>2.3 &plusmn; 2.2</td><td>1 ABLIKIM</td><td>050</td><td>BES2</td><td>e<sup>+</sup>e<sup>-</sup> &rarr; &chi;C<sub>2</sub>&gamma;</td></tr></tbody></table>

¹ ABLIKIM 050 reports [Γ(χ<sub>C2</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>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] < 3.5 × 10⁻⁵ which we divide by our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = 9.36 × 10⁻².

$$ \Gamma(K_{S}^{0} K_{S}^{0} K_{S}^{0})/\Gamma_{\text{total}} \qquad \Gamma_{50}/\Gamma $$

<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>1.15&plusmn;0.18&plusmn;0.03</td><td>68</td><td>1 ABLIKIM</td><td>19AA</td><td>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 ± 0.05)%. ABLIKIM 19AA reports [Γ(χ<sub>C2</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>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] = (10.8 ± 1.5 ± 0.8) × 10⁻⁶ which we divide by our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

$$ \Gamma(K^{+} K^{-})/\Gamma_{\text{total}} \qquad \Gamma_{52}/\Gamma $$

<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>1.45&plusmn;0.30&plusmn;0.04</td><td>52</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 (1.67 ± 0.26 ± 0.24) × 10⁻³ from a measurement of [Γ(χ<sub>C2</sub>(1P) → K<sup>+</sup> K<sup>-</sup> φ') / Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (8.1 ± 0.4) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

$$ \Gamma(K^{0} K^{+} \pi^{-} \phi + c.c.)/\Gamma_{\text{total}} \qquad \Gamma_{53}/\Gamma $$

<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>4.83&plusmn;0.32&plusmn;0.66</td><td></td><td>1 ABLIKIM</td><td>15M</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;&chi;C<sub>2</sub></td></tr></tbody></table>

$$ \Gamma(K^{+} K^{-} \pi^{0} \phi) / \Gamma_{\text{total}} \qquad \Gamma_{54}/\Gamma $$

<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>2.74&plusmn;0.16&plusmn;0.44</td><td></td><td>1 ABLIKIM</td><td>15M</td><td>BES3</td><td>&psi;(2S) &rarr; &gamma;&chi;C<sub>2</sub></td></tr></tbody></table>

$$ \Gamma(\phi\pi^{+} \pi^{-} \pi^{0})/\Gamma_{\text{total}} \qquad \Gamma_{55}/\Gamma $$

<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>0.93&plusmn;0.06&plusmn;0.10</td><td>408</td><td>1 ABLIKIM</td><td>13B</td><td>BES3</td><td>e<sup>+</sup>e<sup>-</sup> &rarr; &psi;(2S) &rarr; &gamma;&chi;C<sub>2</sub></td></tr></tbody></table>

¹ Using 1.06 × 10⁸ ψ(2S) mesons and B(ψ(2S) → χ<sub>C2</sub>γ) = (8.72 ± 0.34)%.

$$ \Gamma(p\bar{p}\pi^{0})/\Gamma_{\text{total}} \qquad \Gamma_{57}/\Gamma $$

<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>0.47&plusmn;0.04</td><td>OUR AVERAGE</td><td></td><td></td><td></td></tr></tbody></table>

<table><tbody><tr><td>0.48&plusmn;0.04</td><td>0.01</td><td>1</td><td>ONLYISI</td><td>10</td><td>CLE3</td><td>&psi;(2S) &rarr; p&nabla;pX</td></tr><tr><td>0.44&plusmn;0.09</td><td>0.01</td><td>2</td><td>ATHAR</td><td>07</td><td>CLEO</td><td>&psi;(2S) &rarr; &gamma;h<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

¹ ONLYISI 10 reports (4.83 ± 0.25 ± 0.35 ± 0.31) × 10⁻⁴ from a measurement of [Γ(χ<sub>C2</sub>(1P) → pπ<sub>0</sub>)/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.33 ± 0.14 ± 0.61) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

² ATHAR 07 reports (0.44 ± 0.08 ± 0.05) × 10⁻³ from a measurement of [Γ(χ<sub>C2</sub>(1P) → pπ<sub>0</sub>)/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.33 ± 0.14 ± 0.61) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

$$ \Gamma(p\bar{p}\eta')/\Gamma_{\text{total}} \qquad \Gamma_{58}/\Gamma $$

<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>0.177&plusmn;0.025</td><td>OUR AVERAGE</td><td></td><td></td><td></td></tr></tbody></table>

<table><tbody><tr><td>0.175&plusmn;0.027</td><td>0.004</td><td>1</td><td>ONLYISI</td><td>10</td><td>CLE3</td><td>&psi;(2S) &rarr; p&nabla;pX</td></tr><tr><td>0.189&plusmn;0.071</td><td>0.005</td><td>2</td><td>ATHAR</td><td>07</td><td>CLEO</td><td>&psi;(2S) &rarr; &gamma;h<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

¹ ONLYISI 10 reports (1.76 ± 0.23 ± 0.14 ± 0.11) × 10⁻⁴ from a measurement of [Γ(χ<sub>C2</sub>(1P) → pπ<sub>0</sub>)/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.33 ± 0.14 ± 0.61) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

² ATHAR 07 reports (0.19 ± 0.07 ± 0.02) × 10⁻³ from a measurement of [Γ(χ<sub>C2</sub>(1P) → pπ<sub>0</sub>)/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.33 ± 0.14 ± 0.61) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

$$ \Gamma(p\bar{p}\omega')/\Gamma_{\text{total}} \qquad \Gamma_{59}/\Gamma $$

<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>0.37&plusmn;0.04</td><td>0.01</td><td>1</td><td>ONLYISI</td><td>10</td><td>CLE3</td><td>&psi;(2S) &rarr; p&nabla;pX</td></tr></tbody></table>

¹ ONLYISI 10 reports (3.68 ± 0.35 ± 0.26 ± 0.24) × 10⁻⁴ from a measurement of [Γ(χ<sub>C2</sub>(1P) → pπ<sub>0</sub>)/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.33 ± 0.14 ± 0.61) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

$$ \Gamma(p\bar{p}\phi')/\Gamma_{\text{total}} \qquad \Gamma_{60}/\Gamma $$

<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>2.8&plusmn;0.9&plusmn;0.1</td><td>24 &plusmn; 7</td><td>1 ABLIKIM</td><td>11F</td><td>BES3</td><td>&psi;(2S) &rarr; p&nabla;pK<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

¹ ABLIKIM 11F reports (3.04 ± 0.85 ± 0.43) × 10⁻⁵ from a measurement of [Γ(χ<sub>C2</sub>(1P) → pπ<sub>0</sub>)/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (8.74 ± 0.35) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.

$$ \Gamma(p\bar{p}\pi^{+} \pi^{-})/\Gamma_{\text{total}} \qquad \Gamma_{61}/\Gamma $$

<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></table>

¹ 3.2±0.34 OUR EVALUATION Treating systematic error as correlated.

1.3 ± 0.4 OUR AVERAGE Error includes scale factor of 1.3.

<table><tbody><tr><td>1.17&plusmn;0.19</td><td>0.30</td><td>1</td><td>BAI</td><td>99B</td><td>BES</td><td>&psi;(2S) &rarr; &gamma;&chi;C<sub>2</sub></td></tr><tr><td>2.64&plusmn;1.03</td><td>0.14</td><td>1</td><td>TANENBAUM</td><td>78</td><td>MRK1</td><td>&psi;(2S) &rarr; &gamma;&chi;C<sub>2</sub></td></tr></tbody></table>

¹ Rescaled by us using B(ψ(2S) → γχ<sub>C2</sub>) = (8.3 ± 0.4)% and B(ψ(2S) → J/ψ(15)π<sup>+</sup>π<sup>-</sup>) = (32.6 ± 0.5)%. Multiplied by a factor of 2 to convert from K<sub>S</sub><sup>0</sup> K<sup>+</sup>π<sup>-</sup> to K<sup>0</sup> K<sup>+</sup>π<sup>-</sup> decay.

$$ \Gamma(p\bar{p}\pi^{0}\pi^{0})/\Gamma_{\text{total}} \qquad \Gamma_{62}/\Gamma $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.080&plusmn;0.024</td><td>0.002</td><td>1 HE</td><td>08B</td><td>CLEO</td><td>e<sup>+</sup>e<sup>-</sup> &rarr; &gamma;h<sup>+</sup>h<sup>-</sup>h<sup>0</sup>h<sup>0</sup></td></tr></tbody></table>

¹ HE 08B reports 0.08 ± 0.02 ± 0.01 ± 0.01 % from a measurement of [Γ(χ<sub>C2</sub>(1P) → pπ<sub>0</sub>π<sub>0</sub>)/Γ<sub>total</sub>] × [B(ψ(2S) → γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.33 ± 0.14 ± 0.61) × 10⁻², which we rescale to our best value B(ψ(2S) → γχ<sub>C2</sub>(1P)) = (9.36 ± 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.
$$ \Gamma(\bar{p}\bar{p}K^+K^- \text{ (non-resonant)})/\Gamma_{\text{total}} \qquad \Gamma_{63}/\Gamma $$

<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>1.94&plusmn;0.32&plusmn;0.05</td><td>131 &plusmn; 12</td><td>1 ABLIKIM</td><td>11F</td><td>BES3 &psi;(2S) &rarr; &gamma;p&bar;pK<sup>+</sup>K<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 11F reports (2.08&plusmn;0.19&plusmn;0.30) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; p&bar;pK<sup>+</sup>K<sup>-</sup> (non-resonant))/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (8.74 &plusmn; 0.35) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(\bar{p}K_5^0 K_5^0)/\Gamma_{\text{total}} \qquad \Gamma_{64}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>&lt;7.9</b></td><td>90</td><td>1 ABLIKIM</td><td>06D</td><td>BES2 &psi;(2S) &rarr; &chi;C2&gamma;</td></tr></tbody></table>

1 Using B(ψ(2S) &rarr; χ<sub>C2</sub>γ) = (9.3 &plusmn; 0.6)%.

$$ \Gamma(\bar{p}\pi^-)/\Gamma_{\text{total}} \qquad \Gamma_{65}/\Gamma $$

<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><b>8.7&plusmn;1.0</b> OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>8.5&plusmn;1.0&plusmn;0.2</td><td>3309</td><td>1 ABLIKIM</td><td>12J</td><td>BES3 &psi;(2S) &rarr; &gamma;p&bar;p&pi;<sup>-</sup></td></tr><tr><td>10.4&plusmn;3.5&plusmn;0.3</td><td></td><td>2 ABLIKIM</td><td>06I</td><td>BES2 &psi;(2S) &rarr; &gamma;p&pi;<sup>-</sup>&chi;</td></tr></tbody></table>

1 ABLIKIM 12J reports [Γ(χ<sub>C2</sub>(1P) &rarr; p&bar;p&pi;<sup>-</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] = (0.80 &plusmn; 0.02 &plusmn; 0.09) &times; 10<sup>-4</sup> which we divide by our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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 06I reports [Γ(χ<sub>C2</sub>(1P) &rarr; p&bar;p&pi;<sup>-</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] = (0.97 &plusmn; 0.20 &plusmn; 0.26) &times; 10<sup>-4</sup> which we divide by our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(\bar{p}\pi^+)/\Gamma_{\text{total}} \qquad \Gamma_{66}/\Gamma $$

<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><b>9.1&plusmn;0.8&plusmn;0.2</b></td><td>3732</td><td>1 ABLIKIM</td><td>12J</td><td>BES3 &psi;(2S) &rarr; &gamma;p&bar;p&pi;<sup>+</sup></td></tr></tbody></table>

1 ABLIKIM 12J reports [Γ(χ<sub>C2</sub>(1P) &rarr; p&bar;p&pi;<sup>-</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] = (0.85 &plusmn; 0.02 &plusmn; 0.07) &times; 10<sup>-4</sup> which we divide by our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(\bar{p}\pi^-\pi^0)/\Gamma_{\text{total}} \qquad \Gamma_{67}/\Gamma $$

<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><b>22.1&plusmn;1.7&plusmn;0.5</b></td><td>2128</td><td>1 ABLIKIM</td><td>12J</td><td>BES3 &psi;(2S) &rarr; &gamma;p&bar;p&pi;<sup>-</sup>&pi;<sup>0</sup></td></tr></tbody></table>

1 ABLIKIM 12J reports [Γ(χ<sub>C2</sub>(1P) &rarr; p&bar;p&pi;<sup>-</sup>&pi;<sup>0</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] = (2.07 &plusmn; 0.06 &plusmn; 0.15) &times; 10<sup>-4</sup> which we divide by our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(\bar{p}\pi^+\pi^0)/\Gamma_{\text{total}} \qquad \Gamma_{68}/\Gamma $$

<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><b>21.5&plusmn;1.8&plusmn;0.5</b></td><td>2352</td><td>1 ABLIKIM</td><td>12J</td><td>BES3 &psi;(2S) &rarr; &gamma;p&bar;p&pi;<sup>+</sup>&pi;<sup>0</sup></td></tr></tbody></table>

1 ABLIKIM 12J reports [Γ(χ<sub>C2</sub>(1P) &rarr; p&bar;p&pi;<sup>-</sup>&pi;<sup>0</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] = (2.01 &plusmn; 0.06 &plusmn; 0.16) &times; 10<sup>-4</sup> which we divide by our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(\bar{p}\Lambda\pi^+\pi^-)/\Gamma_{\text{total}} \qquad \Gamma_{70}/\Gamma $$

<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><b>128&plusmn;15&plusmn;3</b></td><td>371</td><td>1 ABLIKIM</td><td>12J</td><td>BES3 &psi;(2S) &rarr; &gamma;\Lambda\bar{p}\pi<sup>+</sup>&pi;<sup>-</sup></td></tr></tbody></table>

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

<350 90 2 ABLIKIM 06D BES2 ψ(2S) &rarr; χ<sub>C2</sub>γ

1 ABLIKIM 12I reports (137.0 &plusmn; 7.6 &plusmn; 15.7) &times; 10<sup>-5</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; ΛΛπ<sup>+</sup>&pi;<sup>-</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (8.72 &plusmn; 0.34) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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 Using B(ψ(2S) &rarr; χ<sub>C2</sub>γ) = (9.3 &plusmn; 0.6)%.

$$ \Gamma(\Lambda\bar{p}\pi^+\pi^- \text{ (non-resonant)})/\Gamma_{\text{total}} \qquad \Gamma_{71}/\Gamma $$

<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><b>67&plusmn;15&plusmn;2</b></td><td>36</td><td>1 ABLIKIM</td><td>12J</td><td>BES3 &psi;(2S) &rarr; &gamma;\Lambda\bar{p}\pi<sup>+</sup>&pi;<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 12I reports (71.8 &plusmn; 14.5 &plusmn; 8.2) &times; 10<sup>-5</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; ΛΛπ<sup>+</sup>&pi;<sup>-</sup> (non-resonant))/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (8.72 &plusmn; 0.34) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(\Sigma(1385)+\bar{\Lambda}\pi^-+\text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{72}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>&lt;40</b></td><td>90</td><td>1 ABLIKIM</td><td>12J</td><td>BES3 &psi;(2S) &rarr; &gamma;\Sigma(1385)+\bar{\Lambda}\pi<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 12I reports < 42 &times; 10<sup>-5</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; Σ(1385)+\bar{\Lambda}\pi<sup>-</sup> + c.c.)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (8.72 &plusmn; 0.34) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = 9.36 &times; 10<sup>-2</sup>.

$$ \Gamma(\Sigma(1385)-\bar{\Lambda}\pi^+ + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{73}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>&lt;60</b></td><td>90</td><td>1 ABLIKIM</td><td>12J</td><td>BES3 &psi;(2S) &rarr; &gamma;\Sigma(1385)-\bar{\Lambda}\pi<sup>+</sup></td></tr></tbody></table>

1 ABLIKIM 12I reports < 61 &times; 10<sup>-5</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; Σ(1385)-\bar{\Lambda}\pi<sup>+</sup> + c.c.)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (8.72 &plusmn; 0.34) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = 9.36 &times; 10<sup>-2</sup>.

$$ \Gamma(K^+\bar{p}\Lambda + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{75}/\Gamma $$

<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><b>7.9&plusmn;0.6</b> OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr></tbody></table>

7.8&plusmn;0.5&plusmn;0.2 5k 1,2 ABLIKIM 13D BES3 ψ(2S) &rarr; &gamma;\Lambda\bar{p}K<sup>+</sup>

8.5&plusmn;1.6&plusmn;0.2 3 ATHAR 07 CLEO ψ(2S) &rarr; &gamma;h<sup>+</sup>h<sup>-</sup>h<sup>0</sup> 1 ABLIKIM 13D reports (8.4 &plusmn; 0.3 &plusmn; 0.6) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; K<sup>+</sup>\bar{p}\Lambda + c.c.)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (8.72 &plusmn; 0.34) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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 Using B(Λ &rarr; p&pi;<sup>-</sup>) = 63.9%.

