<table><tr><td>1.10 ± 0.17</td><td>0.17 ± 0.18</td><td>486</td><td>EATON</td><td>84</td><td>MRK2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>1.6 ± 0.3</td><td></td><td>77</td><td>PERUZZI</td><td>78</td><td>MRK1</td><td>e<sup>+</sup> e<sup>-</sup></td></tr></table>

WEIGHTED AVERAGE
0.98±0.10 (Error scaled by 1.3)

<figure><img src="image_657.png" /></figure>

$\Gamma(\bar{p}\pi'/(958))/\Gamma_{\text{total}} \qquad \Gamma_{214}/\Gamma$

<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 colspan="5"><strong>0.129 ± 0.014</strong> OUR AVERAGE</td></tr><tr><td>0.126 ± 0.002</td><td>0.007</td><td>16k</td><td>1 ABLIKIM</td><td>19N BES3 e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>0.200 ± 0.023</td><td>0.028</td><td>265 ± 31</td><td>2 ABLIKIM</td><td>09 BES2 e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>0.68 ± 0.23</td><td>0.17</td><td>19</td><td>EATON</td><td>84 MRK2 e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>1.8 ± 0.6</td><td></td><td>19</td><td>PERUZZI</td><td>78 MRK1 e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ From the combination of $p\bar{p}\eta' \to p\bar{p}\pi^+\pi^-\eta$ and $p\bar{p}\eta' \to p\bar{p}\pi^+\pi^-\gamma$ channels.

² From the combination of $p\bar{p}\eta' \to p\bar{p}\pi^+\pi^-\eta$ and $p\bar{p}\eta' \to p\bar{p}\gamma\pi^0$ channels.

$\Gamma(p\bar{p}a_0(980) \to p\bar{p}\pi^0\eta)/\Gamma_{\text{total}} \qquad \Gamma_{215}/\Gamma$

<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>6.8 ± 1.2</td><td>1 ± 1.3</td><td>ABLIKIM</td><td>14N BES3</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

$\Gamma(p\bar{p}\phi)/\Gamma_{\text{total}} \qquad \Gamma_{216}/\Gamma$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.519 ± 0.033</td><td>OUR AVERAGE</td><td>ABLIKIM</td><td>16K BES3</td><td>J/ψ → p\bar{p}\kappa<sup>0</sup> S K<sub>L</sub><sup>0</sup>,<br>p\bar{p}\kappa<sup>+</sup> K<sup>-</sup></td></tr><tr><td>0.523 ± 0.006</td><td>0.033</td><td>14k</td><td>FALVARD</td><td>88 DM2 J/ψ → hadrons</td></tr></tbody></table>

$\Gamma(p\bar{p}\pi^-)/\Gamma_{\text{total}} \qquad \Gamma_{217}/\Gamma$

<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 colspan="5"><strong>2.12 ± 0.09</strong> OUR AVERAGE</td></tr><tr><td>2.36 ± 0.02</td><td>0.21</td><td>59k</td><td>ABLIKIM</td><td>06K BES2 J/ψ → p\pi^-\bar{n}</td></tr><tr><td>2.47 ± 0.02</td><td>0.24</td><td>55k</td><td>ABLIKIM</td><td>06K BES2 J/ψ → p\bar{p}\pi^+\eta</td></tr><tr><td>2.02 ± 0.07</td><td>0.16</td><td>1288</td><td>EATON</td><td>84 MRK2 e<sup>+</sup> e<sup>-</sup> → p\pi<sup>-</sup></td></tr><tr><td>1.93 ± 0.07</td><td>0.16</td><td>1191</td><td>EATON</td><td>84 MRK2 e<sup>+</sup> e<sup>-</sup> → p\bar{p}\pi<sup>+</sup></td></tr><tr><td>1.7 ± 0.7</td><td></td><td>32</td><td>BESCH</td><td>81 BONA e<sup>+</sup> e<sup>-</sup> → p\pi<sup>-</sup></td></tr><tr><td>1.6 ± 1.2</td><td></td><td>5</td><td>BESCH</td><td>81 BONA e<sup>+</sup> e<sup>-</sup> → p\bar{p}\pi<sup>+</sup></td></tr><tr><td>2.16 ± 0.29</td><td></td><td>194</td><td>PERUZZI</td><td>78 MRK1 e<sup>+</sup> e<sup>-</sup> → p\pi<sup>-</sup></td></tr><tr><td>2.04 ± 0.27</td><td></td><td>204</td><td>PERUZZI</td><td>78 MRK1 e<sup>+</sup> e<sup>-</sup> → p\bar{p}\pi<sup>+</sup></td></tr></tbody></table>

$\Gamma(n\bar{n})/\Gamma_{\text{total}} \qquad \Gamma_{218}/\Gamma$

<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 colspan="5"><strong>2.09 ± 0.16</strong> OUR AVERAGE</td></tr><tr><td>2.07 ± 0.01</td><td>0.17</td><td>36k</td><td>ABLIKIM</td><td>12c BES3 e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>2.31 ± 0.49</td><td></td><td>79</td><td>BALDINI</td><td>98 FENI e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>1.8 ± 0.9</td><td></td><td></td><td>BESCH</td><td>78 BONA e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •
1.90 ± 0.55 40 ANTONELLI 93 SPEC e<sup>+</sup> e<sup>-</sup>

$\Gamma(n\bar{n}\pi^+\pi^-)/\Gamma_{\text{total}} \qquad \Gamma_{219}/\Gamma$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.8 ± 3.6</td><td></td><td>BESCH</td><td>81 BONA e<sup>+</sup> e<sup>-</sup></td><td></td></tr></tbody></table>

$\Gamma(\Lambda\bar{\Lambda})/\Gamma_{\text{total}} \qquad \Gamma_{223}/\Gamma$

<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 colspan="5"><strong>1.88 ± 0.08</strong> OUR AVERAGE</td></tr><tr><td>1.64 ± 0.12</td><td>0.12</td><td>441k</td><td>ABLIKIM</td><td>23s BES3 e<sup>+</sup> e<sup>-</sup> → γΛΛ</td></tr><tr><td>1.943 ± 0.003</td><td>0.033</td><td>8887</td><td>ABLIKIM</td><td>17l BES3 e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>2.03 ± 0.03</td><td>0.15</td><td>8887</td><td>ABLIKIM</td><td>06 BES2 J/ψ → ΛΛ</td></tr><tr><td>1.96 ± 0.47</td><td>0.44</td><td>46</td><td>1 WU</td><td>06 BELL B<sup>+</sup> → ΛΛK<sup>+</sup></td></tr><tr><td>1.08 ± 0.06</td><td>0.24</td><td>631</td><td>BAI</td><td>98G BES e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

<table><tr><td>1.38 ± 0.05</td><td>0.20</td><td>1847</td><td>PALLIN</td><td>87 DM2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>1.58 ± 0.08</td><td>0.19</td><td>365</td><td>EATON</td><td>84 MRK2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>2.6 ± 1.6</td><td></td><td>5</td><td>BESCH</td><td>81 BONA</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>1.1 ± 0.2</td><td></td><td>196</td><td>PERUZZI</td><td>78 MRK1</td><td>e<sup>+</sup> e<sup>-</sup></td></tr></table>

¹ WU 06 reports $[\Gamma(J/\psi(1S) \to \Lambda\bar{\Lambda})/\Gamma_{\text{total}}] \times [B(B^+ \to J/\psi(1S) K^+) = (2.00^{+0.34}_{-0.29} \pm 0.34) \times 10^{-6}$ which we divide by our best value $B(B^+ \to J/\psi(1S) K^+) = (1.020 \pm 0.019) \times 10^{-3}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

WEIGHTED AVERAGE
1.88±0.08 (Error scaled by 2.6)

<figure><img src="image_658.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.

$\Gamma(\Lambda\bar{\Lambda}\pi^0)/\Gamma_{\text{total}} \qquad \Gamma_{224}/\Gamma$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.78 ± 0.27</td><td>0.30</td><td>323</td><td>1 ABLIKIM</td><td>13F BES3</td><td>J/ψ → p\bar{p}\pi^+\pi^-\gamma\gamma</td></tr></tbody></table>

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

<table><tr><td>&lt; 6.4</td><td>90</td><td>11</td><td>BAI</td><td>98G BES</td><td>e<sup>+</sup> e<sup>-</sup> → ψ(2S)</td></tr><tr><td>23 ± 7</td><td>± 8</td><td>19</td><td>HENRARD</td><td>87 DM2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>22 ± 5</td><td>± 5</td><td>19</td><td></td><td></td><td>e<sup>+</sup> e<sup>-</sup></td></tr></table>

¹ Using $B(\Lambda \to \pi^- \pi^+) = 63.9\%$ and $B(\eta \to \gamma\gamma) = 98.8\%$.

² Using $B(\Lambda \to \pi^- \pi^+) = 63.9\%$.

$\Gamma(\Lambda\bar{\Lambda}\pi^+\pi^-)/\Gamma_{\text{total}} \qquad \Gamma_{225}/\Gamma$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.30 ± 0.13</td><td>0.99</td><td>2.4k</td><td>ABLIKIM</td><td>12P BES2</td><td>J/ψ</td></tr></tbody></table>

$\Gamma(\Lambda\bar{\Lambda}\eta)/\Gamma_{\text{total}} \qquad \Gamma_{226}/\Gamma$

<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 colspan="5"><strong>16.2 ± 1.7</strong> OUR AVERAGE</td></tr><tr><td>15.7 ± 0.80</td><td>1.54</td><td>454</td><td>1 ABLIKIM</td><td>13F BES3</td><td>J/ψ → p\bar{p}\pi^+\pi^-\gamma\gamma</td></tr><tr><td>26.2 ± 6.0</td><td>4.4</td><td>44</td><td>2 ABLIKIM</td><td>07H BES2</td><td>e<sup>+</sup> e<sup>-</sup> → ψ(2S)</td></tr></tbody></table>

¹ Using $B(\Lambda \to \pi^- \pi^+) = 63.9\%$ and $B(\eta \to \gamma\gamma) = 39.31\%$.

² Using $B(\Lambda \to \pi^- \pi^+) = 63.9\%$ and $B(\eta \to \gamma\gamma) = 39.4\%$.

$\Gamma(\Lambda\Sigma^-\pi^+ + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{227}/\Gamma$

<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 colspan="5"><strong>1.26 ± 0.05</strong> OUR AVERAGE</td></tr><tr><td>1.244 ± 0.002</td><td>0.045</td><td>2.6M</td><td>ABLIKIM</td><td>23bUBES3</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>1.52 ± 0.08</td><td>0.16</td><td>589</td><td>1 ABLIKIM</td><td>07H BES2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>1.11 ± 0.06</td><td>0.20</td><td>342 ± 18</td><td>HENRARD</td><td>87 DM2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>1.38 ± 0.21</td><td>0.35</td><td>118</td><td>EATON</td><td>84 MRK2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ Using $B(\Lambda \to \pi^- \pi^+) = 63.9\%$ and $B(\Sigma^- \to \pi^0 \pi^+) = 51.6\%$.

$\Gamma(\Lambda\Sigma^+\pi^- + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{228}/\Gamma$

<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 colspan="5"><strong>1.21 ± 0.07</strong> OUR AVERAGE</td></tr><tr><td>1.221 ± 0.002</td><td>0.038</td><td>2.7M</td><td>ABLIKIM</td><td>23bUBES3</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>0.90 ± 0.06</td><td>0.16</td><td>225</td><td>HENRARD</td><td>87 DM2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr><tr><td>1.53 ± 0.17</td><td>0.38</td><td>135</td><td>EATON</td><td>84 MRK2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

$\Gamma(\rho K^-\Lambda + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{229}/\Gamma$

<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 colspan="5"><strong>0.86 ± 0.11</strong> OUR AVERAGE</td></tr><tr><td>0.84 ± 0.17</td><td>0.15</td><td>45</td><td>1 LU</td><td>19 BELL B<sup>+</sup> → p\Lambda K<sup>+</sup> K<sup>+</sup></td></tr><tr><td>0.89 ± 0.07</td><td>0.14</td><td>307</td><td>EATON</td><td>84 MRK2</td><td>e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ LU 19 reports $(8.32^{+1.63}_{-1.45} \pm 0.49) \times 10^{-4}$ from a measurement of $[\Gamma(J/\psi(1S) \to pK^-\Lambda + \text{c.c.})/\Gamma_{\text{total}}] \times [B(B^+ \to J/\psi(1S) K^+) \to (1.026 \pm 0.031) \times 10^{-3}]$, which we rescale to our best value $B(B^+ \to J/\psi(1S) K^+) = (1.020 \pm 0.019) \times 10^{-3}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.
$$ \Gamma(pK^-\Sigma^0)/\Gamma_{\text{total}} \qquad \Gamma_{230}/\Gamma $$

<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>0.29±0.06±0.05</td><td>90</td><td>EATON</td><td>84</td><td>MRK2 e<sup>+</sup>e<sup>-</sup></td></tr></tbody></table>

$$ \Gamma(\Lambda n K_S^0 + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{231}/\Gamma $$

<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>6.46±0.20±1.07</td><td>1058</td><td>1 ABLIKIM</td><td>08c</td><td>BES2 e<sup>+</sup>e<sup>-</sup> → J/ψ</td></tr></tbody></table>

¹ Using $B(\Lambda \to p\pi^+) = 63.9\%$ and $B(K_S^0 \to \pi^+\pi^-) = 69.2\%$.

$$ \Gamma(\Lambda\Sigma + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{232}/\Gamma $$

<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 colspan="6"><strong>2.83±0.23 OUR AVERAGE</strong></td></tr><tr><td>2.74±0.24±0.22</td><td>234 ± 21</td><td>1 ABLIKIM</td><td>12b</td><td>BES3 J/ψ → ΛΣ<sup>0</sup></td><td></td></tr><tr><td>2.92±0.22±0.24</td><td>308 ± 24</td><td>2 ABLIKIM</td><td>12b</td><td>BES3 J/ψ → ΛΣ<sup>0</sup></td><td></td></tr></tbody></table>

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

<table><tbody><tr><td>&lt;18</td><td>2 HENRARD</td><td>87</td><td>DM2</td><td>J/ψ → ΛΣ<sup>0</sup></td></tr><tr><td>&lt;15</td><td>PERUZZI</td><td>78</td><td>MRK1</td><td>e<sup>+</sup>e<sup>-</sup> → ΛΧ</td></tr></tbody></table>

¹ ABLIKIM 12b quotes $B(J/ψ → ΛΣ^0)$ which we multiply by 2.

² ABLIKIM 12b and HENRARD 87 quote results for $B(J/ψ → ΛΣ^0)$ which we multiply by 2.

$$ \Gamma(\Sigma^+\Sigma^-)/\Gamma_{\text{total}} \qquad \Gamma_{233}/\Gamma $$

<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><strong>1.07 ± 0.04 OUR AVERAGE</strong></td><td></td><td></td><td></td><td></td></tr><tr><td>1.061 ± 0.004 ± 0.036</td><td>87k</td><td>ABLIKIM</td><td>21AT</td><td>BES3 J/ψ → pπ<sup>0</sup>pπ<sup>0</sup></td></tr><tr><td>1.50 ± 0.10 ± 0.22</td><td>399</td><td>ABLIKIM</td><td>080</td><td>BES2 e<sup>+</sup>e<sup>-</sup> → J/ψ</td></tr></tbody></table>

$$ \Gamma(\Sigma^0\Sigma^0)/\Gamma_{\text{total}} \qquad \Gamma_{234}/\Gamma $$

<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 colspan="5"><strong>1.172±0.032 OUR AVERAGE</strong></td></tr><tr><td colspan="5">Error includes scale factor of 1.4.</td></tr><tr><td>1.164±0.004±0.023</td><td>111k</td><td>ABLIKIM</td><td>17L</td><td>BES3 J/ψ → Σ<sup>0</sup>Σ<sup>0</sup></td></tr><tr><td>1.33 ± 0.04 ± 0.11</td><td>1.7k</td><td>ABLIKIM</td><td>06</td><td>BES2 J/ψ → Σ<sup>0</sup>Σ<sup>0</sup></td></tr><tr><td>1.06 ± 0.04 ± 0.23</td><td>884</td><td>PALLIN</td><td>87</td><td>DM2 e<sup>+</sup>e<sup>-</sup> → Σ<sup>0</sup>Σ<sup>0</sup></td></tr><tr><td>1.58 ± 0.16 ± 0.25</td><td>90</td><td>EATON</td><td>84</td><td>MRK2 e<sup>+</sup>e<sup>-</sup> → Σ<sup>0</sup>Σ<sup>0</sup></td></tr><tr><td>1.3 ± 0.4</td><td>52</td><td>PERUZZI</td><td>78</td><td>MRK1 e<sup>+</sup>e<sup>-</sup> → Σ<sup>0</sup>Σ<sup>0</sup></td></tr></tbody></table>

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

<table><tbody><tr><td>2.4 ± 2.6</td><td>3</td><td>BESCH</td><td>81</td><td>BONA e<sup>+</sup>e<sup>-</sup> → Σ<sup>+</sup>Σ<sup>-</sup></td></tr></tbody></table>

$$ \Gamma(\Sigma^+\Sigma^-\eta)/\Gamma_{\text{total}} \qquad \Gamma_{235}/\Gamma $$

<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>6.34±0.21±0.37</td><td>1821</td><td>ABLIKIM</td><td>22AY</td><td>BES3 J/ψ → Σ<sup>+</sup>Σ<sup>-</sup>η</td></tr></tbody></table>

$$ \Gamma(\Xi^-\Xi^+)/\Gamma_{\text{total}} \qquad \Gamma_{236}/\Gamma $$

<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><strong>0.97 ± 0.08 OUR AVERAGE</strong></td><td></td><td></td><td></td><td></td></tr><tr><td>1.040 ± 0.006 ± 0.074</td><td>43k</td><td>ABLIKIM</td><td>16L</td><td>BES3 J/ψ → Ξ<sup>-</sup>Ξ<sup>+</sup></td></tr><tr><td>0.90 ± 0.03 ± 0.18</td><td>961</td><td>ABLIKIM</td><td>12P</td><td>BES2 J/ψ → Ξ<sup>-</sup>Ξ<sup>+</sup></td></tr><tr><td>0.70 ± 0.06 ± 0.12</td><td>132</td><td>HENRARD</td><td>87</td><td>DM2 e<sup>+</sup>e<sup>-</sup> → Ξ<sup>-</sup>Ξ<sup>+</sup></td></tr><tr><td>1.14 ± 0.08 ± 0.20</td><td>194</td><td>EATON</td><td>84</td><td>MRK2 e<sup>+</sup>e<sup>-</sup> → Ξ<sup>-</sup>Ξ<sup>+</sup></td></tr><tr><td>1.4 ± 0.5</td><td>51</td><td>PERUZZI</td><td>78</td><td>MRK1 e<sup>+</sup>e<sup>-</sup> → Ξ<sup>-</sup>Ξ<sup>+</sup></td></tr></tbody></table>

WEIGHTED AVERAGE
0.97±0.08 (Error scaled by 1.4)

<figure><img src="image_659.png" /></figure>

## RADIATIVE DECAYS

$$ \Gamma(\gamma\eta_c(1S))/\Gamma_{\text{total}} \qquad \Gamma_{237}/\Gamma $$

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

¹.41±0.14 OUR FIT Error includes scale factor of 1.3.

¹.7 ± 0.4 OUR AVERAGE Error includes scale factor of 1.5.

<table><tbody><tr><td>2.00±0.31±0.02</td><td>1 MITCHELL</td><td>09</td><td>CLEO e<sup>+</sup>e<sup>-</sup> → γΧ</td></tr><tr><td>1.27±0.36</td><td>GAISER</td><td>86</td><td>CBAL J/ψ → γΧ</td></tr></tbody></table>

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

<table><tbody><tr><td>3.40±0.33</td><td>2 ANASHIN</td><td>14</td><td>KEDR J/ψ → γη<sub>c</sub></td></tr></tbody></table>

¹ MITCHELL 09 reports $(1.98 \pm 0.09 \pm 0.30) \times 10^{-2}$ from a measurement of $[\Gamma(J/\psi(1S) \to \gamma\eta_c(1S))/\Gamma_{\text{total}}] \times [B(\psi(2S) \to J/\psi(1S)\pi^+\pi^-)]$ assuming $B(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) = (35.04 \pm 0.07 \pm 0.77) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) = (34.69 \pm 0.34) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

² Statistical uncertainty only.

$$ \Gamma(3\gamma)/\Gamma_{\text{total}} \qquad \Gamma_{240}/\Gamma $$

<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 colspan="6"><strong>11.6±2.2 OUR AVERAGE</strong></td></tr><tr><td>11.3±1.8±2.0</td><td>113</td><td>18</td><td>ABLIKIM</td><td>131</td><td>BES3 ψ(2S) → π<sup>+</sup>π<sup>-</sup> J/ψ</td></tr><tr><td>12 ± 3 ± 2</td><td>24.2<sup>+7.2</sup><sub>-6.0</sub></td><td></td><td>ADAMS</td><td>08</td><td>CLEO ψ(2S) → π<sup>+</sup>π<sup>-</sup> J/ψ</td></tr></tbody></table>

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

<table><tbody><tr><td>&lt;55</td><td>90</td><td>PARTRIDGE</td><td>80</td><td>CBAL e<sup>+</sup>e<sup>-</sup></td></tr></tbody></table>

$$ \Gamma(4\gamma)/\Gamma_{\text{total}} \qquad \Gamma_{241}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;9 × 10<sup>-6</sup></td><td>90</td><td>ADAMS</td><td>08</td><td>CLEO ψ(2S) → π<sup>+</sup>π<sup>-</sup> J/ψ</td></tr></tbody></table>

$$ \Gamma(5\gamma)/\Gamma_{\text{total}} \qquad \Gamma_{242}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;15 × 10<sup>-6</sup></td><td>90</td><td>ADAMS</td><td>08</td><td>CLEO ψ(2S) → π<sup>+</sup>π<sup>-</sup> J/ψ</td></tr></tbody></table>

$$ \Gamma(\gamma\pi^0)/\Gamma_{\text{total}} \qquad \Gamma_{243}/\Gamma $$

<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 colspan="5"><strong>3.39±0.08 OUR AVERAGE</strong></td></tr><tr><td>3.34±0.02±0.09</td><td>176k</td><td>ABLIKIM</td><td>23BD</td><td>BES3 J/ψ → π<sup>0</sup>γ</td></tr><tr><td>3.59±0.20±0.04</td><td>1.6k</td><td>1 ABLIKIM</td><td>180</td><td>BES3 ψ(2S) → π<sup>+</sup>π<sup>-</sup>γγγ</td></tr><tr><td>3.63±0.36±0.13</td><td></td><td>PEDLAR</td><td>09</td><td>CLE3 J/ψ → π<sup>0</sup>γ</td></tr><tr><td>3.13<sup>+0.65</sup><sub>-0.47</sub></td><td>586</td><td>ABLIKIM</td><td>06E</td><td>BES2 J/ψ → π<sup>0</sup>γ</td></tr></tbody></table>