3 ATHAR 07 reports (8.5 &plusmn; 1.4 &plusmn; 1.0) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; K<sup>+</sup>\bar{p}\Lambda + c.c.)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.33 &plusmn; 0.14 &plusmn; 0.61) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(nK_5^0\bar{\Lambda} + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{76}/\Gamma $$

<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><b>3.64&plusmn;0.27&plusmn;0.09</b></td><td>879</td><td>1 ABLIKIM</td><td>21AV BES3</td><td>ψ(2S) &rarr; &gamma;\Lambda K<sup>+</sup> + c.c.</td></tr></tbody></table>

1 ABLIKIM 21AV reports (3.58 &plusmn; 0.16 &plusmn; 0.23) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; nK<sub>5</sub><sup>0</sup>\bar{\Lambda} + c.c.)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = 0.0952 &plusmn; 0.0020, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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. Also uses B(Λ &rarr; p&pi;<sup>+</sup>) = (63.9 &plusmn; 0.5)% and B(K<sub>5</sub><sup>0</sup> &rarr; π<sup>+</sup>&pi;<sup>-</sup>) = (69.20 &plusmn; 0.05)%.

$$ \Gamma(K^*(892)^+\bar{p}\Lambda + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{77}/\Gamma $$

<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><b>8.3&plusmn;1.2&plusmn;0.2</b></td><td>476</td><td>1 ABLIKIM</td><td>19AV BES3</td><td>ψ(2S) &rarr; &gamma;K<sup>+</sup>\bar{p}\Lambda</td></tr></tbody></table>

1 ABLIKIM 19AV reports [Γ(χ<sub>C2</sub>(1P) &rarr; K<sup>*</sup>(892)<sup>+</sup>\bar{p}\Lambda + c.c.)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] = (7.8 &plusmn; 0.9 &plusmn; 0.6) &times; 10<sup>-5</sup> which we divide by our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(K^+\bar{p}\Lambda(1520)+\text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{78}/\Gamma $$

<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><b>2.9&plusmn;0.7&plusmn;0.1</b></td><td>79 &plusmn; 13</td><td>1 ABLIKIM</td><td>11F BES3</td><td>ψ(2S) &rarr; \gamma p\bar{p}K<sup>+</sup>\bar{K}<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 11F reports (3.06 &plusmn; 0.50 &plusmn; 0.54) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; K<sup>+</sup>\bar{p}\Lambda(1520) + c.c.)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (8.74 &plusmn; 0.35) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(\Lambda(1520)\bar{\Lambda}(1520))/\Gamma_{\text{total}} \qquad \Gamma_{79}/\Gamma $$

<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><b>4.7&plusmn;1.5&plusmn;0.1</b></td><td>29 &plusmn; 7</td><td>1 ABLIKIM</td><td>11F BES3</td><td>ψ(2S) &rarr; \gamma p\bar{p}K<sup>+</sup>\bar{K}<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 11F reports (5.05 &plusmn; 1.29 &plusmn; 0.93) &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; Λ(1520)\bar{\Lambda}(1520))/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (8.74 &plusmn; 0.35) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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.

$$ \Gamma(\Sigma^0\Sigma^0)/\Gamma_{\text{total}} \qquad \Gamma_{80}/\Gamma $$

<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><b>3.7&plusmn;0.6&plusmn;0.1</b></td><td>91</td><td>1 ABLIKIM</td><td>18V BES3</td><td>ψ(2S) &rarr; &gamma;\Sigma^0\Sigma^0</td></tr></tbody></table>

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

<6 90 2 ABLIKIM 13H BES3 ψ(2S) &rarr; &gamma;\Sigma^0\Sigma^0
<7 90 3 NAIK 08 CLEO ψ(2S) &rarr; &gamma;\Sigma^0\Sigma^0

1 ABLIKIM 18v reports [Γ(χ<sub>C2</sub>(1P) &rarr; Σ<sup>0</sup>\Sigma<sup>0</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] = (0.35 &plusmn; 0.05 &plusmn; 0.02) &times; 10<sup>-5</sup> which we divide by our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.36 &plusmn; 0.23) &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 13v reports < 0.65 &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; Σ<sup>0</sup>\Sigma<sup>0</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (8.74 &plusmn; 0.35) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = 9.36 &times; 10<sup>-2</sup>.

3 NAIK 08 reports < 0.75 &times; 10<sup>-4</sup> from a measurement of [Γ(χ<sub>C2</sub>(1P) &rarr; Σ<sup>0</sup>\Sigma<sup>0</sup>)/Γ<sub>total</sub>] &times; [B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P))] assuming B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = (9.33 &plusmn; 0.14 &plusmn; 0.61) &times; 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) &rarr; γχ<sub>C2</sub>(1P)) = 9.36 &times; 10<sup>-2</sup>.
$$\Gamma(\Sigma^+\Sigma^-)/\Gamma_{\text{total}}$$

$$\Gamma_{83}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-5}) & \text{CL\%} & \text{EVTS} \\ 3.4 \pm 0.7 \pm 0.1 & 55 & 1 \end{array}$$

$$\begin{array}{lcr} & \text{DOCUMENT ID} & \text{TECN} \\ & 1 \end{array}$$

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

$$\begin{array}{lcr} & & \text{EVTS} \\ <8 & 90 & 2 \end{array}$$

$$\begin{array}{lcr} & \text{DOCUMENT ID} & \text{TECN} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 2 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 3 \end{array}$$

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

$$\Gamma_{84}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-5}) & \text{CL\%} & \text{EVTS} \\ 4.5 \pm 1.8 \pm 0.1 & 131 & 1 \end{array}$$

$$\begin{array}{lcr} & \text{DOCUMENT ID} & \text{TECN} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

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

$$\Gamma_{85}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-5}) & \text{CL\%} & \text{DOCUMENT ID} \\ <16 & 90 & 1 \end{array}$$

$$\begin{array}{lcr} & \text{DOCUMENT ID} & \text{TECN} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

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

$$\Gamma_{86}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-5}) & \text{CL\%} & \text{DOCUMENT ID} \\ <8 & 90 & 1 \end{array}$$

$$\begin{array}{lcr} & \text{DOCUMENT ID} & \text{TECN} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

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

$$\Gamma_{87}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-4}) & \text{CL\%} & \text{EVTS} \\ 1.80 \pm 0.32 \pm 0.04 & 51 & 1 \end{array}$$

$$\begin{array}{lcr} & \text{DOCUMENT ID} & \text{TECN} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

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

$$\Gamma_{88}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-4}) & \text{CL\%} & \text{EVTS} \\ 1.86 \pm 0.22 \pm 0.05 & 804 & 1 \end{array}$$

$$\begin{array}{lcr} & \text{DOCUMENT ID} & \text{TECN} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 2 \end{array}$$

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

$$\Gamma_{89}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-4}) & \text{CL\%} & \text{EVTS} \\ 1.46 \pm 0.12 \pm 0.08 & 1691 & 1 \end{array}$$

$$\begin{array}{lcr} & \text{DOCUMENT ID} & \text{TECN} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

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

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 3 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 2 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & (9.33 \pm 0.14 \pm 0.61) \times 10^{-2}, & \\ & & \\ & = (9.36 \pm 0.23) \times 10^{-2}. & \text{Our first error is their experiment's error and our second error} \\ & & \\ & \text{is the systematic error from using our best value.} & \\ & & \\ & 3 \end{array}$$

Using $B(\psi(2S) \rightarrow \chi_{c2}\gamma) = (9.3 \pm 0.6)\%$.

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

$$\Gamma_{90}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-5}) & \text{CL\%} & \text{EVTS} \\ 4.52 \pm 0.24 \pm 0.18 & 1038 & 1 \end{array}$$

$$\begin{array}{lcr} & \text{DOCUMENT ID} & \text{TECN} \\ & 1 \end{array}$$

$$\Gamma(J/\psi(1S)\pi^+\pi^-\pi^0)/\Gamma_{\text{total}}$$

$$\Gamma_{91}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE} & \text{CL\%} & \text{DOCUMENT ID} \\ <0.015 & 90 & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

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

$$\Gamma_{92}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE} & \text{CL\%} & \text{DOCUMENT ID} \\ <3.2 \times 10^{-3} & 90 & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\Gamma(\eta_C(1S)\pi^+\pi^-)/\Gamma_{\text{total}}$$

$$\Gamma_{93}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE} & \text{CL\%} & \text{DOCUMENT ID} \\ <0.54 \times 10^{-2} & 90 & 1,2 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1,3 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1,2 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 2 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 3 \end{array}$$

$$\Gamma(\eta_C(1S)\pi^+\pi^-)/\Gamma(\bar{\mathcal{K}}^0\bar{\mathcal{K}}^+\pi^- + \text{c.c.})$$

$$\Gamma_{93}/\Gamma_{42}$$

$$\begin{array}{lcr} \text{VALUE} & \text{CL\%} & \text{DOCUMENT ID} \\ <16.4 & 90 & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

RADIATIVE DECAYS

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

$$\Gamma_{95}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-6}) & \text{CL\%} & \text{EVTS} \\ <19 & 90 & 13 \pm 11 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

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

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 40 & 90 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 2 \end{array}$$

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

$$\Gamma_{96}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-6}) & \text{CL\%} & \text{EVTS} \\ <6 & 90 & 1 \pm 6 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 40 & 90 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 2 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 2 \end{array}$$

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

$$\Gamma_{97}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-6}) & \text{CL\%} & \text{EVTS} \\ <8 & 90 & 5 \pm 5 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 2 \end{array}$$

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

$$\Gamma_{99}/\Gamma$$

$$\begin{array}{lcr} \text{VALUE (units } 10^{-3}) & \text{CL\%} & \text{EVTS} \\ & 2.41 \pm 0.15 \pm 0.06 & 1.3k \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

$$\begin{array}{lcr} & & \text{COMMENT} \\ & 1 \end{array}$$

Not independent from other measurements reported by ABLIKIM 171
$$
\Gamma(e^+ e^- J/\psi(1S))/\Gamma(\gamma J/\psi(1S)) \quad \Gamma_{99}/\Gamma_{94}
$$

<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>11.3&plusmn;0.4&plusmn;0.5</td>
      <td>1.3k</td>
      <td>1 ABLIKIM</td>
      <td>17i</td>
      <td>BES3</td>
    </tr>
  </tbody>
</table>

¹ Uses B(ψ(2S) → γχ<sub>C2</sub>(1P)) × B(χ<sub>C2</sub>(1P) → γJ/ψ(1S)) = (199.6 ± 0.8) × 10<sup>-4</sup> from ABLIKIM 17N and accounts for common systematic errors.

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

<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>9.40&plusmn;0.79&plusmn;1.15</td>
      <td>219</td>
      <td>ABLIKIM</td>
      <td>19z</td>
      <td>BES3</td>
    </tr>
  </tbody>
</table>

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

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

<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>1.50&plusmn;0.08</td>
      <td>OUR FIT</td>
      <td colspan="3">Error includes scale factor of 1.5.</td>
    </tr>
    <tr>
      <td>0.99&plusmn;0.18</td>
      <td></td>
      <td>1 AMBROGIANI 00B</td>
      <td>E835</td>
      <td>p&#773;p&#773; &rarr; &chi;<sub>C2</sub> &rarr; &gamma;&gamma;, &gamma;J/&psi;</td>
    </tr>
  </tbody>
</table>

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

$$
\Gamma(\gamma\gamma)/\Gamma_{\text{total}} \times \Gamma(p\bar{p})/\Gamma_{\text{total}} \quad \Gamma_{98}/\Gamma_{56}/\Gamma
$$

<table>
  <thead>
    <tr>
      <th>VALUE (units 10<sup>-8</sup>)</th>
      <th>EVTS</th>
      <th>DOCUMENT ID</th>
      <th>TECN</th>
      <th>COMMENT</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>2.12&plusmn;0.15</td>
      <td>OUR FIT</td>
      <td colspan="3">Error includes scale factor of 1.2.</td>
    </tr>
    <tr>
      <td>1.7&plusmn;0.4</td>
      <td>OUR AVERAGE</td>
      <td colspan="3"></td>
    </tr>
  </tbody>
</table>

<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>1.60&plusmn;0.42</td>
      <td>ARMSTRONG</td>
      <td>93</td>
      <td>E760</td>
      <td>p&#773;p&#773; p&#773;p&#773; &rarr; &gamma;&gamma;&chi;</td>
    </tr>
    <tr>
      <td>9.9&plusmn;4.5</td>
      <td>BAGLIN</td>
      <td>87B</td>
      <td>SPEC</td>
      <td>p&#773;p&#773; p&#773;p&#773; &rarr; &gamma;&gamma;&chi;</td>
    </tr>
  </tbody>
</table>

$\chi_{c2}(1P)$ CROSS-PARTICLE BRANCHING RATIOS

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow K^{+} K^{-} \pi^{+} \pi^{-}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c2}(1P)) / \Gamma(\psi(2S) \rightarrow \\
\quad J/\psi(1S) \pi^{+} \pi^{-}) \quad \Gamma_{14} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S) / 12}
\end{array}
$$

<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>2.24&plusmn;0.30</td>
      <td>OUR FIT</td>
      <td colspan="3">Error includes scale factor of 1.2.</td>
    </tr>
    <tr>
      <td>2.5 &plusmn;0.9</td>
      <td>OUR AVERAGE</td>
      <td colspan="3">Error includes scale factor of 2.3.</td>
    </tr>
  </tbody>
</table>

<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>1.90&plusmn;0.14&plusmn;0.44</td>
      <td>BAI</td>
      <td>99B</td>
      <td>BES</td>
      <td>ψ(2S) → γχ<sub>C2</sub></td>
    </tr>
    <tr>
      <td>3.8&plusmn;0.67</td>
      <td>1 TANENBAUM</td>
      <td>78</td>
      <td>MRK1</td>
      <td>ψ(2S) → γχ<sub>C2</sub></td>
    </tr>
  </tbody>
</table>

¹The reported value is derived using B(ψ(2S) → π⁺π⁻J/ψ) × B(J/ψ → ℓ⁺ℓ⁻) = (4.6 ± 0.7)%. Calculated by us using B(J/ψ → ℓ⁺ℓ⁻) = 0.1181 ± 0.0020.

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow K^*(892)^0 \bar{K}^*(892)^0) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c2}(1P)) / \\
\quad \Gamma_{\text{total}} / \Gamma_{18} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S)}
\end{array}
$$

<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>2.1 &plusmn;0.9</td>
      <td>OUR FIT</td>
      <td colspan="3">Error includes scale factor of 2.3.</td>
    </tr>
  </tbody>
</table>

<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>3.11&plusmn;0.36&plusmn;0.48</td>
      <td>ABLIKIM</td>
      <td>04H</td>
      <td>BES2</td>
      <td>ψ(2S) → γχ<sub>C2</sub></td>
    </tr>
  </tbody>
</table>

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow p\bar{p}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c2}(1P)) / \Gamma(\psi(2S) \rightarrow \\
\quad J/\psi(1S) \pi^{+} \pi^{-}) \quad \Gamma_{56} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S) / 12}
\end{array}
$$

<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>1.96&plusmn;0.10</td>
      <td>OUR FIT</td>
      <td colspan="3">Error includes scale factor of 1.1.</td>
    </tr>
  </tbody>
</table>

<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>1.4 &plusmn;1.1</td>
      <td>1 BAI</td>
      <td>98i</td>
      <td>BES</td>
      <td>ψ(2S) → γχ<sub>C2</sub> → γp&#773;p</td>
    </tr>
  </tbody>
</table>

¹Calculated by us. The value for B(χ<sub>C2</sub> → pρ̄) reported in BAI 98i is derived using B(ψ(2S) → γχ<sub>C2</sub>) = (7.8 ± 0.8)% and B(ψ(2S) → J/ψ(1S)π⁺π⁻) = (32.4 ± 2.6)% [BAI 98D].

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow p\bar{p}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) / \Gamma_{\text{total}} \\
\quad \Gamma_{56} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S)}
\end{array}
$$

<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>6.79&plusmn;0.34</td>
      <td>OUR FIT</td>
      <td colspan="3">Error includes scale factor of 1.1.</td>
    </tr>
  </tbody>
</table>

<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>7.1 &plusmn;0.5</td>
      <td>OUR AVERAGE</td>
      <td colspan="3">Error includes scale factor of 1.2.</td>
    </tr>
  </tbody>
</table>

<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>7.3 &plusmn;0.4</td>
      <td>0.40</td>
      <td>405</td>
      <td>ABLIKIM</td>
      <td>13v BES3 ψ(2S) → γp&#773;p&#773;</td>
    </tr>
    <tr>
      <td>7.2 &plusmn;0.7</td>
      <td>0.4</td>
      <td>121</td>
      <td>1 NAIK</td>
      <td>08 CLEO ψ(2S) → γp&#773;p&#773;</td>
    </tr>
    <tr>
      <td>4.4 &plusmn;1.6</td>
      <td>0.6</td>
      <td>14.3</td>
      <td>BAI</td>
      <td>04F BES ψ(2S) → γχ<sub>C2</sub>(1P) → γp&#773;p</td>
    </tr>
  </tbody>
</table>

¹Calculated by us. NAIK 08 reports B(χ<sub>C2</sub> → pρ̄) = (7.7 ± 0.8) × 0.4 ± 0.5) × 10⁻⁵ using B(ψ(2S) → γχ<sub>C2</sub>) = (9.33 ± 0.14 ± 0.61)%.

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow \Lambda\bar{\Lambda}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c2}(1P)) / \Gamma_{\text{total}} \\
\quad \Gamma_{69} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S)}
\end{array}
$$

<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>17.4&plusmn;1.4</td>
      <td>OUR FIT</td>
      <td colspan="3"></td>
    </tr>
    <tr>
      <td>17.3&plusmn;1.5</td>
      <td>OUR AVERAGE</td>
      <td colspan="3"></td>
    </tr>
  </tbody>
</table>

<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>18.2&plusmn;0.8&plusmn;1.7</td>
      <td>670</td>
      <td>ABLIKIM</td>
      <td>21L</td>
      <td>BES3 ψ(2S) → γpπ<sup>-</sup>π<sup>+</sup> →</td>
    </tr>
    <tr>
      <td>15.9&plusmn;2.1&plusmn;1.0</td>
      <td>71</td>
      <td>1 NAIK</td>
      <td>08</td>
      <td>CLEO ψ(2S) → γΛ̄Λ</td>
    </tr>
  </tbody>
</table>

<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>18.2&plusmn;1.4&plusmn;0.9</td>
      <td>207</td>
      <td>2,3 ABLIKIM</td>
      <td>13H</td>
      <td>BES3 ψ(2S) → γΛ̄Λ</td>
    </tr>
  </tbody>
</table>

¹Calculated by us. NAIK 08 reports B(χ<sub>C2</sub> → ΛΛ̄) = (17.0 ± 2.2) ± 1.1) × 10⁻⁵ using B(ψ(2S) → γχ<sub>C2</sub>) = (9.33 ± 0.14 ± 0.61)%.

²Superseded by ABLIKIM 21L
³Calculated by us. ABLIKIM 13H reports B(χ<sub>C2</sub> → ΛΛ̄) = (20.8 ± 1.6) × 2.3) × 10⁻⁵ from a measurement of B(χ<sub>C2</sub> → ΛΛ̄) × B(ψ(2S) → γχ<sub>C2</sub>) assuming B(ψ(2S) → γχ<sub>C2</sub>) = (8.74 ± 0.35)%.

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow \Lambda\bar{\Lambda}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) / \Gamma(\psi(2S) \rightarrow \\
\quad J/\psi(1S)\pi^{+} \pi^{-}) \quad \Gamma_{69} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S) / 12}
\end{array}
$$

<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>5.0&plusmn;0.4</td>
      <td>OUR FIT</td>
      <td colspan="3"></td>
    </tr>
    <tr>
      <td>7.1 &plusmn;3.1</td>
      <td>1.3</td>
      <td>8.3 &plusmn;3.7</td>
      <td>3.4</td>
      <td>1 BAI</td>
    </tr>
  </tbody>
</table>

¹BAI 03E reports [B(χ<sub>C2</sub> → ΛΛ̄) B(ψ(2S) → γχ<sub>C2</sub>) / B(ψ(2S) → J/ψπ<sup>+</sup>π<sup>-</sup>)] × [B<sup>2</sup>(Λ → π<sup>+</sup>p) / B(J/ψ → pρ̄)] = (1.33<sup>+0.59</sup><sub>-0.55</sub> ± 0.25)%. We calculate from this measurement the presented value using B(Λ → π<sup>-</sup>p) = (63.9 ± 0.5)% and B(J/ψ → pρ̄) = (2.17 ± 0.07) × 10<sup>-3</sup>.

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow \Lambda\bar{\Lambda}\eta) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) / \Gamma_{\text{total}} \\
\quad \Gamma_{74} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S)}
\end{array}
$$

<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>1.00&plusmn;0.20&plusmn;0.14</td>
      <td>32</td>
      <td>ABLIKIM</td>
      <td>22AO BES3</td>
      <td>ψ(2S) → γpπ<sup>-</sup>π<sup>+</sup>γγ</td>
    </tr>
  </tbody>
</table>

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow \pi\pi) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) / \Gamma_{\text{total}} \\
\quad \Gamma_{25} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S)}
\end{array}
$$

<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>2.12&plusmn;0.08</td>
      <td>OUR FIT</td>
      <td colspan="3"></td>
    </tr>
    <tr>
      <td>2.17&plusmn;0.09</td>
      <td>OUR AVERAGE</td>
      <td colspan="3"></td>
    </tr>
  </tbody>
</table>

<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>2.19&plusmn;0.05&plusmn;0.15</td>
      <td>4.5k</td>
      <td>1 ABLIKIM</td>
      <td>10A</td>
      <td>BES3 e<sup>+</sup>e<sup>-</sup> → ψ(2S) → γχ<sub>C2</sub></td>
    </tr>
    <tr>
      <td>2.23&plusmn;0.06&plusmn;0.10</td>
      <td>2.5k</td>
      <td>2 ASNER</td>
      <td>09</td>
      <td>CLEO ψ(2S) → γπ<sup>+</sup>π<sup>-</sup></td>
    </tr>
    <tr>
      <td>1.90&plusmn;0.08&plusmn;0.20</td>
      <td>0.8k</td>
      <td>3 ASNER</td>
      <td>09</td>
      <td>CLEO ψ(2S) → γπ<sup>0</sup>π<sup>0</sup></td>
    </tr>
  </tbody>
</table>

¹Calculated by us. ABLIKIM 10A reports B(χ<sub>C2</sub> → π<sub>0</sub>π<sub>0</sub>) = (0.88 ± 0.02) ± 0.06 ± 0.04) × 10<sup>-3</sup> using B(ψ(2S) → γχ<sub>C2</sub>) = (8.3 ± 0.4)%. We have multiplied the π<sub>0</sub>π<sub>0</sub> measurement by 3 to obtain ππ.

²Calculated by us. ASNER 09 reports B(χ<sub>C2</sub> → π<sup>+</sup>π<sup>-</sup>) = (1.59 ± 0.04) ± 0.07 ± 0.10) × 10<sup>-3</sup> using B(ψ(2S) → γχ<sub>C2</sub>) = (9.33 ± 0.14 ± 0.61)%. We have multiplied the π<sup>+</sup>π<sup>-</sup> measurement by 3/2 to obtain ππ.

³Calculated by us. ASNER 09 reports B(χ<sub>C2</sub> → π<sub>0</sub>π<sub>0</sub>) = (0.68 ± 0.03) ± 0.07 ± 0.04) × 10<sup>-3</sup> using B(ψ(2S) → γχ<sub>C2</sub>) = (9.33 ± 0.14 ± 0.61)%. We have multiplied the π<sub>0</sub>π<sub>0</sub> measurement by 3 to obtain ππ.

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow \pi\pi) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) / \Gamma(\psi(2S) \rightarrow \\
\quad J/\psi(1S)\pi^{+} \pi^{-}) \quad \Gamma_{25} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S) / 12}
\end{array}
$$

<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>0.611&plusmn;0.024</td>
      <td>OUR FIT</td>
      <td colspan="3"></td>
    </tr>
  </tbody>
</table>

<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>0.54 &plusmn;0.06</td>
      <td>OUR AVERAGE</td>
      <td colspan="3"></td>
    </tr>
    <tr>
      <td>0.66 &plusmn;0.18</td>
      <td>0.37</td>
      <td>21</td>
      <td>6</td>
      <td>1 BAI</td>
    </tr>
    <tr>
      <td>0.54 &plusmn;0.05</td>
      <td>0.04</td>
      <td>185</td>
      <td>16</td>
      <td>2 BAI</td>
    </tr>
  </tbody>
</table>

¹We have multiplied π<sup>0</sup>π<sup>0</sup> measurement by 3 to obtain ππ.

²Calculated by us. The value for B(χ<sub>C2</sub> → π<sup>+</sup>π<sup>-</sup>) reported by BAI 98i is derived using B(ψ(2S) → γχ<sub>C2</sub>) = (7.8 ± 0.8)% and B(ψ(2S) → J/ψπ<sup>+</sup>π<sup>-</sup>) = (32.4 ± 2.6)% [BAI 98D]. We have multiplied π<sup>+</sup>π<sup>-</sup> measurement by 3/2 to obtain ππ.

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow \eta\eta) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) / \Gamma_{\text{total}} \\
\quad \Gamma_{31} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S)}
\end{array}
$$

<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>0.52&plusmn;0.04</td>
      <td>OUR FIT</td>
      <td colspan="3"></td>
    </tr>
    <tr>
      <td>0.52&plusmn;0.04</td>
      <td>OUR AVERAGE</td>
      <td colspan="3"></td>
    </tr>
  </tbody>
</table>

<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>0.54&plusmn;0.03</td>
      <td>0.04</td>
      <td>386</td>
      <td>1 ABLIKIM</td>
      <td>10A BES3 e<sup>+</sup>e<sup>-</sup> → ψ(2S) → γχ<sub>C2</sub></td>
    </tr>
    <tr>
      <td>0.47&plusmn;0.05</td>
      <td>0.05</td>
      <td>156</td>
      <td>ASNER</td>
      <td>09 CLEO ψ(2S) → γηη</td>
    </tr>
  </tbody>
</table>

<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>0.47&plusmn;0.31</td>
      <td>0.19</td>
      <td>156</td>
      <td>LEE</td>
      <td>CBAL ψ(2S) → photons</td>
    </tr>
  </tbody>
</table>

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

<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>&lt; 0.44</td>
      <td>90</td>
      <td>2 ADAMS</td>
      <td>07</td>
      <td>CLEO ψ(2S) → γχ<sub>C2</sub></td>
    </tr>
    <tr>
      <td>&lt; 3</td>
      <td>90</td>
      <td>3C BAI</td>
      <td>03C BES</td>
      <td>ψ(2S) → γηη → 5γ</td>
    </tr>
    <tr>
      <td>0.62&plusmn;0.31</td>
      <td>0.19</td>
      <td>LEE</td>
      <td>85</td>
      <td>CBAL ψ(2S) → photons</td>
    </tr>
  </tbody>
</table>

¹Calculated by us. ABLIKIM 10A reports B(χ<sub>C2</sub> → ηη) = (0.65 ± 0.04) ± 0.05) × 0.03) × 10⁻⁵ using B(ψ(2S) → γχ<sub>C2</sub>) = (8.3 ± 0.4)%.

²Superseded by ASNER 09.

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow K^{+} K^{-}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c2}(1P)) / \Gamma_{\text{total}} \\
\quad \Gamma_{32} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S)}
\end{array}
$$

<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>9.5&plusmn;1.4</td>
      <td>OUR FIT</td>
      <td colspan="3">Error includes scale factor of 2.4.</td>
    </tr>
  </tbody>
</table>

<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>10.5&plusmn;0.3</td>
      <td>0.3</td>
      <td>1.6k</td>
      <td>1 ASNER</td>
      <td>09 CLEO ψ(2S) → γK<sup>+</sup> K<sup>-</sup></td>
    </tr>
  </tbody>
</table>

¹Calculated by us. ASNER 09 reports B(χ<sub>C2</sub> → K<sup>+</sup>K<sup>-</sup>) = (1.13 ± 0.03) ± 0.06 ± 0.07) × 10<sup>-3</sup> using B(ψ(2S) → γχ<sub>C2</sub>) = (9.33 ± 0.14 ± 0.61)%.

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow K^{+} K^{-}) / \Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c2}(1P)) / \Gamma(\psi(2S) \rightarrow \\
\quad J/\psi(1S)\pi^{+} \pi^{-}) \quad \Gamma_{32} / \Gamma \times \Gamma^{\psi(2S) / 181} / \Gamma^{\psi(2S) / 12}
\end{array}
$$

<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>0.27 &plusmn;0.04</td>
      <td>OUR FIT</td>
      <td colspan="3">Error includes scale factor of 2.4.</td>
    </tr>
  </tbody>
</table>

<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>0.190&plusmn;0.034</td>
      <td>0.019</td>
      <td>115 &plusmn;13</td>
      <td>1 BAI</td>
      <td>98i BES ψ(2S) → γK<sup>+</sup> K<sup>-</sup></td>
    </tr>
  </tbody>
</table>

¹Calculated by us. The value for B(χ<sub>C2</sub> → K<sup>+</sup>K<sup>-</sup>) reported by BAI 98i is derived using B(ψ(2S) → γχ<sub>C2</sub>) = (7.8 ± 0.8)% and B(ψ(2S) → J/ψπ<sup>+</sup>π<sup>-</sup>) = (32.4 ± 2.6)% [BAI 98D].
$$\Gamma(\chi_{c2}(1P) \rightarrow K_S^0 K_S^0)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma_{\text{total}} \quad \Gamma_{33}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻⁵) EVTS

### 5.0 ±0.4 OUR FIT

#### 5.0 ±0.4 OUR AVERAGE

<table><tr><td>4.9 ±0.3 ±0.3</td><td>373 ± 20</td><td>1 ASNER</td><td>09</td><td>CLEO</td><td>ψ(2S) → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr><tr><td>5.72 ±0.76 ±0.63</td><td>65</td><td>ABLIKIM</td><td>050</td><td>BES2</td><td>ψ(2S) → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr></table>

¹Calculated by us. ASNER 09 reports $B(\chi_{c2} \rightarrow K_S^0 K_S^0) = (0.53 \pm 0.03 \pm 0.03) \times 10^{-3}$ using $B(\psi(2S) \rightarrow \gamma\chi_{c2}) = (9.33 \pm 0.14 \pm 0.61)\%$.

$$\Gamma(\chi_{c2}(1P) \rightarrow K_S^0 K_S^0)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{33}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻⁵) EVTS

### 14.3 ±1.1 OUR FIT

#### 14.3 ±4.1 ±3.3

<table><tr><td>1 BAI</td><td>99B</td><td>BES</td><td>ψ(2S) → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr></table>

¹Calculated by us. The value of $B(\chi_{c2} \rightarrow K_S^0 K_S^0)$ reported by BAI 99B was derived using $B(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) = (7.8 \pm 0.8)\%$ and $B(\psi(2S) \rightarrow J/\psi\pi^+\pi^-) = (32.4 \pm 2.6)\%$ [BAI 98D].

$$\Gamma(\chi_{c2}(1P) \rightarrow \bar{K}^0 K^+\pi^- + \text{c.c.})/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma_{\text{total}} \quad \Gamma_{42}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻⁴) EVTS

### 1.22 ±0.17 OUR FIT

#### 1.15 ±0.18 OUR AVERAGE

<table><tr><td>1.21 ±0.19 ±0.09</td><td>37</td><td>1 ATHAR</td><td>07</td><td>CLEO</td><td>ψ(2S) → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>π</sup>π<sup>−</sup></td></tr><tr><td>0.97 ±0.32 ±0.13</td><td>28</td><td>2 ABLIKIM</td><td>06R</td><td>BES2</td><td>ψ(2S) → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>π</sup>π<sup>−</sup></td></tr></table>

¹Calculated by us. ATHAR 07 reports $B(\chi_{c2} \rightarrow \bar{K}^0 K^+\pi^- + \text{c.c.}) = (1.3 \pm 0.2 \pm 0.1 \pm 0.1) \times 10^{-3}$ using $B(\psi(2S) \rightarrow \gamma\chi_{c2}) = (9.33 \pm 0.14 \pm 0.61)\%$.