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

<table><tbody><tr><td>3.6 ± 1.1 ± 0.7</td><td>83</td><td>CBAL</td><td>e<sup>+</sup>e<sup>-</sup></td></tr></tbody></table>

<table><tbody><tr><td>7.3 ± 4.7</td><td>10</td><td>BRANDELIK</td><td>79c</td><td>DASP e<sup>+</sup>e<sup>-</sup></td></tr></tbody></table>

¹ ABLIKIM 180 reports $[\Gamma(J/\psi(1S) \to \gamma\pi^0)/\Gamma_{\text{total}}] \times [B(\pi^0 \to 2\gamma)] = (3.57 \pm 0.12 \pm 0.16) \times 10^{-5}$ from a measurement of $[\Gamma(J/\psi(1S) \to \gamma\pi^0)/\Gamma_{\text{total}}] \times [B(\pi^0 \to 2\gamma)] \times [B(\psi(2S) \to J/\psi(1S)\pi^+\pi^-)]$ assuming $B(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) = (34.49 \pm 0.30) \times 10^{-2}$, which we rescale to our best values $B(\pi^0 \to 2\gamma) = (98.823 \pm 0.034) \times 10^{-2}$, $B(\psi(2S) \to J/\psi(1S)\pi^+\pi^-) = (34.69 \pm 0.34) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best values.

$$ \Gamma(\gamma\pi^0\pi^0)/\Gamma_{\text{total}} \qquad \Gamma_{244}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.15±0.05</td><td>1 ABLIKIM</td><td>15AE</td><td>BES3 J/ψ → γπ<sup>0</sup>π<sup>0</sup></td></tr></tbody></table>

¹ The uncertainty is systematic as statistical is net negligible.

$$ \Gamma(\gamma2\pi^+2\pi^-)/\Gamma_{\text{total}} \qquad \Gamma_{245}/\Gamma $$

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

².8 ± 0.5 OUR AVERAGE Error includes scale factor of 1.9. See the ideogram below.

<table><tbody><tr><td>4.32±0.14±0.73</td><td>1 BISELLO</td><td>89b</td><td>DM2 J/ψ → 4πγ</td></tr></tbody></table>

<table><tbody><tr><td>2.08±0.13±0.35</td><td>2 BISELLO</td><td>89b</td><td>DM2 J/ψ → 4πγ</td></tr></tbody></table>

<table><tbody><tr><td>3.05±0.08±0.45</td><td>2 BALTRUSAIT...86b</td><td>MRK3 J/ψ → 4πγ</td></tr></tbody></table>

<table><tbody><tr><td>4.85±0.45±1.20</td><td>3 BURKE</td><td>82</td><td>MRK2 e<sup>+</sup>e<sup>-</sup></td></tr></tbody></table>

¹ 4π mass less than 3.0 GeV.

² 4π mass less than 2.0 GeV.

³ 4π mass less than 2.5 GeV.

WEIGHTED AVERAGE
2.8±0.5 (Error scaled by 1.9)

<figure><img src="image_660.png" /></figure>
$$ \Gamma(\gamma f_0(1500) \rightarrow \gamma K_S^0 K_S^0) / \Gamma_{\text{total}} \qquad \Gamma_{292} / \Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.59 ± 0.16 <sup>+0.18</sup><sub>-0.56</sub></td><td>ABLIKIM</td><td>18AA BES3</td><td>J/ψ → γ K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr></tbody></table>

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

<table><tr><td>0.7 ± 0.3</td><td>SARANTSEV</td><td>21</td><td>RVUE</td><td>J/ψ(1S) → γ (ππ, K<sup>−</sup>K, ηη, ωφ)</td></tr></table>

$$ \Gamma(\gamma f_0(1500) \rightarrow \gamma \eta \eta') / \Gamma_{\text{total}} \qquad \Gamma_{293} / \Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td><td></td><td></td><td></td></tr></tbody></table>

<table><tr><td>18.1 ± 1.1 <sup>+1.9</sup><sub>-1.3</sub></td><td>1</td><td>ABLIKIM</td><td>22AS BES3</td><td>J/ψ(1S) → γηη'</td></tr></table>

<table><tr><td>12 ± 5</td><td>SARANTSEV</td><td>21</td><td>RVUE</td><td>J/ψ(1S) → γ(ππ, K<sup>−</sup>K, ηη, ωφ)</td></tr></table>

<table><tr><td>1</td><td>From a Breit-Wigner fit involving 9 resonances and a resonating exotic η<sub>1</sub>(1855) → ηη'</td></tr><tr><td>P-wave.</td><td></td></tr></table>

$$ \Gamma(\gamma f_1(1510) \rightarrow \gamma \eta \pi^+ \pi^-) / \Gamma_{\text{total}} \qquad \Gamma_{294} / \Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.5 ± 1.0 ± 0.7</td><td>BAI</td><td>99</td><td>BES</td><td>J/ψ → γηπ<sup>+</sup> π<sup>-</sup></td></tr></tbody></table>

$$ \Gamma(\gamma f'_2(1525)) / \Gamma_{\text{total}} \qquad \Gamma_{295} / \Gamma $$

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

<table><tr><td>5.7 <sup>+0.8</sup><sub>-0.5</sub></td><td>OUR AVERAGE</td><td>Error includes scale factor of 1.5. See the ideogram below.</td></tr></table>

<table><tbody><tr><td>8.0 ± 0.9 ± 0.2</td><td>750</td><td>1,2 DOBBS</td><td>15</td><td>J/ψ → γK<sup>-</sup>K</td></tr><tr><td>3.85 ± 0.17 <sup>+1.91</sup><sub>-0.73</sub></td><td></td><td>3 BAI</td><td>03G BES</td><td>J/ψ → γK<sup>-</sup>K</td></tr><tr><td>3.6 ± 0.4 <sup>+1.4</sup><sub>-0.4</sub></td><td></td><td>3 BAI</td><td>96C BES</td><td>J/ψ → γK<sup>+</sup> K<sup>-</sup></td></tr><tr><td>5.6 ± 1.4 ± 0.9</td><td></td><td>3 AUGUSTIN</td><td>88 DM2</td><td>J/ψ → γK<sup>+</sup> K<sup>-</sup></td></tr><tr><td>4.5 ± 0.4 ± 0.9</td><td></td><td>3 AUGUSTIN</td><td>88 DM2</td><td>J/ψ → γK<sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr><tr><td>6.8 ± 1.6 ± 1.4</td><td></td><td>3 BALTRUSAIT...87</td><td>MRK3</td><td>J/ψ → γK<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

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

<table><tr><td>&lt;3.4</td><td>90</td><td>4</td><td>4</td><td>BRANDELIK</td><td>79c DASP</td><td>e<sup>+</sup> e<sup>-</sup> → π<sup>+</sup>π<sup>-</sup>γ</td></tr><tr><td>&lt;2.3</td><td>90</td><td>3</td><td>3</td><td>ALEXANDER</td><td>78 PLUT</td><td>e<sup>+</sup> e<sup>-</sup> → K<sup>+</sup> K<sup>-</sup>γ</td></tr></table>

1 Using CLEO-c data but not authored by the CLEO Collaboration.

2 DOBBS 15 reports $[\Gamma(J/\psi(1S) \rightarrow \gamma f'_2(1525)) / \Gamma_{\text{total}}] \times [B(f'_2(1525) \rightarrow K\bar{K})] =$ (7.09 ± 0.46 ± 0.67) × 10⁻⁴ which we divide by our best value $B(f'_2(1525) \rightarrow K\bar{K}) =$ (88.8 ± 2.2) × 10⁻². Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 Using $B(f'_2(1525) \rightarrow K\bar{K}) = 0.888$.

4 Assuming isotropic production and decay of the $f'_2(1525)$ and isospin.

<figure><img src="image_661.png" /><figcaption>WEIGHTED AVERAGE
5.7+0.8-0.5 (Error scaled by 1.5)</figcaption></figure>

$$ \Gamma(\gamma f_2(1565) \rightarrow \gamma \eta \eta') / \Gamma_{\text{total}} \qquad \Gamma_{298} / \Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td><td></td><td></td><td></td></tr></tbody></table>

<table><tr><td>0.32 ± 0.05 <sup>+0.12</sup><sub>-0.02</sub></td><td>1</td><td>ABLIKIM</td><td>22AS BES3</td><td>J/ψ(1S) → γηη'</td></tr></table>

<table><tr><td>1</td><td>From a Breit-Wigner fit involving 9 resonances and a resonating exotic η<sub>1</sub>(1855) → ηη'</td></tr><tr><td>P-wave.</td><td></td></tr></table>

$$ \Gamma(\gamma f'_2(1525) \rightarrow \gamma K_S^0 K_S^0) / \Gamma_{\text{total}} \qquad \Gamma_{296} / \Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>7.99 <sup>+0.03</sup><sub>-0.04</sub> ± 0.69</td><td>ABLIKIM</td><td>18AA BES3</td><td>J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr></tbody></table>

$$ \Gamma(\gamma f'_2(1525) \rightarrow \gamma \eta \eta') / \Gamma_{\text{total}} \qquad \Gamma_{297} / \Gamma $$

<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>3.42 <sup>+0.43</sup><sub>-0.51</sub> ± 1.37</td><td>5.5k</td><td>1 ABLIKIM</td><td>13N BES3</td><td>J/ψ → γηη</td></tr></tbody></table>

1 From partial wave analysis including all possible combinations of 0++, 2++, and 4++ resonances.

$$ \Gamma(\gamma f_2(1640) \rightarrow \gamma \omega \omega) / \Gamma_{\text{total}} \qquad \Gamma_{299} / \Gamma $$

<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>0.28 ± 0.05 ± 0.17</td><td>141</td><td>ABLIKIM</td><td>06H BES</td><td>J/ψ → γωω</td></tr></tbody></table>

$$ \Gamma(\gamma f_0(1710) \rightarrow \gamma \pi \pi) / \Gamma_{\text{total}} \qquad \Gamma_{300} / \Gamma $$

<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 colspan="5"><strong>3.8 ± 0.5 OUR AVERAGE</strong></td></tr><tr><td>3.72 ± 0.30 ± 0.43</td><td>483</td><td>1 DOBBS</td><td>15</td><td>J/ψ → γππ</td></tr><tr><td>3.96 ± 0.06 ± 1.12</td><td></td><td>2 ABLIKIM</td><td>06V BES2</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ → γπ<sup>+</sup> π<sup>-</sup></td></tr><tr><td>3.99 ± 0.15 ± 2.64</td><td></td><td>2 ABLIKIM</td><td>06V BES2</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ → γπ<sub>0</sub>π<sub>0</sub></td></tr></tbody></table>

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

<table><tr><td>0.6 ± 0.2</td><td>3</td><td>SARANTSEV</td><td>21</td><td>RVUE</td><td>J/ψ(1S) → γ (ππ, K<sup>−</sup>K, ηη, ωφ)</td></tr><tr><td>2.5 ± 1.6 ± 0.8</td><td></td><td>BAI</td><td>98H BES</td><td>J/ψ → γπ<sub>0</sub>π<sub>0</sub></td></tr></table>