²Calculated by us. ABLIKIM 06r reports $B(\chi_{c2} \rightarrow K_S^0 K_S^\pm\pi^+) = (0.6 \pm 0.2 \pm 0.1) \times 10^{-3}$ using $B(\psi(2S) \rightarrow \gamma\chi_{c2}) = (8.1 \pm 0.6)\%$. We have multiplied by 2 to obtain $\bar{K}^0 K^+\pi^- + \text{c.c.}$ from $K_S^0 K_S^\pm\pi^+\pi^-\%$.

$$\Gamma(\chi_{c2}(1P) \rightarrow 2(\pi^+\pi^-))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{1}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻³) EVTS

### 2.7 ±0.4 OUR FIT Error includes scale factor of 1.4.

#### 3.1 ±1.0 OUR AVERAGE Error includes scale factor of 2.5.

<table><tr><td>2.3 ±0.1 ±0.5</td><td>1 BAI</td><td>99B</td><td>BES</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr><tr><td>4.3 ±0.6</td><td>2 TANENBAUM</td><td>78</td><td>MRK1</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr></table>

¹Calculated by us. The value for $B(\chi_{c2} \rightarrow 2\pi^+\pi^-)$ reported in BAI 99B is derived using $B(\psi(2S) \rightarrow \gamma\chi_{c2}) = (7.8 \pm 0.8)\%$ and $B(\psi(2S) \rightarrow J/\psi(1S)\pi^+\pi^-) = (32.4 \pm 2.6)\%$ [BAI 98D].

²The value for $B(\psi(2S) \rightarrow \gamma\chi_{c2}) \times B(\chi_{c2} \rightarrow 2\pi^+\pi^-)$ reported in TANENBAUM 78 is derived using $B(\psi(2S) \rightarrow J/\psi(1S)\pi^+\pi^-) \times B(J/\psi(1S)\pi^+\pi^-) = (4.6 \pm 0.7)\%$. Calculated by us using $B(J/\psi(1S) \rightarrow \ell^+\ell^-) = 0.1181 \pm 0.0020$.

$$\Gamma(\chi_{c2}(1P) \rightarrow K^+ K^- K^+ K^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma_{\text{total}} \quad \Gamma_{51}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻⁴) EVTS

### 1.56 ±0.21 OUR FIT Error includes scale factor of 1.1.

<table><tr><td>1.76 ±0.16 ±0.24</td><td>160</td><td>1 ABLIKIM</td><td>06T</td><td>BES2</td><td>ψ(2S) → γ2K<sup>+</sup> 2K<sup>−</sup></td></tr></table>

$$\Gamma(\chi_{c2}(1P) \rightarrow K^+ K^- K^+ K^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{51}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻⁴) EVTS

### 4.5 ±0.6 OUR FIT Error includes scale factor of 1.1.

<table><tr><td>3.6 ±0.6 ±0.6</td><td>1 BAI</td><td>99B</td><td>BES</td><td>ψ(2S) → γ2K<sup>+</sup> 2K<sup>−</sup></td></tr></table>

$$\Gamma(\chi_{c2}(1P) \rightarrow \phi\phi)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma_{\text{total}} \quad \Gamma_{20}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻⁴) EVTS

### 1.15 ±0.07 OUR FIT Error includes scale factor of 1.8.

#### 0.98 ±0.13 OUR AVERAGE Error includes scale factor of 1.3.

<table><tr><td>0.94 ±0.03 ±0.10</td><td>849</td><td>1 ABLIKIM</td><td>11K</td><td>BES3</td><td>ψ(2S) → γ hadrons</td></tr><tr><td>1.38 ±0.24 ±0.23</td><td>41</td><td>2 ABLIKIM</td><td>06T</td><td>BES2</td><td>ψ(2S) → γ2K<sup>+</sup> 2K<sup>−</sup></td></tr></table>

¹Calculated by us. The value of $B(\chi_{c2} \rightarrow \phi\phi)$ reported by ABLIKIM 11K was derived using $B(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) = (8.74 \pm 0.35)\%$.

²Calculated by us. The value of $B(\chi_{c2} \rightarrow \phi\phi)$ reported by ABLIKIM 06T was derived using $B(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) = (8.1 \pm 0.4)\%$.

$$\Gamma(\chi_{c2}(1P) \rightarrow \phi\phi)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma(\psi(2S) \rightarrow J/\psi(1S)\pi^+\pi^-) \quad \Gamma_{20}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻⁴) EVTS

### 3.31 ±0.21 OUR FIT Error includes scale factor of 1.7.

<table><tr><td>4.8 ±1.3 ±1.3</td><td>1 BAI</td><td>99B</td><td>BES</td><td>ψ(2S) → γ2K<sup>+</sup> 2K<sup>−</sup></td></tr></table>

¹Calculated by us. The value of $B(\chi_{c2} \rightarrow \phi\phi)$ reported by BAI 99B was derived using $B(\psi(2S) \rightarrow \gamma\chi_{c2}(1P)) = (7.8 \pm 0.8)\%$ and $B(\psi(2S) \rightarrow J/\psi\pi^+\pi^-) = (32.4 \pm 2.6)\%$ [BAI 98D].

$$\Gamma(\chi_{c2}(1P) \rightarrow \Sigma^+ \bar{P} K_S^0 + \text{c.c.})/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma_{\text{total}} \quad \Gamma_{81}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻⁶) EVTS

<table><tr><td>7.85 ±0.77 ±0.44</td><td>129</td><td>1 ABLIKIM</td><td>19BB</td><td>BES3</td><td>ψ(2S) → γΣ<sup>+</sup> P K<sub>S</sub><sup>0</sup> + c.c.</td></tr></table>

¹Calculated by us. ABLIKIM 19BB reports $B(\chi_{c2} \rightarrow \Sigma^+ \bar{P} K_S^0 + \text{c.c.}) = (8.25 \pm 0.83 \pm 0.49) \times 10^{-5}$ using $B(\psi(2S) \rightarrow \gamma\chi_{c2}) = (9.52 \pm 0.20)\%$ and other branching fractions from PDG 18.

$$\Gamma(\chi_{c2}(1P) \rightarrow \Sigma^0 \bar{P} K^+ + \text{c.c.})/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma_{\text{total}} \quad \Gamma_{82}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻⁵) EVTS

<table><tr><td>0.87 ±0.06 ±0.04</td><td>271</td><td>1 ABLIKIM</td><td>20AE</td><td>BES3</td><td>ψ(2S) → γΣ<sup>0</sup> P K<sup>+</sup> + c.c.</td></tr></table>

¹Calculated by us. ABLIKIM 20AE reports $B(\chi_{c2} \rightarrow \Sigma^0 \bar{P} K^+ + \text{c.c.}) = (0.91 \pm 0.06 \pm 0.05) \times 10^{-4}$ using $B(\psi(2S) \rightarrow \gamma\chi_{c2}) = (9.52 \pm 0.20)\%$ and other branching fractions from PDG 20.

$$\Gamma(\chi_{c2}(1P) \rightarrow \gamma J/\psi(1S))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma_{\text{total}} \quad \Gamma_{94}/\Gamma \times \Gamma_{181}^{\psi(2S)}/\Gamma^{\psi(2S)}$$

VALUE (units 10⁻²) EVTS

### 1.82 ±0.07 OUR FIT Error includes scale factor of 1.9.

### 1.69 ±0.16 OUR AVERAGE Error includes scale factor of 3.4. See the ideogram below.

<table><tr><td>1.99 ±0.008 ±0.070</td><td>81k</td><td>1 ABLIKIM</td><td>17N</td><td>BES3</td><td>ψ(2S) → γγ J/ψ</td></tr><tr><td>1.793 ±0.008 ±0.163</td><td>1.0M</td><td>ABLIKIM</td><td>17U</td><td>BES3</td><td>e<sup>+</sup> e<sup>−</sup> → γX</td></tr><tr><td>1.62 ±0.04 ±0.12</td><td>5.8k</td><td>BAI</td><td>04I</td><td>BES2</td><td>ψ(2S) → J/ψγγ</td></tr><tr><td>0.99 ±0.10 ±0.08</td><td></td><td>GAISER</td><td>86</td><td>CBAL</td><td>ψ(2S) → γX</td></tr><tr><td>1.47 ±0.17</td><td></td><td>2 OREGLIA</td><td>82</td><td>CBAL</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr><tr><td>1.8 ±0.5</td><td></td><td>3 BRANDELIK</td><td>79B</td><td>DASP</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr><tr><td>1.2 ±0.2</td><td></td><td>3 BARTEL</td><td>78B</td><td>CNTR</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr><tr><td>2.2 ±1.2</td><td></td><td>4 BIDDICK</td><td>77</td><td>CNTR</td><td>e<sup>+</sup> e<sup>−</sup> → γX</td></tr><tr><td>1.2 ±0.7</td><td></td><td>2 WHITAKER</td><td>76</td><td>MRK1</td><td>e<sup>+</sup> e<sup>+</sup></td></tr></table>

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

<table><tr><td>1.874 ±0.007 ±0.102</td><td>76k</td><td>5 ABLIKIM</td><td>120B</td><td>BES3</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr><tr><td>1.95 ±0.02 ±0.07</td><td>12.4k</td><td>6 MENDEZ</td><td>08</td><td>CLEO</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr><tr><td>1.85 ±0.04 ±0.07</td><td>1.9k</td><td>7 ADAM</td><td>05A</td><td>CLEO</td><td>Repl. by MENDEZ 08</td></tr></table>

¹Uses $B(J/ψ \rightarrow e^+e^-) = (5.971 \pm 0.032)\%$ and $B(J/ψ \rightarrow μ^+μ^-) = (5.961 \pm 0.033)\%$.

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

³Recalculated by us using $B(J/ψ(1S) \rightarrow μ^+μ^-) = 0.0588 \pm 0.0010$.

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.

### WEIGHTED AVERAGE 1.69±0.16 (Error scaled by 3.4)

<figure><img src="image_667.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.

$$\Gamma(\chi_{c2}(1P) \rightarrow \gamma J/\psi(1S))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma_{\text{total}} \text{ (units } 10^{-2})$$
$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow \gamma J/\psi(1S))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma \chi_{c2}(1P))/\Gamma(\psi(2S) \rightarrow \\
\quad J/\psi(1S) \pi^{+} \pi^{-}) \quad \Gamma_{94}/\Gamma \times \Gamma^{(2S)}_{181}/\Gamma^{(2S)}_{12}
\end{array}
$$

<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>

5.26±0.19 OUR FIT Error includes scale factor of 1.8.

5.53±0.17 OUR AVERAGE

<table><tr><td>5.56±0.05±0.16</td><td>12.4k</td><td>MENDEZ</td><td>08</td><td>CLEO</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr><tr><td>6.0 ±2.8</td><td>1.3k</td><td>1 ABLIKIM</td><td>04b</td><td>BES</td><td>ψ(2S) → J/ψX</td></tr><tr><td>3.9 ±1.2</td><td></td><td>2 HIMEL</td><td>80</td><td>MRK2</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr></table>

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

<table><tr><td>5.52±0.13±0.13</td><td>1.9k</td><td>3 ADAM</td><td>05a</td><td>CLEO</td><td>Repl. by MENDEZ 08</td></tr></table>

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

²The value for $B(\psi(2S) \rightarrow \gamma\chi_{c2}) \times B(\chi_{c2} \rightarrow \gamma J/\psi(1S))$ reported in HIMEL 80 is derived using $B(\psi(2S) \rightarrow J/\psi(1S)\pi^+\pi^-) = (33 \pm 3)\%$ and $B(J/\psi(1S) \rightarrow \ell^+\ell^-) = 0.138 \pm 0.018$. Calculated by us using $B(J/\psi(1S) \rightarrow \ell^+\ell^-) = (0.1181 \pm 0.0020)$.

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

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow \gamma\gamma)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \rightarrow \gamma\chi_{c2}(1P))/\Gamma_{\text{total}} \\
\quad \Gamma_{98}/\Gamma \times \Gamma^{(2S)}_{181}/\Gamma^{(2S)}
\end{array}
$$

<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>

2.74±0.10 OUR FIT Error includes scale factor of 1.3.

2.82±0.10 OUR AVERAGE

<table><tr><td>2.83±0.08±0.06</td><td>5k</td><td>1 ABLIKIM</td><td>17AE</td><td>BES3</td><td>ψ(2S) → γχ<sub>c2</sub> → 3γ</td></tr><tr><td>2.68±0.28±0.15</td><td>0.3k</td><td>ECKLUND</td><td>08A</td><td>CLEO</td><td>ψ(2S) → γχ<sub>c2</sub> → 3γ</td></tr><tr><td>7.0 ±2.1 ±2.0</td><td></td><td>LEE</td><td>85</td><td>CBAL</td><td>ψ(2S) → γχ<sub>c2</sub></td></tr></table>

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

<table><tr><td>2.81±0.17±0.15</td><td>1.1k</td><td>2 ABLIKIM</td><td>12A</td><td>BES3</td><td>ψ(2S) → γχ<sub>c2</sub> → 3γ</td></tr></table>

¹ABLIKIM 17AE measures the ratio of two-photon partial widths for the helicity $\lambda = 0$ and helicity $\lambda = 2$ components to be $f_{0/2} = \Gamma_{\gamma\gamma}^{\lambda=0}/\Gamma_{\gamma\gamma}^{\lambda=2} = 0.000 \pm 0.006 \pm 0.012$.

²ABLIKIM 12A measures the ratio of two-photon partial widths for the helicity $\lambda = 0$ and helicity $\lambda = 2$ components to be $f_{0/2} = \Gamma_{\gamma\gamma}^{\lambda=0}/\Gamma_{\gamma\gamma}^{\lambda=2} = 0.00 \pm 0.02 \pm 0.02$. Superseded by ABLIKIM 17AE.

$$
\begin{array}{l}
\Gamma(\chi_{c2}(1P) \rightarrow \gamma\gamma)/\Gamma(\chi_{c0}(1P) \rightarrow \gamma\gamma) \quad \Gamma_{98}/\Gamma^{(2S)}_{96}(1P) \\
\quad 0.292 \pm 0.028 \text{ OUR AVERAGE}
\end{array}
$$

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

<table><tr><td>0.295±0.014±0.028</td><td>8k</td><td>1 ABLIKIM</td><td>17AE</td><td>BES3</td><td>ψ(2S) → γχ<sub>cJ</sub> → 3γ</td></tr><tr><td>0.278±0.050±0.036</td><td>0.5k</td><td>1 ECKLUND</td><td>08A</td><td>CLEO</td><td>ψ(2S) → γχ<sub>cJ</sub> → 3γ</td></tr></table>

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

<table><tr><td>0.271±0.029±0.030</td><td>1.9k</td><td>1,2 ABLIKIM</td><td>12A</td><td>BES3</td><td>ψ(2S) → γχ<sub>cJ</sub> → 3γ</td></tr></table>

¹Not independent from the values of $\Gamma(\chi_{c0}, \chi_{c2})$ and $B(\psi(2S) \rightarrow \chi_{c0}, \chi_{c2})$.

²Superseded by ABLIKIM 17AE.

MULTIPOLE AMPLITUDES IN $\chi_{c2}(1P) \rightarrow \gamma J/\psi(1S)$ RADIATIVE DECAY

$$
\begin{array}{l}
a_2 = M_2/\sqrt{E1^2 + M2^2 + E3^2} \quad \text{Magnetic quadrupole fractional transition amplitude}
\end{array}
$$

<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>

-11.0± 1.0 OUR AVERAGE

<table><tr><td>-12.0± 1.3±0.4</td><td>89k</td><td>1 ABLIKIM</td><td>17N</td><td>BES3</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>- 9.3± 1.6±0.3</td><td>19.8k</td><td>2 ARTUSO</td><td>09</td><td>CLEO</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>- 9.3<sup>+3</sup><sub>-4.1</sub>±0.6</td><td>5.9k</td><td>3 AMBROGIANI</td><td>02</td><td>E835</td><td>p<span style="text-decoration: overline;">p</span> → χ<sub>c2</sub> → J/ψγ</td></tr><tr><td>-14 ± 6</td><td>1.9k</td><td>3 ARMSTRONG</td><td>93E</td><td>E760</td><td>p<span style="text-decoration: overline;">p</span> → χ<sub>c2</sub> → J/ψγ</td></tr><tr><td>-33.3<sup>+11.6</sup><sub>-29.2</sub></td><td>441</td><td>3 OREGLIA</td><td>82</td><td>CBAL</td><td>ψ(2S) → χ<sub>c1</sub>γ → J/ψγγ</td></tr></table>

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

<table><tr><td>- 7.9± 1.9±0.3</td><td>19.8k</td><td>4 ARTUSO</td><td>09</td><td>CLEO</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr></table>

¹Correlated with $a_3$, $b_2$, and $b_3$ with correlation coefficients $\rho_{a_2}a_3 = 0.733$, $\rho_{a_2}b_2 = -0.605$, and $\rho_{b_2}b_3 = -0.095$.

²From a fit with floating M2 amplitudes $a_2$ and $b_2$, and fixed E3 amplitudes $a_3=b_3=0$.

³Assuming $a_3=0$.

⁴From a fit with floating M2 and E3 amplitudes $a_2$, $b_2$, and $a_3$, and $b_3$.

$$
\begin{array}{l}
a_3 = E3/\sqrt{E1^2 + M2^2 + E3^2} \quad \text{Electric octupole fractional transition amplitude} \\
\text{tude}
\end{array}
$$

<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>

-0.3±1.0 OUR AVERAGE Error includes scale factor of 1.3. See the ideogram below.

<table><tr><td>-1.3±0.9±0.4</td><td>89k</td><td>1 ABLIKIM</td><td>17N</td><td>BES3</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>1.7±1.4±0.3</td><td>19.8k</td><td>2 ARTUSO</td><td>09</td><td>CLEO</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>2.0<sup>+5.5</sup><sub>-4.4</sub>±0.9</td><td>5908</td><td>AMBROGIANI</td><td>02</td><td>E835</td><td>p<span style="text-decoration: overline;">p</span> → χ<sub>c2</sub> → J/ψγ</td></tr><tr><td>0<sup>+6</sup><sub>-5</sub></td><td>1904</td><td>ARMSTRONG</td><td>93E</td><td>E760</td><td>p<span style="text-decoration: overline;">p</span> → χ<sub>c2</sub> → J/ψγ</td></tr></table>

¹Correlated with $a_2$, $b_2$, and $b_3$ with correlation coefficients $\rho_{a_2}a_3 = 0.733$, $\rho_{a_2}b_3 = -0.024$, and $\rho_{b_2}b_3 = -0.024$.

²From a fit with floating M2 and E3 amplitudes $a_2$, $b_2$, and $a_3$, and $b_3$.

WEIGHTED AVERAGE
-0.3±1.0 (Error scaled by 1.3)

<figure><img src="image_668.png" /></figure>

$a_3 = E3/\sqrt{E1^2 + M2^2 + E3^2}$ Electric octupole fractional transition amplitude (units $10^{-2}$)

MULTIPOLE AMPLITUDES IN $\psi(2S) \rightarrow \gamma\chi_{c2}(1P)$ RADIATIVE DECAY

$$
\begin{array}{l}
b_2 = M2/\sqrt{E1^2 + M2^2 + E3^2} \quad \text{Magnetic quadrupole fractional transition amplitude}
\end{array}
$$

<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>

1.9±0.9 OUR AVERAGE

<table><tr><td>1.7±0.8±0.2</td><td>89k</td><td>1 ABLIKIM</td><td>17N</td><td>BES3</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>4.6±1.0±1.3</td><td>13.8k</td><td>2 ABLIKIM</td><td>11N</td><td>BES3</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup>, γK<sup>+</sup>K<sup>-</sup></td></tr><tr><td>0.2±1.5±0.4</td><td>19.8k</td><td>3 ARTUSO</td><td>09</td><td>CLEO</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>- 5.1<sup>+5.4</sup><sub>-3.6</sub></td><td>721</td><td>2 ABLIKIM</td><td>04I</td><td>BES2</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup>, γK<sup>+</sup>K<sup>-</sup></td></tr><tr><td>13.2<sup>+9.8</sup><sub>-7.5</sub></td><td>441</td><td>4 OREGLIA</td><td>82</td><td>CBAL</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr></table>

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

<table><tr><td>1.0±1.3±0.3</td><td>19.8k</td><td>4 ARTUSO</td><td>09</td><td>CLEO</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr></table>

¹Correlated with $a_2$, $a_3$, and $b_3$ with correlation coefficients $\rho_{a_2}b_2 = -0.605$, $\rho_{a_3}b_2 = -0.422$, and $\rho_{b_2}b_3 = 0.384$.

²From a fit with floating M2 and E3 amplitudes $b_2$ and $b_3$.

³From a fit with floating M2 and E3 amplitudes $a_2$, $b_2$, and $a_3$, and $b_3$.

⁴From a fit with floating M2 amplitudes $a_2$ and $b_2$, and fixed E3 amplitudes $a_3=b_3=0$.

WEIGHTED AVERAGE
1.9±0.9 (Error scaled by 1.4)

<figure><img src="image_669.png" /></figure>

$b_2 = M2/\sqrt{E1^2 + M2^2 + E3^2}$ Magnetic quadrupole fractional transition amplitude (units $10^{-2}$)

$$
\begin{array}{l}
b_3 = E3/\sqrt{E1^2 + M2^2 + E3^2} \quad \text{Electric octupole fractional transition amplitude}
\end{array}
$$

<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>

-1.0±0.6 OUR AVERAGE

<table><tr><td>-1.4±0.7±0.4</td><td>89k</td><td>1 ABLIKIM</td><td>17N</td><td>BES3</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>1.5±0.8±1.8</td><td>13.8k</td><td>2 ABLIKIM</td><td>11N</td><td>BES3</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup>, γK<sup>+</sup>K<sup>-</sup></td></tr><tr><td>-0.8±1.2±0.2</td><td>19.8k</td><td>ARTUSO</td><td>09</td><td>CLEO</td><td>ψ(2S) → γγℓ<sup>+</sup>ℓ<sup>-</sup></td></tr><tr><td>-2.7<sup>+4.3</sup><sub>-2.9</sub></td><td>721</td><td>2 ABLIKIM</td><td>04I</td><td>BES2</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup>, γK<sup>+</sup>K<sup>-</sup></td></tr></table>

¹Correlated with $a_2$, $a_3$, and $b_2$ with correlation coefficients $\rho_{a_2}b_3 = -0.095$, $\rho_{a_3}b_3 = -0.024$, and $\rho_{b_2}b_3 = 0.384$.

²From a fit with floating M2 and E3 amplitudes $b_2$ and $b_3$.
MULTIPOLE AMPLITUDE RATIOS IN RADIATIVE DECAYS

$\psi(2S) \rightarrow \gamma\chi_{c2}(1P)$ and $\chi_{c2} \rightarrow \gamma J/\psi(1S)$

$b_2/a_2$ Magnetic quadrupole transition amplitude ratio

<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>-11<sup>+14</sup><sub>-15</sub></td><td>19.8k</td><td>1 ARTUSO</td><td>09</td><td>CLEO ψ(2S) → γγe<sup>-</sup>ℓ<sup>-</sup></td></tr></tbody></table>

¹ Statistical and systematic errors combined. From a fit with floating M2 amplitudes $a_2$ and $b_2$, and fixed E3 amplitudes $a_3=b_3=0$. Not independent of values for $a_2(\chi_{c2}(1P))$ and $b_2(\chi_{c2}(1P))$ from ARTUSO 09.

$\chi_{c2}(1P)$ REFERENCES

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Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13V</td><td>PR D88 112001</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>UEHARA</td><td>13</td><td>PTEP 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>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12I</td><td>PR D86 052004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><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>LEES</td><td>12AE</td><td>PR D86 092005</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LIU</td><td>12E</td><td>PR D86 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>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>11F</td><td>PR D83 112009</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>11L</td><td>PR D84 092006</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11M</td><td>PRL 107 092001</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>DEL-AMO-SA...11M</td><td>11A</td><td>PR D84 012004</td><td>P. del Amo Sanchez et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABLIKIM</td><td>10A</td><td>PR D81 052005</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ONYISI</td><td>10A</td><td>PR D82 011103</td><td>P.U.E. Onyisi et al.</td><td>(CLEO Collab.)</td></tr><tr><td>UEHARA</td><td>10A</td><td>PR D82 0114031</td><td>S. Uehara et al.</td><td>(BELLE 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>09</td><td>PR D79 072004</td><td>D.M. Asner et al.</td><td>(CLEO Collab.)</td></tr><tr><td>UEHARA</td><td>09</td><td>PR D79 052009</td><td>S. Uehara et al.</td><td>(BELLE Collab.)</td></tr><tr><td>BENNETT</td><td>08A</td><td>PRL 101 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>(BESIII 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>UEHARA</td><td>08</td><td>EPJ C53 1</td><td>S. Uehara et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ADAMS</td><td>07</td><td>PR D75 071101</td><td>G.S. Adams 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>CHEN</td><td>07B</td><td>PL B651 15</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>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06I</td><td>PR D74 012004</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><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>DDBBS</td><td>06</td><td>PR D73 071101</td><td>S. Dobbis et al.</td><td>(CLEO 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>05N</td><td>PL B630 7</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>05O</td><td>PL B630 21</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ADAM</td><td>05A</td><td>PRL 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>M. Andreotti et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>AKAZAWA</td><td>05</td><td>PL B615 39</td><td>H. Nakazawa et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>04B</td><td>PR D70 012003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>04H</td><td>PR D70 092003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>04I</td><td>PR D70 092004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>BAI</td><td>04F</td><td>PR D69 092001</td><td>J.Z. Bai et al.</td><td>(BESIII Collab.)</td></tr><tr><td>BAI</td><td>04J</td><td>PR D70 012006</td><td>J.Z. Bai et al.</td><td>(BESIII Collab.)</td></tr><tr><td>AULCHENKO</td><td>03</td><td>PR D737 63</td><td>KEDR ESR et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>03C</td><td>PR D67 032004</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>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>ABE</td><td>02T</td><td>PL B540 33</td><td>K. Abe et al.</td><td>(BELLE 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>EISENSTEIN</td><td>02</td><td>PR D87 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>M. Ambrogiani et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>ACCIARRI</td><td>99E</td><td>PL B453 73</td><td>M. Acciarri et al.</td><td>(L3 Collab.)</td></tr><tr><td>BAI</td><td>99B</td><td>PR D60 072001</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>ACKER...K...</td><td>98</td><td>PL B439 197</td><td>K. Ackerstaff et al.</td><td>(OPAL Collab.)</td></tr><tr><td>BAI</td><td>96D</td><td>PR D58 092006</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>98</td><td>PL B301 391</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>DOMINICK</td><td>94</td><td>PR D50 4265</td><td>J. Dominick et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ARMSTRONG</td><td>93</td><td>PRL 70 2988</td><td>T.A. Armstrong et al.</td><td>(FNAL E760 Collab.)</td></tr><tr><td>ARMSTRONG</td><td>93E</td><td>PR D48 3037</td><td>T.A. Armstrong et al.</td><td>(FNAL-E760 Collab.)</td></tr><tr><td>BAUER</td><td>93</td><td>PR D302 345</td><td>D.A. Bauer et al.</td><td>(TPC Collab.)</td></tr><tr><td>ARMSTRONG</td><td>92</td><td>NP B373 35</td><td>T.A. Armstrong et al.</td><td>(FNAL, FERR, GENO+)</td></tr><tr><td>Also</td><td></td><td>PRL 68 1468</td><td>T.A. Armstrong et al.</td><td>(FNAL, FERR, GENO+)</td></tr><tr><td>BAGLIN</td><td>87B</td><td>PL B187 191</td><td>C. Baglin et al.</td><td>(R704 Collab.)</td></tr><tr><td>BAGLIN</td><td>86B</td><td>PL B172 455</td><td>C. Baglin</td><td>(LAPP, CERN, GENO, LYON, OSLO+)</td></tr><tr><td>GAISER</td><td>86</td><td>PR D34 711</td><td>J. Gaiser et al.</td><td>(Crystal Ball Collab.)</td></tr><tr><td>LEE</td><td>85</td><td>SLAC 282</td><td>R.A. Lee</td><td>(SLAC)</td></tr></tbody></table>

<table><tbody><tr><td>LEMOIGNE</td><td>82</td><td>PL 113B 509</td><td>Y. Lemoline et al.</td><td>(SACL, LOIC, SHMP+)</td></tr><tr><td>OREGLIA</td><td>82</td><td>PR D25 2259</td><td>M.J. Oreglia et al.</td><td>(SACL, CIT, HARV+)</td></tr><tr><td>Also</td><td></td><td>Private Comm.</td><td>M.J. Oreglia et al.</td><td>(EFI)</td></tr><tr><td>BARATE</td><td>81</td><td>PR D24 2994</td><td>R. Barate et al.</td><td>(SACL, LOIC, SHMP, CERN+)</td></tr><tr><td>HIMEL</td><td>80</td><td>PRL 44 920</td><td>T. Himel et al.</td><td>(LBL, SLAC)</td></tr><tr><td>Also</td><td></td><td>Private Comm.</td><td>G. Trilling</td><td>(LBL, UCB)</td></tr><tr><td>BRANDELIK</td><td>79B</td><td>NP 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.</td><td>(DESY, HEIDP)</td></tr><tr><td>TANENBAUM</td><td>78</td><td>PR D17 1731</td><td>W.M. Tanenbaum et al.</td><td>(SLAC, LBL)</td></tr><tr><td>Also</td><td></td><td>Private Comm.</td><td>G. Trilling</td><td>(LBL, UCB)</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>WHITAKER</td><td>76</td><td>PRL 37 1596</td><td>J.S. Whitaker et al.</td><td>(SLAC, LBL)</td></tr></tbody></table>

$$\eta_c(2S)$$

$$I^G(J^PC) = 0^+(-0^-)$$

Quantum numbers are quark model predictions.

$\eta_c(2S)$ 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><b>3637.7 ±0.9</b></td><td><b>OUR AVERAGE</b></td><td></td><td></td><td>Error includes scale factor of 1.2.</td></tr><tr><td>3637.90 ±0.54 ±1.40</td><td>3.7k</td><td>AAIJ</td><td>23AH LHCB</td><td>B<sup>+</sup> → K<sup>+</sup>(K<sup>0</sup> S K<sup>-</sup>)</td></tr><tr><td>3643.4 ±2.3 ±4.4</td><td>569</td><td>ABLIKIM</td><td>22q BES3</td><td>ψ(2S) → γ3(π<sup>+</sup> π<sup>-</sup>)</td></tr><tr><td>3635.1 ±3.7 ±2.9</td><td>106</td><td>XU</td><td>18 BELL</td><td>e<sup>+</sup> e<sup>-</sup> → e<sup>+</sup> e<sup>-</sup>η<sup>+</sup> π<sup>+</sup> π<sup>-</sup></td></tr><tr><td>3633.6 ±1.7 ±0.6</td><td>106</td><td>1 AAIJ</td><td>17AD LHCB</td><td>pp → B<sup>+</sup> X → p p̄ K<sup>+</sup> X</td></tr><tr><td>3636.4 ±4.1 ±0.7</td><td>365</td><td>2 AAIJ</td><td>17BB LHCB</td><td>pp → b b̄ X → 2(K<sup>+</sup> K<sup>-</sup>) X</td></tr><tr><td>3637.0 ±5.7 ±3.4</td><td>178</td><td>3,4 LEES</td><td>14E BABR</td><td>γγ → K<sup>+</sup> K<sup>-</sup> π<sup>0</sup></td></tr><tr><td>3635.1 ±5.8 ±2.1</td><td>47</td><td>3,5 LEES</td><td>14E BABR</td><td>γγ → K<sup>+</sup> K<sup>-</sup> η</td></tr><tr><td>3646.9 ±1.6 ±3.6</td><td>57</td><td>ABLIKIM</td><td>13K BES3</td><td>ψ(2S) → γK<sup>0</sup> S K<sup>±</sup> π<sup>+</sup> π<sup>+</sup> π<sup>-</sup></td></tr><tr><td>3637.6 ±2.9 ±1.6</td><td>127</td><td>6 ABLIKIM</td><td>12G BES3</td><td>ψ(2S) → γK<sup>0</sup> Kπ<sup>0</sup></td></tr><tr><td>3638.5 ±1.5 ±0.8</td><td>624</td><td>3 DEL-AMO-SA...11M</td><td>BABR</td><td>γγ → K<sup>0</sup> S K<sup>±</sup> π<sup>+</sup> π<sup>-</sup></td></tr><tr><td>3640.5 ±3.2 ±2.5</td><td>1201</td><td>3 DEL-AMO-SA...11M</td><td>BABR</td><td>γγ → K<sup>+</sup> K<sup>-</sup> π<sup>+</sup> π<sup>-</sup> π<sup>0</sup></td></tr><tr><td>3636.1 ±3.9 ±0.7</td><td>128</td><td>7 VINOKUROVA</td><td>11 BELL</td><td>B<sup>+</sup> → K<sup>+</sup>(K<sup>0</sup> S K<sup>±</sup> π<sup>+</sup>)</td></tr><tr><td>-4.2 ±2.0</td><td>128</td><td>8 ABE</td><td>07 BELL</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ(cτ)</td></tr><tr><td>3626 ±5 ±6</td><td>311</td><td>9 AUBERT</td><td>05C BABR</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψcτ</td></tr><tr><td>3645.0 ±5.5<sup>+4.9</sup><sub>-7.8</sub></td><td>121</td><td>ASNER</td><td>04 CLEO</td><td>γγ → η'<sub>C</sub> → K<sup>0</sup> S K<sup>±</sup> π<sup>-</sup></td></tr><tr><td>3642.9 ±3.1 ±1.5</td><td>61</td><td></td><td></td><td>K<sup>0</sup> S K<sup>±</sup> π<sup>+</sup></td></tr></tbody></table>

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

<table><tbody><tr><td>3639 ±7</td><td>98</td><td>9 AUBERT</td><td>06E BABR</td><td>B<sup>+</sup> → K<sup>+</sup> X̄C<sup>-</sup></td></tr><tr><td>3630.8 ±3.4 ±1.0</td><td>112</td><td>10 AUBERT</td><td>04D BABR</td><td>γγ → η<sup>+</sup>(2S) → K̄Cπ</td></tr><tr><td>3654 ±6 ±8</td><td>39</td><td>11 CHOI</td><td>02 BELL</td><td>B<sup>+</sup> → K̄KS K<sup>-</sup> π<sup>+</sup></td></tr><tr><td>3594 ±5</td><td>12</td><td>12 EDWARDS</td><td>82C CBAL</td><td>e<sup>+</sup> e<sup>-</sup> → γK</td></tr></tbody></table>

¹ AAIJ 17AD report $m_{ψ(2S)} - m_{η_c(2S)} = 52.5 \pm 1.7 \pm 0.6$ MeV. We use the current value $m_{ψ(2S)} = 3686.097 \pm 0.025$ MeV to obtain the quoted mass.