1 Using CLEO-c data but not authored by the CLEO Collaboration.

2 Including unknown branching fraction to ππ.

3 There is a further (2.4 ± 0.8) × 10⁻⁴ scalar contribution at 1765 MeV.

$$ \Gamma(\gamma f_0(1710) \rightarrow \gamma K\bar{K}) / \Gamma_{\text{total}} \qquad \Gamma_{301} / \Gamma $$

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

<table><tr><td colspan="5"><strong>9.5 ± 1.0 OUR AVERAGE</strong></td></tr><tr><td colspan="5">Error includes scale factor of 1.5. See the ideogram below.</td></tr></table>

<table><tbody><tr><td>8.00<sup>+</sup> <sup>+0.12</sup><sub>-0.08</sub> ± 1.24</td><td>1</td><td>ABLIKIM</td><td>18AA BES3</td><td>J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr><tr><td>11.76 ± 0.54 ± 0.94</td><td>1.2k</td><td>2 DOBBS</td><td>15</td><td>J/ψ → γK<sup>-</sup>K</td></tr><tr><td>9.62 ± 0.029 <sup>+3.51</sup><sub>-1.86</sub></td><td></td><td>3 BAI</td><td>03G BES</td><td>J/ψ → γK<sup>-</sup>K</td></tr><tr><td>5.0 ± 0.8 <sup>+1.8</sup><sub>-0.4</sub></td><td>1,4 BAI</td><td>3 AUGUSTIN</td><td>96C BES</td><td>J/ψ → γK<sup>+</sup> K<sup>-</sup></td></tr><tr><td>9.2 ± 1.4 ± 1.4</td><td></td><td>1 AUGUSTIN</td><td>88 DM2</td><td>J/ψ → γK<sup>+</sup> K<sup>-</sup></td></tr><tr><td>10.4 ± 1.2 ± 1.6</td><td></td><td>1 AUGUSTIN</td><td>88 DM2</td><td>J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr><tr><td>9.6 ± 1.2 ± 1.8</td><td></td><td>1 BALTRUSAIT...87</td><td>MRK3</td><td>J/ψ → γK<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

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

<table><tbody><tr><td>2.3 ± 0.8</td><td>5</td><td>SARANTSEV</td><td>21</td><td>RVUE</td><td>J/ψ(1S) → γ (ππ, K<sup>−</sup>K, ηη, ωφ)</td></tr><tr><td>1.6 ± 0.2 <sup>+0.6</sup><sub>-0.2</sub></td><td>1,6 BAI</td><td>96C BES</td><td></td><td>J/ψ → γK<sup>+</sup> K<sup>-</sup></td></tr><tr><td>&lt; 0.8</td><td>90</td><td>7 BISELLO</td><td>89B</td><td>J/ψ → 4πγ</td></tr><tr><td>1.6 ± 0.4 ± 0.3</td><td></td><td>8 BALTRUSAIT...87</td><td>MRK3</td><td>J/ψ → γπ<sup>+</sup> π<sup>-</sup></td></tr><tr><td>3.8 ± 1.6</td><td></td><td>9 EDWARDS</td><td>82D CBAL</td><td>e<sup>+</sup> e<sup>-</sup> → ηηγ</td></tr></tbody></table>

1 Includes unknown branching fraction to K<sup>+</sup> K<sup>-</sup> or K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup> by 2, and K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup> by 4 to obtain K<sup>-</sup>K<sup>-</sup> result.

2 Using CLEO-c data but not authored by the CLEO Collaboration.

3 Includes unknown branching fraction to K<sup>+</sup> K<sup>-</sup> or K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup>.

4 Assuming $J^P = 2^+$ for $f_0(1710)$.

5 There is a further (6 ± 2) × 10⁻⁴ scalar contribution at 1765 MeV.

6 Assuming $J^P = 0^+$ for $f_0(1710)$.

7 Includes unknown branching fraction to ρ<sup>0</sup>ρ<sup>0</sup>.

8 Includes unknown branching fraction to π<sup>+</sup>π<sup>-</sup>.

9 Includes unknown branching fraction to ηη.

<figure><img src="image_662.png" /><figcaption>WEIGHTED AVERAGE
9.5+1.0-0.5 (Error scaled by 1.5)</figcaption></figure>
# Meson Particle Listings

## J/ψ(1S)

<table><thead><tr><th>Γ(γf<sub>0</sub>(1710) → γωω)/Γ<sub>total</sub></th><th>Γ<sub>302</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th></tr></thead><tbody><tr><td>0.31±0.06±0.08</td><td>180</td></tr></tbody></table>

<table><thead><tr><th>Γ(γf<sub>0</sub>(1710) → γηη)/Γ<sub>total</sub></th><th>Γ<sub>303</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th></tr></thead><tbody><tr><td>2.35<sup>+0.13</sup><sub>-0.11</sub>±1.24</td><td>5.5k</td></tr></tbody></table>

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

$$1.2 \pm 0.4 \qquad 2 \text{ SARANTSEV } 21 \text{ RVUE } J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$$

¹ From partial wave analysis including all possible combinations of 0<sup>++</sup>, 2<sup>++</sup>, and 4<sup>++</sup> resonances.

² There is a further $(0.7 \pm 0.1) \times 10^{-4}$ scalar contribution at 1765 MeV.

<table><thead><tr><th>Γ(γf<sub>0</sub>(1710) → γηη')/Γ<sub>total</sub></th><th>Γ<sub>304</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>6.5 ± 2.5</td><td>1 SARANTSEV</td><td>21</td><td>RVUE $J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$</td></tr></tbody></table>

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

$$6.5 \pm 2.5 \qquad 1 \text{ SARANTSEV } 21 \text{ RVUE } J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$$

¹ There is a further $(2.5 \pm 1.1) \times 10^{-5}$ scalar contribution at 1765 MeV.

<table><thead><tr><th>Γ(γf<sub>0</sub>(1710) → γωφ)/Γ<sub>total</sub></th><th>Γ<sub>305</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>EVTS</th></tr></thead><tbody><tr><td>2.5 ± 0.6</td><td>OUR AVERAGE</td></tr></tbody></table>

<table><tbody><tr><td>2.00 ± 0.08<sup>+1.38</sup><sub>-1.64</sub></td><td>1.3k</td><td>ABLIKIM</td><td>13J</td><td>BES3</td><td>$J/\psi \rightarrow \gamma\omega\phi$</td></tr></tbody></table>

$$2.61 \pm 0.27 \pm 0.65 \qquad 95 \qquad \text{ABLIKIM} \quad \text{06J} \quad \text{BES2} \quad J/\psi \rightarrow \gamma\omega\phi$$

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

$$0.1 \pm 0.1 \qquad 1 \text{ SARANTSEV } 21 \text{ RVUE } J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$$

¹ There is a further $(2.2 \pm 0.4) \times 10^{-4}$ scalar contribution at 1765 MeV.

<table><thead><tr><th>Γ(γf<sub>0</sub>(1770) → γK<sup>0</sup><sub>S</sub>K<sup>0</sup><sub>S</sub>)/Γ<sub>total</sub></th><th>Γ<sub>306</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.11 ± 0.06<sup>+0.19</sup><sub>-0.32</sub></td><td>ABLIKIM</td><td>18AA</td><td>BES3</td><td>$J/\psi \rightarrow \gamma K^0_S K^0_S$</td></tr></tbody></table>

<table><thead><tr><th>Γ(γf<sub>0</sub>(1770) → γηη')/Γ<sub>total</sub></th><th>Γ<sub>309</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.11 ± 0.01<sup>+0.04</sup><sub>-0.03</sub></td><td>1 ABLIKIM</td><td>22AS</td><td>BES3</td><td>$J/\psi(1S) \rightarrow \gamma\eta\eta'$</td></tr></tbody></table>

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

$$0.11 \pm 0.01 \pm 0.04 \pm 0.03 \qquad 1 \text{ ABLIKIM} \quad 22\text{AS BES3} \quad J/\psi(1S) \rightarrow \gamma\eta\eta'$$

¹ From a Breit-Wigner fit involving 9 resonances and a resonating exotic $\eta_1(1855) \rightarrow \eta\eta'$ P-wave.

<table><thead><tr><th>Γ(γf<sub>2</sub>(1810) → γηη)/Γ<sub>total</sub></th><th>Γ<sub>307</sub>/Γ</th></tr><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>5.40<sup>+0.60</sup><sub>-0.67</sub> ± 3.42</td><td>5.5k</td><td>1 ABLIKIM</td><td>13N</td><td>$J/\psi \rightarrow \gamma\eta\eta$</td></tr></tbody></table>

¹ From partial wave analysis including all possible combinations of 0<sup>++</sup>, 2<sup>++</sup>, and 4<sup>++</sup> resonances.

<table><thead><tr><th>Γ(γηη<sub>1</sub>(1855) → γηη')/Γ<sub>total</sub></th><th>Γ<sub>308</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.70 ± 0.41<sup>+0.16</sup><sub>-0.35</sub></td><td>1 ABLIKIM</td><td>22AI</td><td>BES3</td><td>$J/\psi(1S) \rightarrow \gamma\eta\eta'$</td></tr></tbody></table>

¹ From a Breit-Wigner fit involving 9 resonances and the resonating exotic $\eta_1(1855) \rightarrow \eta\eta'$ P-wave. For analysis details see ABLIKIM 22AS.

<table><thead><tr><th>Γ(γf<sub>2</sub>(1910) → γωω)/Γ<sub>total</sub></th><th>Γ<sub>310</sub>/Γ</th></tr><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>0.20 ± 0.04 ± 0.13</td><td>151</td><td>ABLIKIM</td><td>06H</td><td>BES</td><td>$J/\psi \rightarrow \gamma\omega\omega$</td></tr></tbody></table>

<table><thead><tr><th>Γ(γf<sub>2</sub>(1950) → γK<sup>*</sup>(892)K<sup>*</sup>(892))/Γ<sub>total</sub></th><th>Γ<sub>311</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.7 ± 0.1 ± 0.2</td><td>BAI</td><td>00B</td><td>BES</td><td>$J/\psi \rightarrow \gamma K^+ K^0 \pi^+ \pi^-$</td></tr></tbody></table>

<table><thead><tr><th>Γ(γf<sub>2</sub>(2010) → γηη')/Γ<sub>total</sub></th><th>Γ<sub>312</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.71 ± 0.06<sup>+0.19</sup><sub>-0.06</sub></td><td>1 ABLIKIM</td><td>22AS BES3</td><td>$J/\psi(1S) \rightarrow \gamma\eta\eta'$</td></tr></tbody></table>

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

$$0.71 \pm 0.06 \pm 0.19 \pm 0.06 \qquad 1 \text{ ABLIKIM} \quad 22\text{AS BES3} \quad J/\psi(1S) \rightarrow \gamma\eta\eta'$$

¹ From a Breit-Wigner fit involving 9 resonances and a resonating exotic $\eta_1(1855) \rightarrow \eta\eta'$ P-wave.

<table><thead><tr><th>Γ(γf<sub>0</sub>(2020) → γππ)/Γ<sub>total</sub></th><th>Γ<sub>313</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>42 ± 10</td><td>SARANTSEV</td><td>21</td><td>RVUE $J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$</td></tr></tbody></table>

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

<table><thead><tr><th>Γ(γf<sub>0</sub>(2020) → γK<sup>0</sup><sub>S</sub>)/Γ<sub>total</sub></th><th>Γ<sub>314</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>55 ± 25</td><td>SARANTSEV</td><td>21</td><td>RVUE $J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$</td></tr></tbody></table>

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

<table><thead><tr><th>Γ(γf<sub>0</sub>(2020) → γηη)/Γ<sub>total</sub></th><th>Γ<sub>315</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>10 ± 10</td><td>SARANTSEV</td><td>21</td><td>RVUE $J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$</td></tr></tbody></table>

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

<table><thead><tr><th>Γ(γf<sub>0</sub>(2020) → γηη')/Γ<sub>total</sub></th><th>Γ<sub>316</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.63 ± 0.06<sup>+0.31</sup><sub>-0.46</sub></td><td>1 ABLIKIM</td><td>22C</td><td>BES3</td><td>$J/\psi \rightarrow \gamma\eta'\eta' \rightarrow 4/5\gamma(\pi^+\pi^-)$</td></tr></tbody></table>

¹ From a partial wave analysis of the systems $(\gamma X)$, with $X \rightarrow \eta'\eta'$, and $(\eta' X)$, with $X \rightarrow \gamma\eta'$ in the decay $J/\psi \rightarrow \gamma\eta'\eta'$. The intermediate resonance $X$ is parametrized by a constant-width, relativistic Breit-Wigner.

<table><thead><tr><th>Γ(γf<sub>0</sub>(2020) → γηη')/Γ<sub>total</sub></th><th>Γ<sub>317</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.28 ± 0.12<sup>+0.29</sup><sub>-0.20</sub></td><td>1 ABLIKIM</td><td>22AS BES3</td><td>$J/\psi(1S) \rightarrow \gamma\eta\eta'$</td></tr></tbody></table>

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

¹ From a Breit-Wigner fit involving 9 resonances and a resonating exotic $\eta_1(1855) \rightarrow \eta\eta'$ P-wave.

<table><thead><tr><th>Γ(γf<sub>4</sub>(2050))/Γ<sub>total</sub></th><th>Γ<sub>318</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.7 ± 0.5 ± 0.5</td><td>1 BALTRUSAIT...87</td><td>MRK3</td><td>$J/\psi \rightarrow \gamma\pi^+\pi^-$</td></tr></tbody></table>

¹ Assuming branching fraction $f_4(2050) \rightarrow \pi\pi/\text{total} = 0.167$.

<table><thead><tr><th>Γ(γf<sub>4</sub>(2050) → γηη')/Γ<sub>total</sub></th><th>Γ<sub>319</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.06 ± 0.01<sup>+0.03</sup><sub>-0.01</sub></td><td>1 ABLIKIM</td><td>22AS BES3</td><td>$J/\psi(1S) \rightarrow \gamma\eta\eta'$</td></tr></tbody></table>

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

¹ From a Breit-Wigner fit involving 9 resonances and a resonating exotic $\eta_1(1855) \rightarrow \eta\eta'$ P-wave.

<table><thead><tr><th>Γ(γf<sub>0</sub>(2100) → γηη)/Γ<sub>total</sub></th><th>Γ<sub>320</sub>/Γ</th></tr><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>1.13<sup>+0.09</sup><sub>-0.10</sub> ± 0.64</td><td>5.5k</td><td>1 ABLIKIM</td><td>13N</td><td>BES3</td><td>$J/\psi \rightarrow \gamma\eta\eta$</td></tr></tbody></table>

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

¹ From partial wave analysis including all possible combinations of 0<sup>++</sup>, 2<sup>++</sup>, and 4<sup>++</sup> resonances.

<table><thead><tr><th>Γ(γf<sub>0</sub>(2100) → γππ)/Γ<sub>total</sub></th><th>Γ<sub>322</sub>/Γ</th></tr><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>6.24 ± 0.48 ± 0.87</td><td>744</td><td>1 DOBBS</td><td>15</td><td>$J/\psi \rightarrow \gamma\pi\pi$</td></tr></tbody></table>

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

¹ Using CLEO-c data but not authored by the CLEO Collaboration.

<table><thead><tr><th>Γ(γf<sub>0</sub>(2100) → γK<sup>0</sup><sub>S</sub>)/Γ<sub>total</sub></th><th>Γ<sub>321</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>32 ± 20</td><td>SARANTSEV</td><td>21</td><td>RVUE $J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$</td></tr></tbody></table>

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

<table><thead><tr><th>Γ(γf<sub>0</sub>(2200))/Γ<sub>total</sub></th><th>Γ<sub>323</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-4</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.5</td><td>SARANTSEV</td><td>21</td><td>RVUE $J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$</td></tr></tbody></table>

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

<table><thead><tr><th>Γ(γf<sub>0</sub>(2200) → γππ)/Γ<sub>total</sub></th><th>Γ<sub>326</sub>/Γ</th></tr><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>5 ± 2</td><td>SARANTSEV</td><td>21</td><td>RVUE $J/\psi(1S) \rightarrow \gamma(\pi\pi, K\bar{K}, \eta\eta, \omega\phi)$</td></tr></tbody></table>

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

<table><thead><tr><th>Γ(γf<sub>0</sub>(2200) → γK<sup>0</sup><sub>S</sub>)/Γ<sub>total</sub></th><th>Γ<sub>324</sub>/Γ</th></tr><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>5.86 ± 0.49 ± 1.20</td><td>490</td><td>1 DOBBS</td><td>15</td><td>$J/\psi \rightarrow \gamma K\bar{K}$</td></tr></tbody></table>

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

¹ Using CLEO-c data but not authored by the CLEO Collaboration.
$$ \Gamma(\gamma f_0(2220) \rightarrow \gamma K_S^0 K_S^0)/\Gamma_{\text{total}} \qquad \Gamma_{325}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.72<sup>+0.08</sup><sub>-0.06</sub><sup>+0.17</sup><sub>-0.47</sub></td><td>ABLIKIM</td><td>18AA BES3</td><td>J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr></tbody></table>

$$ \Gamma(\gamma f_0(2220) \rightarrow \gamma \eta \eta')/\Gamma_{\text{total}} \qquad \Gamma_{327}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.7 ± 0.4</td><td>SARANTSEV</td><td>21</td><td>RVUE J/ψ(1S) → γ(ππ, K<sup>−</sup>K, ηη, ωφ)</td></tr></tbody></table>

$$ \Gamma(\gamma f_0(2220))/\Gamma_{\text{total}} \qquad \Gamma_{328}/\Gamma $$

<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></tbody></table>

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

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>&gt;300</td><td>1 BAI</td><td>96B</td><td>BES</td><td>e<sup>+</sup>e<sup>-</sup> → γp̄p, K̄K</td><td></td></tr><tr><td>&gt;250</td><td>99.9</td><td>2 HASAN</td><td>96</td><td>SPEC</td><td>p̄p → π<sup>+</sup>π<sup>-</sup></td></tr><tr><td>&lt; 2.3</td><td>95</td><td>3 AUGUSTIN</td><td>88</td><td>DM2</td><td>J/ψ → γK<sup>+</sup>K<sup>-</sup></td></tr><tr><td>&lt; 1.6</td><td>95</td><td>3 AUGUSTIN</td><td>88</td><td>DM2</td><td>J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr><tr><td>12.4<sup>+6.4</sup><sub>-5.2</sub> ± 2.8</td><td>23</td><td>3 BALTRUSAIT..86D</td><td>MRK3</td><td>J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td><td></td></tr><tr><td>8.4<sup>+3.4</sup><sub>-2.8</sub> ± 1.6</td><td>93</td><td>3 BALTRUSAIT..86D</td><td>MRK3</td><td>J/ψ → γK<sup>+</sup>K<sup>-</sup></td><td></td></tr></tbody></table>

¹ Using BARNES 93.

² Using BAI 96b.

³ Includes unknown branching fraction to K<sup>+</sup>K<sup>-</sup> or K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup>.

$$ \Gamma(\gamma f_0(2220) \rightarrow \gamma \pi \pi')/\Gamma_{\text{total}} \qquad \Gamma_{329}/\Gamma $$

<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>&lt; 3.9</td><td>90</td><td>1,2 DOBBS</td><td>15</td><td>J/ψ → γππ</td></tr></tbody></table>

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

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>14 ± 8 ± 4</td><td>BAI</td><td>98H</td><td>BES</td><td>J/ψ → γπ<sup>0</sup>π<sup>0</sup></td><td></td></tr><tr><td>8.4 ± 2.6 ± 3.0</td><td>BAI</td><td>96B</td><td>BES</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ → γπ<sup>+</sup>π<sup>-</sup></td><td></td></tr></tbody></table>

¹ Using CLEO-c data but not authored by the CLEO Collaboration.

² For Γ = 20/50 MeV, the 90% CL upper limits for π<sup>+</sup>π<sup>-</sup> and π<sup>0</sup>π<sup>0</sup> are 2.6/5.2 × 10<sup>-5</sup> and 1.3/1.9 × 10<sup>-5</sup>, respectively.

$$ \Gamma(\gamma f_0(2220) \rightarrow \gamma K\bar{K})/\Gamma_{\text{total}} \qquad \Gamma_{330}/\Gamma $$

<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>&lt; 4.1</td><td>90</td><td>1,2 DOBBS</td><td>15</td><td>J/ψ → γK̄K</td></tr></tbody></table>

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

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>&lt; 3.6</td><td>3 DEL-AMO-SA..100</td><td>BABR</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ → γK<sup>+</sup>K<sup>-</sup></td><td></td><td></td></tr><tr><td>&lt; 2.9</td><td>3 DEL-AMO-SA..100</td><td>BABR</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td><td></td><td></td></tr><tr><td>6.6 ± 2.9 ± 2.4</td><td>BAI</td><td>96B</td><td>BES</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ → γK<sup>+</sup>K<sup>-</sup></td><td></td></tr><tr><td>10.8 ± 4.0 ± 3.2</td><td>BAI</td><td>96B</td><td>BES</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td><td></td></tr></tbody></table>

¹ Using CLEO-c data but not authored by the CLEO Collaboration.

² For Γ = 20/50 MeV, the 90% CL upper limits for K<sup>+</sup>K<sup>-</sup> and K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup> are 1.7/3.1 × 10<sup>-5</sup> and 1.2/2.0 × 10<sup>-5</sup>, respectively.