² From a fit of the $\phi\phi$ invariant mass with the width of $\eta_c(2S)$ fixed to the PDG 16 value.

³ Ignoring possible interference with continuum.

⁴ With a width fixed to 11.3 MeV.

⁵ With a width fixed to 11.3 MeV. Using both $\eta \rightarrow \gamma\gamma$ and $\eta \rightarrow \pi^+\pi^-\pi^0$ decays.

⁶ From a simultaneous fit to $K_S^0 K^\pm\pi^+$ and $K^+ K^- \pi^0$ decay modes.

⁷ Accounts for interference with non-resonant continuum.

⁸ From a fit of the $J/\psi$ recoil mass spectrum. Supersedes ABE, K 02 and ABE 04G.

⁹ From the fit of the kaon momentum spectrum. Systematic errors not evaluated.

¹⁰ Superseded by DEL-AMO-SANCHEZ 11M.

¹¹ Superseded by VINOKUROVA 11.

¹² Assuming mass of $\psi(2S) = 3686$ MeV.

$\eta_c(2S)$ WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>CL% EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>11.8 ± 1.6</b></td><td><b>OUR AVERAGE</b></td><td></td><td></td><td></td></tr><tr><td>10.77 ± 1.62 ± 1.08</td><td>3.7k</td><td>AAIJ</td><td>23AH LHCB</td><td>B<sup>+</sup> → K<sup>+</sup>(K<sup>0</sup> S K<sup>-</sup>)</td></tr><tr><td>19.8 ± 3.9 ± 3.1</td><td>569</td><td>ABLIKIM</td><td>22Q BES3</td><td>ψ(2S) → γ3(π<sup>+</sup> π<sup>-</sup>)</td></tr><tr><td>9.9 ± 4.8 ± 2.9</td><td>57</td><td>ABLIKIM</td><td>13K BES3</td><td>ψ(2S) → γK<sup>0</sup> S K<sup>±</sup> π<sup>+</sup> π<sup>-</sup></td></tr><tr><td>16.9 ± 6.4 ± 4.8</td><td>127</td><td>1 ABLIKIM</td><td>12G BES3</td><td>ψ(2S) → γK<sup>0</sup> Kπ<sup>0</sup></td></tr><tr><td>13.4 ± 4.6 ± 3.2</td><td>624</td><td>2 DEL-AMO-SA...11M</td><td>BABR</td><td>γγ → K<sup>0</sup> S K<sup>±</sup> π<sup>+</sup></td></tr><tr><td>6.6 ± 8.4 ± 2.6</td><td>128</td><td>3 VINOKUROVA</td><td>11 BELL</td><td>B<sup>+</sup> → K<sup>+</sup>(K<sup>0</sup> S K<sup>±</sup> π<sup>+</sup>)</td></tr><tr><td>6.3 ± 12.4 ± 4.0</td><td>61</td><td>ASNER</td><td>04 CLEO</td><td>γγ → η'<sub>C</sub> → K<sup>0</sup> S K<sup>±</sup> π<sup>+</sup></td></tr></tbody></table>

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

<table><tbody><tr><td>&lt;23</td><td>90</td><td>98</td><td>4 AUBERT</td><td>06E BABR</td><td>B<sup>+</sup> → K<sup>+</sup> X̄C<sup>-</sup></td></tr><tr><td>22 ±14</td><td>121</td><td>11 AUBERT</td><td>05C BABR</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψcτ</td></tr><tr><td>17.0 ± 8.3 ± 2.5</td><td>112</td><td>5 AUBERT</td><td>04D BABR</td><td>γγ → η<sup>+</sup>(2S) → K̄Cπ</td></tr><tr><td>&lt;55</td><td>90</td><td>39</td><td>6 CHOI</td><td>02 BELL</td><td>B<sup>+</sup> → K̄KS K<sup>-</sup> π<sup>+</sup></td></tr><tr><td>&lt;8.0</td><td>95</td><td>7 EDWARDS</td><td>82 C BAL</td><td>e<sup>+</sup> e<sup>-</sup> → γK</td></tr></tbody></table>

¹ From a simultaneous fit to $K_S^0 K^\pm\pi^+$ and $K^+ K^- \pi^0$ decay modes.
# Meson Particle Listings

## η_c(2S)

²Ignoring possible interference with continuum.

³Accounts for interference with non-resonant continuum.

⁴From the fit of the kaon momentum spectrum. Systematic errors not evaluated.

⁵Superseded by DEL-AMO-SANCHEZ 11M.

⁶For a mass value of 3654 ± 6 MeV. Superseded by VINOKUROVA 11.

⁷For a mass value of 3594 ± 5 MeV

## η_c(2S) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>i</sub>/Γ)</th><th>Confidence level</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> hadrons</td><td>seen</td><td></td></tr><tr><td>Γ<sub>2</sub> K<sup>+</sup>K<sup>-</sup>π</td><td>( 1.9±1.2 ) %</td><td></td></tr><tr><td>Γ<sub>3</sub> K<sup>+</sup>K<sup>-</sup>η</td><td>( 5 ± 4 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>4</sub> 2π<sup>+</sup>2π<sup>-</sup></td><td>&lt; 2.1 %</td><td>90%</td></tr><tr><td>Γ<sub>5</sub> ρ<sup>0</sup>ρ<sup>0</sup></td><td>&lt; 1.9 × 10<sup>-3</sup></td><td>90%</td></tr><tr><td>Γ<sub>6</sub> 3π<sup>+</sup>3π<sup>-</sup></td><td>( 1.3±0.9 ) %</td><td></td></tr><tr><td>Γ<sub>7</sub> K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup></td><td>&lt; 1.4 %</td><td>90%</td></tr><tr><td>Γ<sub>8</sub> K<sup>+</sup>K<sup>-</sup>K<sup>0</sup>π<sup>0</sup></td><td>&lt; 2.9 × 10<sup>-3</sup></td><td>90%</td></tr><tr><td>Γ<sub>9</sub> K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td>( 1.4±1.0 ) %</td><td></td></tr><tr><td>Γ<sub>10</sub> K<sup>+</sup>K<sup>-</sup>2π<sup>+</sup>2π<sup>-</sup></td><td>&lt; 1.4 %</td><td>90%</td></tr><tr><td>Γ<sub>11</sub> K<sup>0</sup>K<sup>-</sup>2π<sup>+</sup>π<sup>-</sup> + c.c.</td><td>( 1.0±0.8 ) %</td><td></td></tr><tr><td>Γ<sub>12</sub> 2K<sup>+</sup>2K<sup>-</sup></td><td>&lt; 1.3 × 10<sup>-3</sup></td><td>90%</td></tr><tr><td>Γ<sub>13</sub> φφ</td><td>&lt; 1.1 × 10<sup>-3</sup></td><td>90%</td></tr><tr><td>Γ<sub>14</sub> p<span style="text-decoration: overline">p</span>π<sup>+</sup>π<sup>-</sup></td><td>&lt; 2.0 × 10<sup>-3</sup></td><td>90%</td></tr><tr><td>Γ<sub>15</sub> p<span style="text-decoration: overline">p</span>π<sup>+</sup>π<sup>-</sup></td><td>seen</td><td></td></tr><tr><td>Γ<sub>16</sub> γγ</td><td>( 1.8±1.2 ) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>17</sub> γJ/ψ(1S)</td><td>&lt; 1.4 %</td><td>90%</td></tr><tr><td>Γ<sub>18</sub> π<sup>+</sup>π<sup>-</sup>η</td><td>( 4.3±3.2 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>19</sub> π<sup>+</sup>π<sup>-</sup>η'</td><td>( 2.6±1.9 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>20</sub> K<sup>2</sup>(1430)K<sup>-</sup> + c.c.</td><td>seen</td><td></td></tr><tr><td>Γ<sub>21</sub> K<sup>0</sup>(1950)K<sup>-</sup> + c.c.</td><td>seen</td><td></td></tr><tr><td>Γ<sub>22</sub> a<sub>0</sub>(1710)π</td><td>seen</td><td></td></tr><tr><td>Γ<sub>23</sub> a<sub>0</sub>(1450)π</td><td>seen</td><td></td></tr><tr><td>Γ<sub>24</sub> a<sub>2</sub>(1700)π</td><td>seen</td><td></td></tr><tr><td>Γ<sub>25</sub> K<sup>0</sup>(2600)K<sup>-</sup> + c.c.</td><td>seen</td><td></td></tr><tr><td>Γ<sub>26</sub> π<sup>+</sup>π<sup>-</sup>η<sub>c</sub>(1S)</td><td>&lt; 25 %</td><td>90%</td></tr></tbody></table>

## η_c(2S) PARTIAL WIDTHS

<table><thead><tr><th>Γ(γγ)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>16</sub></th></tr></thead></table>

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

<table><tr><td>0.44±0.14</td><td>106</td><td><sup>1</sup>XU</td><td>18</td><td>BELL</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup>η'<sub>c</sub>π<sup>+</sup>π<sup>-</sup></td></tr><tr><td>1.3 ± 0.6</td><td><sup>2</sup>ASNER</td><td>04</td><td>CLEO</td><td>γγ → η'<sub>c</sub> → K<sup>0</sup>S K<sup>±</sup>π<sup>∓</sup></td></tr></table>

¹Assuming that the branching fraction into η'π<sup>+</sup>π<sup>-</sup> is the same as for η_c(1S).

²They measure Γ(η_c(2S)γγ) B(η_c(2S) → K<sup>+</sup>K<sup>-</sup>π) = (0.18 ± 0.05 ± 0.02) Γ(η_c(1S)γγ) B(η_c(1S) → K<sup>+</sup>K<sup>-</sup>π). The value for Γ(η_c(2S) → γγ) is derived assuming that the branching fractions for η_c(2S) and η_c(1S) decays to K_S K_π are equal and using Γ(η_c(1S) → γγ) = 7.4 ± 0.4 ± 2.3 keV.

<table><thead><tr><th>Γ(γγ) × Γ(π<sup>+</sup>π<sup>-</sup>η')/Γ<sub>total</sub></th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>16</sub>Γ<sub>19</sub>/Γ</th></tr></thead><tbody><tr><td>5.6<sup>+1.2</sup><sub>-1.1</sub>±1.1</td><td>106</td><td>XU</td><td>18</td><td>BELL</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup>η'<sub>c</sub>π<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

## η_c(2S) Γ(i)Γ(γγ)/Γ(total)

<table><thead><tr><th>Γ(K<sup>+</sup>K<sup>-</sup>π) × Γ(γγ)/Γ<sub>total</sub></th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>2</sub>Γ<sub>16</sub>/Γ</th></tr></thead><tbody><tr><td>41±4±6</td><td>624</td><td>1 DEL-AMO-SA..11M</td><td>BABR</td><td>γγ → K<sup>0</sup>S K<sup>±</sup>π<sup>∓</sup></td><td></td></tr></tbody></table>

¹Not independent from other measurements reported in DEL-AMO-SANCHEZ 11M.

<table><thead><tr><th>Γ(2π<sup>+</sup>2π<sup>-</sup>) × Γ(γγ)/Γ<sub>total</sub></th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>4</sub>Γ<sub>16</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;6.5</td><td>90</td><td>UEHARA</td><td>08</td><td>BELL</td><td>γγ → η<sub>c</sub>(2S) → 2(π<sup>+</sup>π<sup>-</sup>)</td></tr></tbody></table>

<table><thead><tr><th>Γ(K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>) × Γ(γγ)/Γ<sub>total</sub></th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>7</sub>Γ<sub>16</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;5.0</td><td>90</td><td>UEHARA</td><td>08</td><td>BELL</td><td>γγ → η<sub>c</sub>(2S) → K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

<table><thead><tr><th>Γ(K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>) × Γ(γγ)/Γ<sub>total</sub></th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>9</sub>Γ<sub>16</sub>/Γ</th></tr></thead><tbody><tr><td>30±6±5</td><td>1201</td><td>1 DEL-AMO-SA..11M</td><td>BABR</td><td>γγ → K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td></td></tr></tbody></table>

¹Not independent from other measurements reported in DEL-AMO-SANCHEZ 11M.

<table><thead><tr><th>Γ(2K<sup>+</sup>2K<sup>-</sup>) × Γ(γγ)/Γ<sub>total</sub></th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>12</sub>Γ<sub>16</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;2.9</td><td>90</td><td>UEHARA</td><td>08</td><td>BELL</td><td>γγ → η<sub>c</sub>(2S) → 2(K<sup>+</sup>K<sup>-</sup>)</td></tr></tbody></table>

<table><thead><tr><th>Γ(π<sup>+</sup>π<sup>-</sup>η<sub>c</sub>(1S)) × Γ(γγ)/Γ<sub>total</sub></th><th>Γ<sub>26</sub>Γ<sub>16</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE (eV)</td><td>CL%</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>&lt;133</td><td>90</td><td>LEES</td><td>12AE</td><td>BABR</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup>π<sup>+</sup>π<sup>-</sup>η<sub>c</sub></td></tr></tbody></table>

## η_c(2S) Γ(i)Γ(γγ)/Γ<sup>2</sup>(total)

<table><thead><tr><th>Γ(p<span style="text-decoration: overline">p</span>)/Γ<sub>total</sub> × Γ(γγ)/Γ<sub>total</sub></th><th>Γ<sub>14</sub>/Γ × Γ<sub>16</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE (units 10<sup>-8</sup>)</td><td>CL%</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>&lt; 5.6</td><td>90</td><td>1,2,3 AMBROGIANI 01</td><td>E835</td><td>p<span style="text-decoration: overline">p</span> → γγ</td></tr></tbody></table>

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

<table><tr><td>&lt; 8.0</td><td>90</td><td>1,2,4 AMBROGIANI 01</td><td>E835</td><td>p<span style="text-decoration: overline">p</span> → γγ</td></tr><tr><td>&lt;12.0</td><td>90</td><td>2,4 AMBROGIANI 01</td><td>E835</td><td>p<span style="text-decoration: overline">p</span> → γγ</td></tr></table>

¹Including the measurements of ARMSTRONG 95F in the AMBROGIANI 01 analysis.

²For a total width Γ=5 MeV.

³For the resonance mass region 3589–3599 MeV/c².

⁴For the resonance mass region 3575–3660 MeV/c².

## η_c(2S) BRANCHING RATIOS

<table><thead><tr><th>Γ(hadrons)/Γ<sub>total</sub></th><th>Γ<sub>1</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>not seen</td><td>ABREU</td><td>980</td><td>DLPH e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup> + hadrons</td></tr></tbody></table>

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

<table><tr><td>seen</td><td>1 EDWARDS</td><td>82c</td><td>CBAL e<sup>+</sup>e<sup>-</sup> → γX</td></tr></table>

¹For a mass value of 3594 ± 5 MeV

<table><thead><tr><th>Γ(K<sup>+</sup>K<sup>-</sup>π)/Γ<sub>total</sub></th><th>Γ<sub>2</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE (units 10<sup>-2</sup>)</td><td>EVTS</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>1.9±0.4±1.1</td><td>59 ± 12</td><td>1 AUBERT</td><td>08AB</td><td>BABR B → η<sub>c</sub>(2S) K → K<sup>+</sup>K<sup>-</sup>πK</td></tr></tbody></table>

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

<table><tr><td>seen</td><td>127 ± 18</td><td>ABLIKIM</td><td>12G</td><td>BES3 ψ(2S) → γK<sup>+</sup>K<sup>-</sup>π</td></tr><tr><td>seen</td><td>39 ± 11</td><td>2 CHOI</td><td>02</td><td>BELL B → KKS K<sup>-</sup>π<sup>+</sup></td></tr></table>

¹Derived from a measurement of [B(B<sup>+</sup> → η<sub>c</sub>(2S)K<sup>+</sup>) × B(η<sub>c</sub>(2S) → K<sup>+</sup>K<sup>-</sup>π)] / [B(B<sup>+</sup> → η<sub>c</sub>K<sup>+</sup>) × B(η<sub>c</sub> → K<sup>+</sup>K<sup>-</sup>π)] = (9.6<sup>+2.0</sup><sub>-1.9</sub> ± 2.5)% and using B(B<sup>+</sup> → η<sub>c</sub>(2S)K<sup>+</sup>) = (3.4 ± 1.8) × 10<sup>-4</sup>, and [B(B<sup>+</sup> → η<sub>c</sub>K<sup>+</sup>) × B(η<sub>c</sub> → K<sup>+</sup>K<sup>-</sup>π)] = (6.88 ± 0.77<sup>+0.55</sup><sub>-0.66</sub>) × 10<sup>-5</sup>.

²For a mass value of 3654 ± 6 MeV

<table><thead><tr><th>Γ(K<sup>+</sup>K<sup>-</sup>η)/Γ(K<sup>+</sup>K<sup>-</sup>π)</th><th>Γ<sub>3</sub>/Γ<sub>2</sub></th></tr></thead><tbody><tr><td>VALUE (units 10<sup>-2</sup>)</td><td>EVTS</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>27.3±7.0±9.0</td><td>225</td><td>1 LEES</td><td>14E</td><td>BABR γγ → K<sup>+</sup>K<sup>-</sup>γγ</td></tr></tbody></table>

¹LEES 14E reports B(η_c(2S) → K<sup>+</sup>K<sup>-</sup>η)/B(η_c(2S) → K<sup>+</sup>K<sup>-</sup>π<sup>0</sup>) = 0.82 ± 0.21 ± 0.27, which we divide by 3 to account for isospin symmetry.

<table><thead><tr><th>Γ(2π<sup>+</sup>2π<sup>-</sup>)/Γ<sub>total</sub></th><th>Γ<sub>4</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr></tbody></table>

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

<table><tr><td>not seen</td><td>UEHARA</td><td>08</td><td>BELL γγ → η<sub>c</sub>(2S)</td></tr></table>

<table><thead><tr><th>Γ(ρ<sup>0</sup>ρ<sup>0</sup>)/Γ<sub>total</sub></th><th>Γ<sub>5</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr></tbody></table>

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

<table><tr><td>not seen</td><td>ABLIKIM</td><td>11H</td><td>BES3 ψ(2S) → γ2π<sup>+</sup>2π<sup>-</sup></td></tr></table>

<table><thead><tr><th>Γ(K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>)/Γ<sub>total</sub></th><th>Γ<sub>7</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr></tbody></table>

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

<table><tr><td>not seen</td><td>UEHARA</td><td>08</td><td>BELL γγ → η<sub>c</sub>(2S)</td></tr></table>

<table><thead><tr><th>Γ(K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>)/Γ<sub>total</sub></th><th>Γ<sub>8</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr></tbody></table>

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

<table><tr><td>not seen</td><td>ABLIKIM</td><td>11H</td><td>BES3 ψ(2S) → γK<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup></td></tr></table>

<table><thead><tr><th>Γ(K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>)/Γ(K<sup>+</sup>K<sup>-</sup>π)</th><th>Γ<sub>9</sub>/Γ<sub>2</sub></th></tr></thead><tbody><tr><td>VALUE</td><td>EVTS</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>0.73±0.17±0.17</td><td>1201</td><td>1 DEL-AMO-SA..11M</td><td>BABR γγ → K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td></td></tr></tbody></table>

¹We have multiplied the value of Γ(K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>)/Γ(K<sup>0</sup>S K<sup>±</sup>π<sup>∓</sup>) reported in DEL-AMO-SANCHEZ 11M by a factor 1/3 to obtain Γ(K<sup>+</sup>K<sup>-</sup>π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>)/Γ(K<sup>+</sup>K<sup>-</sup>π). Not independent from other measurements reported in DEL-AMO-SANCHEZ 11M.

<table><thead><tr><th>Γ(K<sup>0</sup>S K<sup>-</sup>2π<sup>+</sup>π<sup>-</sup> + c.c.)/Γ<sub>total</sub></th><th>Γ<sub>11</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE</td><td>EVTS</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr></tbody></table>

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

<table><tr><td>seen</td><td>57±17</td><td>ABLIKIM</td><td>13K</td><td>BES3 ψ(2S) → γK<sup>0</sup>S K<sup>±</sup>π<sup>+</sup>π<sup>-</sup></td></tr></table>

<table><thead><tr><th>Γ(2K<sup>+</sup>2K<sup>-</sup>)/Γ<sub>total</sub></th><th>Γ<sub>12</sub>/Γ</th></tr></thead><tbody><tr><td>VALUE</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr></tbody></table>

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

<table><tr><td>not seen</td><td>UEHARA</td><td>08</td><td>BELL γγ → η<sub>c</sub>(2S)</td></tr></table>
$$ \Gamma(\phi)/\Gamma_{\text{total}} \qquad \Gamma_{13}/\Gamma $$

DOCUMENT ID TECN COMMENT

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

not seen ABLIKIM 11H BES3 $\psi(2S) \to \gamma K^+ K^- K^+ K^-$

$$ \Gamma(p\bar{p})/\Gamma_{\text{total}} \qquad \Gamma_{14}/\Gamma $$

DOCUMENT ID TECN COMMENT

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

seen 106 $^{1}$AAIJ 17AD LHCB $p\bar{p} \to B^+ X \to p\bar{p} K^+ X$

$^{1}$AAIJ 17AD report a 6.4 standard deviation signal, with $B(B^+ \to \eta_c(2S) K^+ \to p\bar{p} K^+) / B(B^+ \to J/\psi K^+ \to p\bar{p} K^+) = (1.58 \pm 0.33 \pm 0.09) \times 10^{-2}$.

$$ \Gamma(p\bar{p}\pi^+\pi^-)/\Gamma_{\text{total}} \qquad \Gamma_{15}/\Gamma $$

DOCUMENT ID TECN COMMENT

seen 110 $^{1}$CHILIKIN 19 BELL $e^+ e^- \to \Gamma(4S)$

$^{1}$CHILIKIN 19 reports signals in $B^+ \to \eta_c(2S) K^+ $ and $B^0 \to \eta_c(2S) K^0_S$ with 12.3 and 5.9 standard deviations, respectively.

$$ \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \qquad \Gamma_{16}/\Gamma $$

DOCUMENT ID TECN COMMENT

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

<4 $\times 10^{-4}$ 90 $^{1}$WICHT 08 BELL $B^\pm \to K^\pm \gamma\gamma$
not seen AMBROGIANI 01 E835 $p\bar{p} \to \gamma\gamma$
<0.01 90 LEE 85 CBAL $\psi' \to$ photons

$^{1}$WICHT 08 reports $[\Gamma(\eta_c(2S) \to \gamma\gamma)/\Gamma_{\text{total}}] \times [B(B^+ \to \eta_c(2S) K^+) < 0.18 \times 10^{-6}$ which we divide by our best value $B(B^+ \to \eta_c(2S) K^+) = 4.4 \times 10^{-4}$.

$$ \Gamma(\pi^+\pi^-\eta_c(15))/\Gamma(K\bar{K}\pi) \qquad \Gamma_{26}/\Gamma $$

DOCUMENT ID TECN COMMENT

<3.33 90 $^{1}$LEES 12AE BABR $e^+ e^- \to e^+ e^- \pi^+ \pi^- \eta_c$

$^{1}$We divided the reported limit by 3 to take into account isospin relations.

### $\eta_c(2S)$ CROSS-PARTICLE BRANCHING RATIOS

$$ \Gamma(\eta_c(2S) \to K^+ K^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{3}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

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

<11.8 $\times 10^{-6}$ 90 $^{1}$CRONIN-HEN...10 CLEO $\psi(2S) \to \gamma K^+ K^- \eta$

$^{1}$CRONIN-HENNESSY 10 reports a limit of $< 5.9 \times 10^{-6}$ for the decay $\eta_c(2S) \to K^+ K^- \eta$ which we multiply by 2 account for isospin symmetry. It assumes $\Gamma(\eta_c(2S)) = 14$ MeV. It also gives the analytic dependence of limits on width.

$$ \Gamma(\eta_c(2S) \to 2\pi^+ 2\pi^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{4}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

<14.6 $\times 10^{-6}$ 90 $^{1}$CRONIN-HEN...10 CLEO $\psi(2S) \to \gamma 2\pi^+ 2\pi^-$

$^{1}$Assuming $\Gamma(\eta_c(2S)) = 14$ MeV. CRONIN-HENNESSY 10 gives the analytic dependence of limits on width.

$$ \Gamma(\eta_c(2S) \to \rho^0 \rho^0)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{5}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

<12.7 $\times 10^{-7}$ 90 ABLIKIM 11H BES3 $\psi(2S) \to \gamma 2\pi^+ 2\pi^-$

$$ \Gamma(\eta_c(2S) \to 3\pi^+ 3\pi^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{6}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

9.2 $\pm 1.0 \pm 1.2$ 569 ABLIKIM 22Q BES3 $\psi(2S) \to \gamma 3(\pi^+ \pi^-)$

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

<13.2 90 $^{1}$CRONIN-HEN...10 CLEO $\psi(2S) \to \gamma 3\pi^+ 3\pi^-$
$^{1}$Assuming $\Gamma(\eta_c(2S)) = 14$ MeV. CRONIN-HENNESSY 10 gives the analytic dependence of limits on width.

$$ \Gamma(\eta_c(2S) \to K^+ K^- \pi^+ \pi^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{7}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

$^{1}$Assuming $\Gamma(\eta_c(2S)) = 14$ MeV. CRONIN-HENNESSY 10 gives the analytic dependence of limits on width.

$$ \Gamma(\eta_c(2S) \to K^0 K^0)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{8}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

$$ \Gamma(\eta_c(2S) \to K^+ K^- \pi^+ \pi^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{9}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

<43.0 $\times 10^{-6}$ 90 CLEO $\psi(2S) \to \gamma K^+ K^- \pi^+ \pi^- \eta$

$^{1}$Assuming $\Gamma(\eta_c(2S)) = 14$ MeV. CRONIN-HENNESSY 10 gives the analytic dependence of limits on width.

$$ \Gamma(\eta_c(2S) \to K^+ K^- 2\pi^+ 2\pi^-)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{10}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

$^{1}$Assuming $\Gamma(\eta_c(2S)) = 14$ MeV. CRONIN-HENNESSY 10 gives the analytic dependence of limits on width.

$$ \Gamma(\eta_c(2S) \to K^0_S K^- 2\pi^+ \pi^- + \text{c.c.})/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{11}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

7.03 $\pm 2.10 \pm 0.7$ 60 ABLIKIM 13K BES3 $\psi(2S) \to \gamma K^0_S K^- 2\pi^+ \pi^- + \text{c.c.}$

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

<15.2 90 $^{1}$CRONIN-HEN...10 CLEO $\psi(2S) \to \gamma K^0_S K^- 2\pi^+ \pi^- + \text{c.c.}$

$^{1}$Assuming $\Gamma(\eta_c(2S)) = 14$ MeV. CRONIN-HENNESSY 10 gives the analytic dependence of limits on width.

$$ \Gamma(\eta_c(2S) \to \phi\phi)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{13}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

<7.8 $\times 10^{-7}$ 90 ABLIKIM 11H BES3 $\psi(2S) \to \gamma K^+ K^- K^+ K^-$

$$ \Gamma(\eta_c(2S) \to p\bar{p})/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{14}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

<1.4 $\times 10^{-6}$ 90 ABLIKIM 13V BES3 $\psi(2S) \to \gamma p\bar{p}$

$$ \Gamma(\eta_c(2S) \to \gamma J/\psi(15))/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{17}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

<9.7 $\times 10^{-6}$ 90 33 $^{1}$ABLIKIM 17N BES3 $\psi(2S) \to \gamma\gamma J/\psi$

$$ \Gamma(\eta_c(2S) \to \pi^+ \pi^- \eta)/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{18}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

2.97 $\pm 0.81 \pm 0.26$ 106 ABLIKIM 23Q BES3 $\psi(2S) \to \gamma \pi^+ \pi^- \eta$

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

<4.3 90 $^{1}$CRONIN-HEN...10 CLEO $\psi(2S) \to \gamma \pi^+ \pi^- \eta$

$$ \Gamma(\eta_c(2S) \to \pi^+ \pi^- \eta')/\Gamma_{\text{total}} \times \Gamma(\psi(2S) \to \gamma\eta_c(2S))/\Gamma_{\text{total}} \qquad \Gamma_{19}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma^{\psi(2S)} $$

DOCUMENT ID TECN COMMENT

<14.2 $\times 10^{-6}$ 90 $^{1}$CRONIN-HEN...10 CLEO $\psi(2S) \to \gamma \pi^+ \pi^- \eta'$

1 Assuming $\Gamma(\eta_c(2S)) = 14$ MeV. CRONIN-HENNESSY 10 gives the analytic dependence of limits on width.

$^{1}$Assuming $\Gamma(\eta_c(2S)) = 14$ MeV. CRONIN-HENNESSY 10 gives the analytic dependence of limits on width.

$$ \Gamma(K_2^0(1430)K^+ + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{20}/\Gamma $$

DOCUMENT ID TECN COMMENT

1 AAIJ 23AH LHCB $B^+ \to K^+ (K^0_S K \pi)$

$$ \Gamma(a_0(1710)\pi)/\Gamma_{\text{total}} \qquad \Gamma_{22}/\Gamma $$

DOCUMENT ID TECN COMMENT

1 AAIJ 23AH LHCB $B^+ \to K^+ (K^0_S K \pi)$

$$ \Gamma(a_0(1450)\pi)/\Gamma_{\text{total}} \qquad \Gamma_{23}/\Gamma $$

DOCUMENT ID TECN COMMENT

1 AAIJ 23AH LHCB $B^+ \to K^+ (K^0_S K \pi)$
$\Gamma(\partial_2(1700)\pi)/\Gamma_{\text{total}}$

VALUE

seen

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 AAIJ</td><td>23AH LHCB</td><td>B<sup>+</sup> → K<sup>+</sup>(K<sup>0</sup><sub>S</sub> Kπ)</td></tr></tbody></table>

$\Gamma_{24}/\Gamma$

¹ From a Dalitz plot analysis of $\eta_c(2S) \to K_S^0 K^+\pi^- + \text{c.c.}$.

$\Gamma(K_0^*(2600)\bar{K} + \text{c.c.})/\Gamma_{\text{total}}$

VALUE

seen

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 AAIJ</td><td>23AH LHCB</td><td>B<sup>+</sup> → K<sup>+</sup>(K<sup>0</sup><sub>S</sub> Kπ)</td></tr></tbody></table>

$\Gamma_{25}/\Gamma$

¹ From a Dalitz plot analysis of $\eta_c(2S) \to K_S^0 K^+\pi^- + \text{c.c.}$.