³ For spin 2 and helicity 0; other combinations lead to more stringent upper limits.

$$ \Gamma(\gamma f_0(2220) \rightarrow \gamma p\bar{p})/\Gamma_{\text{total}} \qquad \Gamma_{331}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.5 ± 0.6 ± 0.5</td><td>BAI</td><td>96B</td><td>BES</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ → γp̄p</td></tr></tbody></table>

$$ \Gamma(\gamma f_0(2330) \rightarrow \gamma K_S^0 K_S^0)/\Gamma_{\text{total}} \qquad \Gamma_{332}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.95 ± 0.21<sup>+0.66</sup><sub>-0.72</sub></td><td>ABLIKIM</td><td>18AA BES3</td><td>J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr></tbody></table>

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

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>0.6 ± 0.1</td><td>SARANTSEV</td><td>21</td><td>RVUE</td><td>J/ψ(1S) → γ(ππ, K̄K, ηη, ωφ)</td><td></td></tr></tbody></table>

$$ \Gamma(\gamma f_0(2330) \rightarrow \gamma \pi \pi')/\Gamma_{\text{total}} \qquad \Gamma_{333}/\Gamma $$

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

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

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>4 ± 2</td><td>SARANTSEV</td><td>21</td><td>RVUE</td><td>J/ψ(1S) → γ(ππ, K̄K, ηη, ωφ)</td><td></td></tr></tbody></table>

$$ \Gamma(\gamma f_0(2330) \rightarrow \gamma \eta \eta')/\Gamma_{\text{total}} \qquad \Gamma_{334}/\Gamma $$

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

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

<table><thead><tr><th></th><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>1.5 ± 0.4</td><td>SARANTSEV</td><td>21</td><td>RVUE</td><td>J/ψ(1S) → γ(ππ, K̄K, ηη, ωφ)</td><td></td></tr></tbody></table>

$$ \Gamma(\gamma f_0(2330) \rightarrow \gamma \eta' \eta')/\Gamma_{\text{total}} \qquad \Gamma_{335}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>6.09 ± 0.64<sup>+4.00</sup><sub>-1.68</sub></td><td>1 ABLIKIM</td><td>22C BES3</td><td>J/ψ → γη'η' → 4/5 γ2(π<sup>+</sup>π<sup>-</sup>)</td></tr></tbody></table>

¹ From a partial wave analysis of the systems (γX), with X → η'η', and (η'X), with X → γη' in the decay J/ψ → γη'η'. The intermediate resonance X is parametrized by a constant-width, relativistic Breit-Wigner.

$$ \Gamma(\gamma f_0(2330) \rightarrow \gamma \eta \eta')/\Gamma_{\text{total}} \qquad \Gamma_{336}/\Gamma $$

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

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

<table><thead><tr><th>0.10 ± 0.02<sup>+0.01</sup><sub>-0.02</sub></th><th>1 ABLIKIM</th><th>22AA BES3</th><th>J/ψ(1S) → γηη'</th></tr></thead></table>

¹ From a Breit-Wigner fit involving 9 resonances and a resonating exotic η₁(1855) → ηη' P-wave.

$$ \Gamma(\gamma f_0(2470) \rightarrow \gamma \eta' \eta')/\Gamma_{\text{total}} \qquad \Gamma_{340}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>8.18 ± 1.77<sup>+3.73</sup><sub>-2.23</sub></td><td>1 ABLIKIM</td><td>22C BES3</td><td>J/ψ → γη'η' → 4/5 γ2(π<sup>+</sup>π<sup>-</sup>)</td></tr></tbody></table>

¹ From a partial wave analysis of the systems (γX), with X → η'η' and (η'X), with X → γη' in the decay J/ψ → γη'η'. The intermediate resonance X is parametrized by a constant-width, relativistic Breit-Wigner.

$$ \Gamma(\gamma f_0(2340) \rightarrow \gamma \eta \eta')/\Gamma_{\text{total}} \qquad \Gamma_{337}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>5.60<sup>+0.62</sup><sub>-0.65</sub><sup>+2.37</sup><sub>-2.07</sub></td><td>5.5k</td><td>1 ABLIKIM</td><td>13N BES3</td><td>J/ψ → γηη</td></tr></tbody></table>

¹ From partial wave analysis including all possible combinations of 0<sup>++</sup>, 2<sup>++</sup>, and 4<sup>++</sup> resonances.

$$ \Gamma(\gamma f_0(2340) \rightarrow \gamma \eta' \eta')/\Gamma_{\text{total}} \qquad \Gamma_{339}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>8.67 ± 0.70<sup>+0.61</sup><sub>-1.67</sub></td><td>1 ABLIKIM</td><td>22C BES3</td><td>J/ψ → γη'η' → 4/5 γ2(π<sup>+</sup>π<sup>-</sup>)</td></tr></tbody></table>

¹ From a partial wave analysis of the systems (γX), with X → η'η' and (η'X), with X → γη' in the decay J/ψ → γη'η'. The intermediate resonance X is parametrized by a constant-width, relativistic Breit-Wigner.

$$ \Gamma(\gamma f_0(2340) \rightarrow \gamma K_S^0 K_S^0)/\Gamma_{\text{total}} \qquad \Gamma_{338}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>5.54<sup>+0.34</sup><sub>-0.40</sub><sup>+3.82</sup><sub>-1.49</sub></td><td>ABLIKIM</td><td>18AA BES3</td><td>J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr></tbody></table>

$$ \Gamma(\gamma X(1835) \rightarrow \gamma \pi^+ \pi^- \eta')/\Gamma_{\text{total}} \qquad \Gamma_{341}/\Gamma $$

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

2.7 <sup>+0.6</sup><sub>-0.8</sub> OUR AVERAGE Error includes scale factor of 1.6.

<table><thead><tr><th>3.93 ± 0.38<sup>+0.31</sup><sub>-0.84</sub></th><th>1 ABLIKIM</th><th>16J BES3</th><th>J/ψ → γπ<sup>+</sup>π<sup>-</sup>η'</th></tr></thead></table>

<table><thead><tr><th>2.2 ± 0.4 ± 0.4</th><th>264</th><th>ABLIKIM</th><th>05R BES2</th><th>J/ψ → γπ<sup>+</sup>π<sup>-</sup>η'</th></tr></thead></table>

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

<table><thead><tr><th>2.87 ± 0.09<sup>+0.49</sup><sub>-0.52</sub></th><th>4265</th><th>2 ABLIKIM</th><th>11C BES3</th><th>J/ψ → γπ<sup>+</sup>π<sup>-</sup>η'</th></tr></thead></table>

¹ From a fit of the measured π<sup>+</sup>π<sup>-</sup>η' lineshape that accounts for the abrupt distortion observed at the p̄p threshold with a Flatté formula in addition to known backgrounds and contributes, as well as an ad hoc Breit-Wigner (M ≈ 1919 MeV; Γ ≈ 51 MeV) that is required for a good fit. Another explanation for the distortion provided by ABLIKIM 16J is that a second resonance near 1870 MeV interferes with the X(1835); fits to this possibility yield product branching fraction values compatible with that shown within the respective systematic uncertainties.

² From a fit of the π<sup>+</sup>π<sup>-</sup>η' mass distribution to a combination of γf<sub>1</sub>(1510), γX(1835), and two states γX(2120) and γX(2370), for M(π<sup>+</sup>π<sup>-</sup>η') < 2.8 GeV, and accounting for backgrounds from non-η' events and J/ψ → π<sup>0</sup>π<sup>+</sup>π<sup>-</sup>η'.

$$ \Gamma(\gamma X(1835) \rightarrow \gamma p\bar{p})/\Gamma_{\text{total}} \qquad \Gamma_{342}/\Gamma $$

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

0.77 <sup>+0.15</sup><sub>-0.09</sub> OUR AVERAGE

<table><thead><tr><th>0.90 ± 0.04<sup>+0.27</sup><sub>-0.11</sub><sup>+0.55</sup><sub>-0.55</sub></th><th>1 ABLIKIM</th><th>12D BES3</th><th>J/ψ → γp̄p</th></tr></thead></table>

<table><thead><tr><th>1.14 ± 0.43<sup>+0.42</sup><sub>-0.30</sub><sup>+0.26</sup><sub>-0.26</sub></th><th>231</th><th>2 ALEXANDER</th><th>10 CLEO</th><th>J/ψ → γp̄p</th></tr></thead></table>

¹ From the fit including final state interaction effects in isospin 0 S-wave according to SIBIRTSEV 05A.

² From a fit of the p̄p mass distribution to a combination of γX(1835), γR with M(R) = 2100 MeV and Γ(R) = 160 MeV, and γp̄p phase space, for M(p̄p) < 2.85 GeV.

$$ \Gamma(\gamma X(1835) \rightarrow \gamma K_S^0 K_S^0 \eta')/\Gamma_{\text{total}} \qquad \Gamma_{343}/\Gamma $$

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.31<sup>+0.33</sup><sub>-0.30</sub><sup>+1.96</sup><sub>-1.29</sub></td><td>ABLIKIM</td><td>15T BES3</td><td>J/ψ → γK<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup>η</td></tr></tbody></table>

$$ \Gamma(\gamma X(1835) \rightarrow \gamma \gamma \phi(1020))/\Gamma_{\text{total}} \qquad \Gamma_{344}/\Gamma $$

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

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

<table><thead><tr><th>1.77 ± 0.35 ± 0.25</th><th>305</th><th>1 ABLIKIM</th><th>18I BES3</th><th>J/ψ → γγφ(1020)</th></tr></thead></table>

<table><thead><tr><th>8.09 ± 1.99 ± 1.36</th><th>1.3k</th><th>2 ABLIKIM</th><th>18I BES3</th><th>J/ψ → γγφ(1020)</th></tr></thead></table>

¹ Constructive interference between the X(1835) and η(1405)/η(1475) is assumed in a fit to the γφ invariant mass.

² destructive interference between the X(1835) and η(1405)/η(1475) is assumed in a fit to the γφ invariant mass.
# Meson Particle Listings

$J/\psi(1S)$

<table><caption>Γ(γX(1835) → γγγ)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>345</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;3.56 × 10<sup>-6</sup></td><td>90</td><td>ABLIKIM</td><td>180</td><td>BES3</td><td>ψ(2S) → π<sup>+</sup>π<sup>-</sup>γγγ</td></tr></tbody></table>

<table><caption>Γ(γX(1835) → γ3(π<sup>+</sup>π<sup>-</sup>))/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>346</sub>/Γ</th></tr></thead><tbody><tr><td>2.44 ± 0.36<sup>+0.60</sup><sub>-0.74</sub></td><td>0.6k</td><td>ABLIKIM</td><td>13U</td><td>BES3</td><td>J/ψ → γ3(π<sup>+</sup>π<sup>-</sup>)</td></tr></tbody></table>

<table><caption>Γ(γX(2370) → γK<sup>+</sup> K<sup>-</sup>η')/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>347</sub>/Γ</th></tr></thead><tbody><tr><td>1.79 ± 0.23 ± 0.65</td><td></td><td>ABLIKIM</td><td>20Q</td><td>BES3</td><td>J/ψ → γK<sup>+</sup> K<sup>-</sup>η'</td></tr></tbody></table>

<table><caption>Γ(γX(2370) → γK<sup>0</sup><sub>S</sub> K<sup>0</sup><sub>S</sub>η')/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>348</sub>/Γ</th></tr></thead><tbody><tr><td>1.18 ± 0.32 ± 0.39</td><td></td><td>ABLIKIM</td><td>20Q</td><td>BES3</td><td>J/ψ → γK<sup>0</sup><sub>S</sub> K<sup>0</sup><sub>S</sub>η'</td></tr></tbody></table>

<table><caption>Γ(γX(2370) → γηηη')/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>349</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;9.2 × 10<sup>-6</sup></td><td>90</td><td>ABLIKIM</td><td>21C</td><td>BES3</td><td>J/ψ(1S) → γηηη'</td></tr></tbody></table>

<table><caption>Γ(γρP)/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>350</sub>/Γ</th></tr></thead><tbody><tr><td>0.38 ± 0.07 ± 0.07</td><td></td><td>49</td><td>EATON</td><td>84</td><td>MRK2 e<sup>+</sup>e<sup>-</sup></td><td></td></tr></tbody></table>

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

<0.11 90 PERUZZI 78 MRK1 e<sup>+</sup>e<sup>-</sup>

<table><caption>Γ(γρPπ<sup>+</sup>π<sup>-</sup>)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>351</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;0.79 × 10<sup>-3</sup></td><td>90</td><td>EATON</td><td>84</td><td>MRK2 e<sup>+</sup>e<sup>-</sup></td><td></td></tr></tbody></table>

<table><caption>Γ(γΛ<span style="text-decoration: overline">A</span>)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>352</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;0.13 × 10<sup>-3</sup></td><td>90</td><td>HENRARD</td><td>87</td><td>DM2 e<sup>+</sup>e<sup>-</sup></td><td></td></tr></tbody></table>

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

<0.16 × 10<sup>-3</sup> 90 BAI 98G BES e<sup>+</sup>e<sup>-</sup>

<table><caption>Γ(γA<sup>0</sup> → γ invisible)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>353</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;1.7 × 10<sup>-6</sup></td><td>90</td><td>88M</td><td>1 ABLIKIM</td><td>20K</td><td>BES3</td><td>ψ(2S) → J/ψπ<sup>+</sup>π<sup>-</sup></td></tr></tbody></table>

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

<6.3 × 10<sup>-6</sup> 90 3.7M 2 INSLER 10 CLEO ψ(2S) → J/ψπ<sup>+</sup>π<sup>-</sup>

¹ For a narrow state, A⁰, with mass m<sub>A⁰</sub> < 1.2 GeV. The limit varies with m<sub>A⁰</sub>, reaching its largest value of 1.7 × 10⁻⁶ at 1.2 GeV and being 7.0 × 10⁻⁷ for m<sub>A⁰</sub> = 0.

² The limit varies with mass m<sub>A⁰</sub> of a narrow state A⁰ and is 4.3 × 10⁻⁶ for m<sub>A⁰</sub> = 0, reaches its largest value of 6.3 × 10⁻⁶ at m<sub>A⁰</sub> = 500 MeV, and is 3.6 × 10⁻⁶ at m<sub>A⁰</sub> = 960 MeV.

<table><caption>Γ(γA<sup>0</sup> → γμ<sup>+</sup> μ<sup>-</sup>)/Γ<sub>total</sub><br>(narrow state A<sup>0</sup> with 0.2 GeV &lt; m<sub>A<sup>0</sup></sub> &lt; 3 GeV)</caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>354</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;7.8 × 10<sup>-7</sup></td><td>90</td><td>1 ABLIKIM</td><td>22H</td><td>BES3</td><td>J/ψ → γμ<sup>+</sup> μ<sup>-</sup></td></tr></tbody></table>

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

<0.5 × 10<sup>-5</sup> 90 2 ABLIKIM 16E BES3 J/ψ → γμ<sup>+</sup> μ<sup>-</sup>

<2.1 × 10<sup>-5</sup> 90 3 ABLIKIM 12 BES3 J/ψ → γμ<sup>+</sup> μ<sup>-</sup>

¹ For a narrow scalar or pseudoscalar, A⁰, with a mass in the range 0.212–3.0 GeV. The measured 90% CL limit as a function of m<sub>A⁰</sub> is in the range (1.2–778.0) × 10⁻⁹.

² For a narrow scalar or pseudoscalar, A⁰, with a mass in the range 0.212–3 GeV. The measured 90% CL limit as a function of m<sub>A⁰</sub> is in the range (2.8–495.3) × 10⁻⁸.

³ For a narrow scalar or pseudoscalar, A⁰, with a mass in the range 0.21–3.00 GeV. The measured 90% CL limit as a function of m<sub>A⁰</sub> ranges from 4 × 10⁻⁷ to 2.1 × 10⁻⁵.

## DALITZ DECAYS

<table><caption>Γ(π<sup>0</sup> e<sup>+</sup> e<sup>-</sup>)/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-7</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>355</sub>/Γ</th></tr></thead><tbody><tr><td>7.56 ± 1.32 ± 0.50</td><td>39</td><td>ABLIKIM</td><td>14I</td><td>BES3</td><td>J/ψ → π<sup>0</sup> e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

<table><caption>Γ(ηe<sup>+</sup> e<sup>-</sup>)/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>356</sub>/Γ</th></tr></thead><tbody><tr><td>1.42 ± 0.04 ± 0.07</td><td>2.47k</td><td>1,2 ABLIKIM</td><td>19A</td><td>BES3</td><td>J/ψ → ηe<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

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

1.16 ± 0.07 ± 0.06 320 1 ABLIKIM 14I BES3 J/ψ → ηe<sup>+</sup> e<sup>-</sup>

¹ Using both η → γγ and η → π<sup>+</sup>π<sup>-</sup>π<sup>0</sup> decays.

² Approximation of the transition form factor squared as an incoherent sum of the ρ-meson and one-pole non-resonant amplitudes gives the pole mass m(Λ) = 2.56 ± 0.04 ± 0.03 GeV. Supersedes ABLIKIM 14I.

<table><caption>Γ(η'(958) e<sup>+</sup> e<sup>-</sup>)/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>357</sub>/Γ</th></tr></thead><tbody><tr><td>6.59 ± 0.07 ± 0.17</td><td>8.9k</td><td>1 ABLIKIM</td><td>19H</td><td>BES3</td><td>J/ψ → η'(958) e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

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

5.81 ± 0.16 ± 0.31 1.4k 1,2 ABLIKIM 14I BES3 J/ψ → η'(958) e<sup>+</sup> e<sup>-</sup>

¹ Using both η' → γπ<sup>+</sup>π<sup>-</sup> and η' → π<sup>+</sup>π<sup>-</sup>η decays.

² Supersedes by ABLIKIM 19H.

<table><caption>Γ(X(1835) e<sup>+</sup> e<sup>-</sup>, X → π<sup>+</sup> π<sup>-</sup>η')/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>358</sub>/Γ</th></tr></thead><tbody><tr><td>3.58 ± 0.19 ± 0.16</td><td>1364</td><td>1 ABLIKIM</td><td>22B</td><td>BES3</td><td>J/ψ → π<sup>+</sup> π<sup>-</sup>η' e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ Assuming constructive interference. Destructive interference gives a value of (4.43 ± 0.23 ± 0.19) × 10⁻⁶ for this branching fraction.

<table><caption>Γ(X(2120) e<sup>+</sup> e<sup>-</sup>, X → π<sup>+</sup> π<sup>-</sup>η')/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>359</sub>/Γ</th></tr></thead><tbody><tr><td>0.82 ± 0.12 ± 0.06</td><td>310</td><td>ABLIKIM</td><td>22B</td><td>BES3</td><td>J/ψ → π<sup>+</sup> π<sup>-</sup>η' e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

<table><caption>Γ(X(2370) e<sup>+</sup> e<sup>-</sup>, X → π<sup>+</sup> π<sup>-</sup>η')/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-6</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>360</sub>/Γ</th></tr></thead><tbody><tr><td>1.08 ± 0.14 ± 0.10</td><td>397</td><td>ABLIKIM</td><td>22B</td><td>BES3</td><td>J/ψ → π<sup>+</sup> π<sup>-</sup>η' e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

<table><caption>Γ(ηU → ηe<sup>+</sup> e<sup>-</sup>)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>361</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;9.11 × 10<sup>-7</sup></td><td>90</td><td>1 ABLIKIM</td><td>19A</td><td>BES3</td><td>J/ψ → ηe<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ For a dark photon U with mass between 10 and 2400 MeV, Obtained 90% C.L. limits as a function of m<sub>U</sub> range from 1.9 × 10⁻⁸ to 91.1 × 10⁻⁸.

<table><caption>Γ(η'(958) U → η'(958) e<sup>+</sup> e<sup>-</sup>)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>362</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;2.0 × 10<sup>-7</sup></td><td>90</td><td>1 ABLIKIM</td><td>19H</td><td>BES3</td><td>J/ψ → η'(958) e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ For a dark photon U with mass between 100 and 2100 MeV. Obtained 90% C.L. limits as a function of m<sub>U</sub> range from 1.8 × 10⁻⁸ to 2.0 × 10⁻⁷. The corresponding limits on the branching fraction J/ψ → η'U range from 5.7 × 10⁻⁸ to 7.4 × 10⁻⁷.

<table><caption>Γ(φe<sup>+</sup> e<sup>-</sup>)/Γ<sub>total</sub></caption><thead><tr><th>VALUE (units 10<sup>-7</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>363</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;1.2</td><td>90</td><td>1 ABLIKIM</td><td>19Ab</td><td>BES3</td><td>J/ψ → φe<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

¹ Using B(φ → K<sup>+</sup> K<sup>-</sup>) = (48.9 ± 0.5)% and B(ψ(2S) → π<sup>+</sup> π<sup>-</sup> J/ψ) = (34.49 ± 0.30)%.

## WEAK DECAYS

<table><caption>Γ(D<sup>-</sup> e<sup>+</sup> ν<sub>e</sub> + c.c.)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>364</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;7.1 × 10<sup>-8</sup></td><td>90</td><td>ABLIKIM</td><td>21Q</td><td>BES3</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

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

<1.2 × 10<sup>-5</sup> 90 ABLIKIM 06M BES2 e<sup>+</sup> e<sup>-</sup> → J/ψ

<table><caption>Γ(D<sup>0</sup> e<sup>+</sup> e<sup>-</sup> + c.c.)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>365</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;8.5 × 10<sup>-8</sup></td><td>90</td><td>1 ABLIKIM</td><td>17Af</td><td>BES3</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

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

<1.1 × 10<sup>-5</sup> 90 ABLIKIM 06M BES2 e<sup>+</sup> e<sup>-</sup> → J/ψ

¹ Using D<sup>0</sup> decays to K<sup>-</sup>π<sup>+</sup>, K<sup>-</sup>π<sup>+</sup>π<sup>0</sup>, and K<sup>-</sup>π<sup>+</sup>π<sup>+</sup>π<sup>-</sup>.

<table><caption>Γ(D<sup>-</sup><sub>S</sub> e<sup>+</sup> ν<sub>e</sub> + c.c.)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>366</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;1.3 × 10<sup>-6</sup></td><td>90</td><td>ABLIKIM</td><td>14R</td><td>BES3</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

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

<3.6 × 10<sup>-5</sup> 90 1 ABLIKIM 06M BES2 e<sup>+</sup> e<sup>-</sup> → J/ψ

¹ Using B(D<sup>-</sup><sub>S</sub> → φπ<sup>-</sup>) = 4.4 ± 0.5 %.