$\Gamma(K_0^*(1950)\bar{K} + \text{c.c.})/\Gamma_{\text{total}}$

VALUE

seen

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 AAIJ</td><td>23AH LHCB</td><td>B<sup>+</sup> → K<sup>+</sup>(K<sup>0</sup><sub>S</sub> Kπ)</td></tr></tbody></table>

$\Gamma_{21}/\Gamma$

¹ From a Dalitz plot analysis of $\eta_c(2S) \to K_S^0 K^+\pi^- + \text{c.c.}$.

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

$\Gamma_{26}/\Gamma \times \Gamma_{183}^{\psi(2S)}/\Gamma_{\psi(2S)}$

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;1.7 x 10<sup>-4</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 CRONIN-HEN...10</td><td>CLEO</td><td>ψ(2S) → γπ+π−ηc(1S)</td></tr></tbody></table>

¹ Assuming $\Gamma(\eta_c(2S)) = 14$ MeV. CRONIN-HENNESSY 10 gives the analytic dependence of limits on width.

### $\eta_c(2S)$ REFERENCES

<table><tbody><tr><td>AAIJ</td><td>23AH PR D108 032010</td><td>R. Aaij et al.</td><td>(LHCb Collab.)</td></tr><tr><td>ABLIKIM</td><td>23Q PR D107 052007</td><td>M. Alikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22Q PR D106 032014</td><td>M. Alikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>CHILIKIN</td><td>19 PR D100 012001</td><td>K. Chilikin et al.</td><td>(BELLE Collab.)</td></tr><tr><td>X</td><td>18 PR D98 072001</td><td>Q.N. Xu et al.</td><td>(BELLE Collab.)</td></tr><tr><td>AAIJ</td><td>17AD PL B769 305</td><td>R. Aaij et al.</td><td>(LHCb Collab.)</td></tr><tr><td>AAIJ</td><td>17BB EPJ C77 609</td><td>R. Aaij et al.</td><td>(LHCb Collab.)</td></tr><tr><td>ABLIKIM</td><td>17N PR D95 072004</td><td>M. Alikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>PDG</td><td>16 CP C40 100001</td><td>C. Patrignani et al.</td><td>(PDG Collab.)</td></tr><tr><td>LEES</td><td>14E PR D87 112004</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABLIKIM</td><td>13K PR D87 052005</td><td>M. Alikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13V PR D88 112001</td><td>M. Alikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12G PRL 109 042003</td><td>M. Alikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>LEES</td><td>12AE PR D86 092005</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABLIKIM</td><td>11H PR D84 091102</td><td>M. Alikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>DEL-AMO-SA...11M</td><td>PR D84 012004</td><td>P. del Amo Sanchez et al.</td><td>(BABAR Collab.)</td></tr><tr><td>VINOKUROVA</td><td>11 PL B706 139</td><td>A. Vinokurova et al.</td><td>(BELLE Collab.)</td></tr><tr><td>CRONIN-HEN...10</td><td>PR D81 052002</td><td>D. Cronin-Hennessey et al.</td><td>(CLEO Collab.)</td></tr><tr><td>AUBERT</td><td>08AB PR D78 012006</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>UEHARA</td><td>08 EPJ C53 1</td><td>S. Uehara et al.</td><td>(BELLE Collab.)</td></tr><tr><td>WICHT</td><td>08 PL B662 323</td><td>J. Wicht et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABE</td><td>07 PRL 98 082001</td><td>K. Abe et al.</td><td>(BELLE Collab.)</td></tr><tr><td>AUBERT</td><td>06E PRL 96 052002</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>AUBERT</td><td>05C PR D72 031101</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABE</td><td>04G PR D70 071102</td><td>K. Abe et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ASNER</td><td>04 PRL 92 142001</td><td>D.M. Asner et al.</td><td>(CLEO Collab.)</td></tr><tr><td>AUBERT</td><td>04D PRL 92 142002</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABE,K</td><td>02 PRL 89 142001</td><td>K. Abe et al.</td><td>(BELLE Collab.)</td></tr><tr><td>CHOI</td><td>02 PRL 89 102001</td><td>S.-K. Choi et al.</td><td>(BELLE Collab.)</td></tr><tr><td>AMBROGIANI</td><td>01 PR D64 052003</td><td>M. Ambrogiani et al.</td><td>(FNAL E835 Collab.)</td></tr><tr><td>ABREU</td><td>98D PL B441 479</td><td>P. Abreu et al.</td><td>(DELPHI Collab.)</td></tr><tr><td>ARMSTRONG</td><td>95F PR D52 4839</td><td>T.A. Armstrong et al.</td><td>(FNAL FERR. GENO+)</td></tr><tr><td>LEE</td><td>85 SLAC 282</td><td>R.A. Lee</td><td>(SLAC)</td></tr><tr><td>EDWARDS</td><td>82C PRL 48 70</td><td>C. Edwards et al.</td><td>(CIT, HARV, PRIN+)</td></tr></tbody></table>

$\psi(2S)$

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

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

### $\psi(2S)$ MASS

OUR FIT includes measurements of $m_{\psi(2S)}$, $m_{\psi(3770)}$, and $m_{\psi(3770)} - m_{\psi(2S)}$.

VALUE (MeV) EVTS DOCUMENT ID TECN COMMENT

3686.097±0.011 OUR FIT Error includes scale factor of 1.1.

3686.097±0.010 OUR AVERAGE

<table><tbody><tr><td>3686.099 ± 0.004 ± 0.009</td><td>1 ANASHIN</td><td>15 KEDR</td><td>e<sup>+</sup> e<sup>-</sup> → hadrons</td></tr><tr><td>3686.12 ± 0.06 ± 0.10</td><td>4k</td><td>AAIJ</td><td>12H LHCB p p → J/ψπ<sup>+</sup>π<sup>-</sup> X</td></tr><tr><td>3685.95 ± 0.10</td><td>413</td><td>2 ARTAMONOV</td><td>00 OLYA e<sup>+</sup> e<sup>-</sup> → hadrons</td></tr><tr><td>3685.98 ± 0.09 ± 0.04</td><td></td><td>3 ARMSTRONG</td><td>93B E760 p p → e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

<table><tbody><tr><td>3686.08 ± 0.07</td><td>1301</td><td>4 AAIJ</td><td>23AP LHCB B<sup>0</sup><sub>S</sub> → J/ψ2(π<sup>+</sup>π<sup>-</sup>)</td></tr><tr><td>3686.114 ± 0.007<sup>+0.011</sup><sub>-0.016</sub></td><td></td><td>5 ANASHIN</td><td>12 KEDR e<sup>+</sup> e<sup>-</sup> → hadrons</td></tr><tr><td>3686.111 ± 0.025 ± 0.009</td><td></td><td>AULCHENKO</td><td>03 KEDR e<sup>+</sup> e<sup>-</sup> → hadrons</td></tr><tr><td>3686.00 ± 0.10</td><td>413</td><td>6 ZHOLENTZ</td><td>80 OLYA e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ Supersedes AULCHENKO 03 and ANASHIN 12.

² Reanalysis of ZHOLENTZ 80 using new electron mass (COHEN 87) and radiative corrections (KURAEV 85).

³ Mass central value and systematic error recalculated by us according to Eq. (16) in ARMSTRONG 93B, using the value for the $J/\psi(1S)$ mass from AULCHENKO 03.

⁴ From a fit of a relativistic S-wave Breit-Wigner convolved with the detector resolution. The width of $\psi(2S)$ is constrained to the PDG 22 value. Systematic errors not evaluated.

⁵ From the scans in 2004 and 2006. ANASHIN 12 reports the value 3686.114 ± 0.007 ± 0.011 $^{+0.002}_{-0.012}$ MeV, where the third uncertainty is due to assumptions on the interference between the resonance and hadronic continuum. We combined the two systematic uncertainties.

⁶ Superseded by ARTAMONOV 00.

$m_{\psi(2S)} - m_{J/\psi(1S)}$

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>509.188±0.028 OUR AVERAGE</strong></td></tr><tr><td>589.194 ± 0.027 ± 0.011</td><td>1 AULCHENKO</td><td>03 KEDR</td><td>e<sup>+</sup> e<sup>-</sup> → hadrons</td></tr><tr><td>589.7 ± 1.2</td><td></td><td>LEMOIGNE</td><td>82 GOLI</td><td>185 π<sup>-</sup> Be → γπ<sup>+</sup>π<sup>-</sup> A</td></tr><tr><td>589.07 ± 0.13</td><td>1 ZHOLENTZ</td><td>80 OLYA</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>588.7 ± 0.8</td><td>LUTH</td><td>75</td><td>MRK1</td></tr></tbody></table>

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

<table><tbody><tr><td>588 ± 1</td><td>2 BAI</td><td>98E BES</td><td>e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ Redundant with data in mass above.

² Systematic errors not evaluated.

### $\psi(2S)$ WIDTH

VALUE (keV) EVTS DOCUMENT ID TECN COMMENT

293±9 OUR FIT Error includes scale factor of 1.2.

286±16 OUR AVERAGE

<table><tbody><tr><td>358 ± 88 ± 4</td><td></td><td>ABLIKIM</td><td>08B BES2</td><td>e<sup>+</sup> e<sup>-</sup> → hadrons</td></tr><tr><td>290 ± 25 ± 4</td><td>2.7k</td><td>ANDREOTTI</td><td>07 E835</td><td>p p → e<sup>+</sup> e<sup>-</sup>, J/ψX</td></tr><tr><td>331 ± 58 ± 2</td><td></td><td>ABLIKIM</td><td>06L BES2</td><td>e<sup>+</sup> e<sup>-</sup> → hadrons</td></tr><tr><td>264 ± 27</td><td></td><td>1 BAI</td><td>02B BES2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>287 ± 37 ± 16</td><td></td><td>2 ARMSTRONG</td><td>93B E760</td><td>p p → e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ From a simultaneous fit to the hadronic and $\mu^+\mu^-$ cross section, assuming $\Gamma = \Gamma_h + \Gamma_e + \Gamma_\mu + \Gamma_\tau$ and lepton universality. Does not include vacuum polarization correction.

² The initial-state radiation correction reevaluated by ANDREOTTI 07 in its Ref. [4].

### $\psi(2S)$ 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>Γ<sub>1</sub> hadrons</td><td>(97.85 ± 0.13 ) %</td><td></td></tr><tr><td>Γ<sub>2</sub> virtual γ → hadrons</td><td>(1.79 ± 0.04 ) %</td><td></td></tr><tr><td>Γ<sub>3</sub> g g g</td><td>(10.6 ± 1.6 ) %</td><td></td></tr><tr><td>Γ<sub>4</sub> γ g g</td><td>(1.03 ± 0.29 ) %</td><td></td></tr><tr><td>Γ<sub>5</sub> light hadrons</td><td>(15.4 ± 1.5 ) %</td><td></td></tr><tr><td>Γ<sub>6</sub> K<sup>0</sup><sub>S</sub> anything</td><td>(16.0 ± 1.1 ) %</td><td></td></tr><tr><td>Γ<sub>7</sub> e<sup>+</sup> e<sup>-</sup></td><td>(7.94 ± 0.22 ) × 10<sup>-3</sup></td><td>S=1.3</td></tr><tr><td>Γ<sub>8</sub> μ<sup>+</sup> μ<sup>-</sup></td><td>(8.0 ± 0.6 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>9</sub> τ<sup>+</sup> τ<sup>-</sup></td><td>(3.1 ± 0.4 ) × 10<sup>-3</sup></td><td></td></tr></tbody></table>

### Decays into $J/\psi(1S)$ and anything

<table><tbody><tr><td>Γ<sub>10</sub> J/ψ(1S) anything</td><td>(61.5 ± 0.7 ) %</td><td>S=1.3</td></tr><tr><td>Γ<sub>11</sub> J/ψ(1S) neutrals</td><td>(25.4 ± 0.5 ) %</td><td>S=1.6</td></tr><tr><td>Γ<sub>12</sub> J/ψ(1S) π<sup>+</sup>π<sup>-</sup></td><td>(34.69 ± 0.34 ) %</td><td>S=1.1</td></tr><tr><td>Γ<sub>13</sub> J/ψ(1S) π<sup>0</sup>π<sup>0</sup></td><td>(18.2 ± 0.5 ) %</td><td>S=1.6</td></tr><tr><td>Γ<sub>14</sub> J/ψ(1S) η</td><td>(3.37 ± 0.06 ) %</td><td>S=1.2</td></tr><tr><td>Γ<sub>15</sub> J/ψ(1S) π<sup>0</sup></td><td>(1.268 ± 0.032 ) × 10<sup>-3</sup></td><td></td></tr></tbody></table>

### Hadronic decays

<table><tbody><tr><td>Γ<sub>16</sub> π<sup>+</sup>π<sup>-</sup></td><td>(7.8 ± 2.6 ) × 10<sup>-6</sup></td><td></td></tr><tr><td>Γ<sub>17</sub> π<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td>(2.01 ± 0.17 ) × 10<sup>-4</sup></td><td>S=1.7</td></tr><tr><td>Γ<sub>18</sub> ρ(770) π → π<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td>(3.2 ± 1.2 ) × 10<sup>-5</sup></td><td>S=1.8</td></tr><tr><td>Γ<sub>19</sub> ρ(2150) π → π<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td>(1.9 <sup>+1.2</sup><sub>-0.4</sub>) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>20</sub> 2(π<sup>+</sup>π<sup>-</sup>)</td><td>(2.4 ± 0.6 ) × 10<sup>-4</sup></td><td>S=2.2</td></tr><tr><td>Γ<sub>21</sub> ρ<sup>0</sup>π<sup>+</sup>π<sup>-</sup></td><td>(2.2 ± 0.6 ) × 10<sup>-4</sup></td><td>S=1.4</td></tr><tr><td>Γ<sub>22</sub> 2(π<sup>+</sup>π<sup>-</sup>)π<sup>0</sup></td><td>(2.9 ± 1.0 ) × 10<sup>-3</sup></td><td>S=4.7</td></tr><tr><td>Γ<sub>23</sub> ρ∂<sub>2</sub>(1320)</td><td>(2.6 ± 0.9 ) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>24</sub> π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>π<sup>0</sup></td><td>(5.3 ± 1.0 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>25</sub> ρ<sup>+</sup>π<sup>+</sup>π<sup>0</sup>π<sup>0</sup></td><td>&lt; 2.7 × 10<sup>-3</sup></td><td>CL=90%</td></tr><tr><td>Γ<sub>26</sub> π<sup>+</sup>π<sup>-</sup>4π<sup>0</sup></td><td>(1.4 ± 1.0 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>27</sub> 3(π<sup>+</sup>π<sup>-</sup>)</td><td>(3.5 ± 2.0 ) × 10<sup>-4</sup></td><td>S=2.8</td></tr><tr><td>Γ<sub>28</sub> 2(π<sup>+</sup>π<sup>-</sup>)π<sup>0</sup></td><td>(4.8 ± 1.5 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>29</sub> 3(π<sup>+</sup>π<sup>-</sup>)π<sup>0</sup></td><td>(3.5 ± 1.6 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>30</sub> 2(π<sup>+</sup>π<sup>-</sup>)3π<sup>0</sup></td><td>(1.42 ± 0.31 ) %</td><td></td></tr><tr><td>Γ<sub>31</sub> ηπ<sup>+</sup>π<sup>-</sup></td><td>&lt; 1.6 × 10<sup>-4</sup></td><td>CL=90%</td></tr><tr><td>Γ<sub>32</sub> ηπ<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td>(9.5 ± 1.7 ) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>33</sub> η2(π<sup>+</sup>π<sup>-</sup>)</td><td>(1.2 ± 0.6 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>34</sub> ηπ<sup>+</sup>π<sup>-</sup>π<sup>0</sup>π<sup>0</sup></td><td>&lt; 4 × 10<sup>-4</sup></td><td>CL=90%</td></tr><tr><td>Γ<sub>35</sub> ηπ<sup>+</sup>π<sup>-</sup>3π<sup>0</sup></td><td>&lt; 2.1 × 10<sup>-3</sup></td><td>CL=90%</td></tr><tr><td>Γ<sub>36</sub> η2(π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>)</td><td>&lt; 2.1 × 10<sup>-3</sup></td><td>CL=90%</td></tr><tr><td>Γ<sub>37</sub> ρη</td><td>(2.2 ± 0.6 ) × 10<sup>-5</sup></td><td>S=1.1</td></tr><tr><td>Γ<sub>38</sub> η'π<sup>+</sup>π<sup>-</sup>π<sup>0</sup></td><td>(4.5 ± 2.1 ) × 10<sup>-4</sup></td><td></td></tr></tbody></table>