<table><caption>Γ(D<sup>+</sup><sub>S</sub> e<sup>+</sup> ν<sub>e</sub> + c.c.)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>367</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;1.8 × 10<sup>-6</sup></td><td>90</td><td>ABLIKIM</td><td>14R</td><td>BES3</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

<table><caption>Γ(D<sup>-</sup> π<sup>+</sup> + c.c.)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>368</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;7.5 × 10<sup>-5</sup></td><td>90</td><td>ABLIKIM</td><td>08J</td><td>BES2</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

<table><caption>Γ(D<sup>0</sup> K<sup>0</sup> + c.c.)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>369</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;1.7 × 10<sup>-4</sup></td><td>90</td><td>ABLIKIM</td><td>08J</td><td>BES2</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

<table><caption>Γ(D<sup>0</sup> K<sup>0</sup> + c.c.)/Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th><th>Γ<sub>370</sub>/Γ</th></tr></thead><tbody><tr><td>&lt;2.5 × 10<sup>-6</sup></td><td>90</td><td>ABLIKIM</td><td>14K</td><td>BES3</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>
<table><thead><tr><th colspan="2">Γ(D<sub>5</sub><sup>-</sup> π<sup>+</sup> + c.c.)/Γ<sub>total</sub></th><th colspan="4">Γ<sub>371</sub>/Γ</th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;1.3 × 10<sup>-4</sup></td><td>90</td><td>ABLIKIM</td><td>08J</td><td>BES2 e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

<table><thead><tr><th colspan="2">Γ(D<sub>5</sub><sup>-</sup> ρ<sup>+</sup> + c.c.)/Γ<sub>total</sub></th><th colspan="4">Γ<sub>372</sub>/Γ</th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;1.3 × 10<sup>-5</sup></td><td>90</td><td>ABLIKIM</td><td>14K</td><td>BES3 e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

CHARGE CONJUGATION (C), PARITY (P), LEPTON FAMILY NUMBER (LF) VIOLATING MODES

<table><thead><tr><th colspan="2">Γ(γγ)/Γ<sub>total</sub></th><th colspan="4">Γ<sub>373</sub>/Γ</th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;2.7 × 10<sup>-7</sup></td><td>90</td><td>ABLIKIM</td><td>14Q</td><td>BES3 ψ(2S) → π<sup>+</sup>π<sup>-</sup> J/ψ</td></tr></tbody></table>

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

<table><tbody><tr><td>&lt; 0.5 × 10<sup>-5</sup></td><td>90</td><td>ADAMS</td><td>08</td><td>CLEO ψ(2S) → π<sup>+</sup>π<sup>-</sup> J/ψ</td></tr><tr><td>&lt; 1.6 × 10<sup>-4</sup></td><td>90</td><td>1 WICHT</td><td>08</td><td>BELL B<sup>±</sup> → K<sup>±</sup>γγ</td></tr><tr><td>&lt; 2.2 × 10<sup>-5</sup></td><td>90</td><td>ABLIKIM</td><td>07J</td><td>BES2 ψ(2S) → J/ψπ<sup>+</sup>π<sup>-</sup></td></tr><tr><td>&lt;50 × 10<sup>-5</sup></td><td>90</td><td>BARTEL</td><td>77</td><td>CNTR e<sup>+</sup> e<sup>-</sup></td></tr></tbody></table>

1 WICHT 08 reports [Γ(J/ψ(1S) → γγ)/Γ<sub>total</sub>] × [B(B<sup>+</sup> → J/ψ(1S) K<sup>+</sup>)] < 0.16 × 10<sup>-6</sup> which we divide by our best value B(B<sup>+</sup> → J/ψ(1S) K<sup>+</sup>) = 1.020 × 10<sup>-3</sup>.

<table><thead><tr><th colspan="2">Γ(φγ)/Γ<sub>total</sub></th><th colspan="4">Γ<sub>374</sub>/Γ</th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;1.4 × 10<sup>-6</sup></td><td>90</td><td>ABLIKIM</td><td>14Q</td><td>BES3 ψ(2S) → π<sup>+</sup>π<sup>-</sup> J/ψ</td></tr></tbody></table>

<table><thead><tr><th colspan="2">Γ(±μ∓)/Γ<sub>total</sub></th><th colspan="4">Γ<sub>375</sub>/Γ</th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;1.6 × 10<sup>-7</sup></td><td>90</td><td>ABLIKIM</td><td>13L</td><td>BES3 e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

<table><tbody><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>&lt;1.1 × 10<sup>-6</sup></td><td>90</td><td>BAI</td><td>03D</td><td>BES e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

<table><thead><tr><th colspan="2">Γ(±τ<sup>+</sup>)/Γ<sub>total</sub></th><th colspan="4">Γ<sub>376</sub>/Γ</th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;7.5 × 10<sup>-8</sup></td><td>90</td><td>ABLIKIM</td><td>21M</td><td>BES3 e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

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

<table><tbody><tr><td>&lt;8.3 × 10<sup>-6</sup></td><td>90</td><td>1 ABLIKIM</td><td>04</td><td>BES e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr><tr><td colspan="5">¹ Superseded by ABLIKIM 21M.</td></tr></tbody></table>

<table><thead><tr><th colspan="2">Γ(μ<sup>±</sup>τ<sup>+</sup>)/Γ<sub>total</sub></th><th colspan="4">Γ<sub>377</sub>/Γ</th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;2.0 × 10<sup>-6</sup></td><td>90</td><td>ABLIKIM</td><td>04</td><td>BES e<sup>+</sup> e<sup>-</sup> → J/ψ</td></tr></tbody></table>

<table><thead><tr><th colspan="2">Γ(Λ<sub>2</sub><sup>+</sup> e<sup>-</sup> + c.c.)/Γ<sub>total</sub></th><th colspan="4">Γ<sub>378</sub>/Γ</th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;6.9 × 10<sup>-8</sup></td><td>90</td><td>ABLIKIM</td><td>19AF</td><td>BES3 e<sup>+</sup> e<sup>-</sup> → J/ψ pK<sup>-</sup> π<sup>+</sup> e<sup>-</sup> (+ c.c.)</td></tr></tbody></table>

OTHER DECAYS

<table><thead><tr><th colspan="2">Γ(invisible)/Γ(±e<sup>-</sup>)</th><th colspan="4">Γ<sub>379</sub>/Γ<sub>5</sub></th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;6.6 × 10<sup>-2</sup></td><td>90</td><td>LEES</td><td>13I</td><td>BABR B → K<sup>(+)</sup> J/ψ</td></tr></tbody></table>

<table><thead><tr><th colspan="2">Γ(invisible)/Γ(μ<sup>+</sup> μ<sup>-</sup>)</th><th colspan="4">Γ<sub>379</sub>/Γ<sub>7</sub></th></tr><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;1.2 × 10<sup>-2</sup></td><td>90</td><td>ABLIKIM</td><td>08G</td><td>BES2 ψ(2S) → π<sup>+</sup>π<sup>-</sup> J/ψ</td></tr></tbody></table>

J/ψ(1S) REFERENCES

<table><tbody><tr><td>ABLIKIM</td><td>23BD PR D108 092002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>23BU PR D108 110212</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>23S PR D107 072005</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ANASHIN</td><td>23 JHEP 2306 196</td><td>V.V. Anashin et al.</td><td>(KEDR Collab.)</td></tr><tr><td>GONG</td><td>23 PR D107 072008</td><td>G. Gong et al.</td><td>(BELLE Collab.)</td></tr><tr><td>LEES</td><td>23 PR D107 072001</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LIAO</td><td>23 PR D107 112007</td><td>L. Liao et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ZH</td><td>23 PR D107 112006</td><td>W. Zhu et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>22AI PR 129 192002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>Also</td><td>PR D106 072012</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22AS PR D106 072012</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>Also</td><td>PR D107 079901 (errat.)</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22AY PR D106 112007</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22B PR 129 022002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22C PR D105 072002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22H PR D105 012008</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ANASHIN</td><td>22 EPJ C82 938</td><td>V.V. Anashin et al.</td><td>(KEDR Collab.)</td></tr><tr><td>ABLIKIM</td><td>21AM PR D104 920004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>21AT JHEP 2111 226</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>21C PR D103 012009</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>21M PR D103 112007</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td><td></td></tr><tr><td>ABLIKIM</td><td>21Q JHEP 2106 157</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>LEES</td><td>21P PR D103 092001</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LEES</td><td>21B PR D104 112003</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LEES</td><td>21C PR D104 112004</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>SARANTSEV</td><td>21 PL B816 136227</td><td>A.V. Sarantsev et al.</td><td>(BONN, PNPi)</td></tr><tr><td>ABLIKIM</td><td>20 PR D101 012004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>20K PR D101 112005</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>20Q EPJ C80 746</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ANASHIN</td><td>20 JHEP 2007 112</td><td>V.V. Anashin et al.</td><td>(KEDR Collab.)</td></tr></tbody></table>

<table><tbody><tr><td>ABLIKIM</td><td>19A PR D99 012006</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>PR D104 099901 (errat.)</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19AB PR D99 052010</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19AC PR D99 071101</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19AF PR D99 072006</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19AN PR D99 112008</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19AQ PR D100 132004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19H PR D99 012013</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19N PR D99 032006</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19Q PL B791 375</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19T PRL 122 142002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>LU</td><td>19 PR D99 032003</td><td>P.-C. Lu et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>18AA PR D99 072003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>18AB PR D98 072005</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>18D PRL 121 022001</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>18I PR D97 051101</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>18O PR D97 072014</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ANASHIN</td><td>18A PR D95 119 119</td><td>V.V. Anashin et al.</td><td>(KEDR Collab.)</td></tr><tr><td>LEES</td><td>18 PR D97 052007</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LEES</td><td>18E PR D98 112015</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABLIKIM</td><td>17AF PR D96 111101</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17AH PR D96 120011</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17AK PR D96 112012</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17E PR B770 217</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>17L PR D95 052003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>LEES</td><td>17A PR D95 052001</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LEES</td><td>17C PR D95 072007</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LEES</td><td>17D PR D95 092005</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABLIKIM</td><td>16E PR D95 052005</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>16J PR L117 042002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>16K PR D93 052010</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>16L PR D93 072003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>16M PR D93 072008</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>16N PR D93 112011</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>16P PR D94 072005</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>16Q PL B761 98</td><td>M. Ablikim 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>AAJ</td><td>15BI EPJ C75 311</td><td>R. Aalj et al.</td><td>(LHCb Collab.)</td></tr><tr><td>ABLIKIM</td><td>15AE PR D92 052003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>15H PR D91 052017</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>15K PR D91 112001</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>15P PR D92 072007</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>15T PRL 115 091803</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ANASHIN</td><td>15 PR B749 50</td><td>V.V. Anashin et al.</td><td>(KEDR Collab.)</td></tr><tr><td>DOBBS</td><td>15F PR D91 052006</td><td>S. Dobbs et al.</td><td>(NWES Collab.)</td></tr><tr><td>LEES</td><td>15J PR D92 072008</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABLIKIM</td><td>14I PR D89 092008</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>14K PR D89 071101</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>14N PR D90 052009</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>14Q PR D90 092002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>14R PR D90 112014</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ANASHIN</td><td>14 PRL B389 31</td><td>V.V. Anashin et al.</td><td>(KEDR Collab.)</td></tr><tr><td>AULCHENKO</td><td>14 PRL B731 227</td><td>V.M. Aulchenko et al.</td><td>(KEDR Collab.)</td></tr><tr><td>LEES</td><td>14H PR D89 092002</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABLIKIM</td><td>13F PR D87 052007</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13I PR D80 032003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13J PR D87 032008</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13L PR D87 112007</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13N PR D87 092009</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13P PR D87 112004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13R PR D87 032007</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>13U PR D88 091502</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>LEES</td><td>13I PR D87 112005</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LEES</td><td>13O PR D87 092005</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LEES</td><td>13Q PR D88 032013</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LEES</td><td>13Y PR D88 072009</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABLIKIM</td><td>12B PR D86 032012</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12C PR D86 032014</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12D PRL 108 112003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12H PL B710 594</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>12E CP C36 1031</td><td>M. Ablikim et al.</td><td>(BESII Collab.)</td></tr><tr><td>LEES</td><td>12E PR D85 112009</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LEES</td><td>12F PR D86 012008</td><td>J.P. Lees et al.</td><td>(BABAR Collab.)</td></tr><tr><td>METREVELI</td><td>12 PR D85 092007</td><td>Z. Metrevelli et al.</td><td>(NWES, FLOR, WAYN+)</td></tr><tr><td>ABLIKIM</td><td>11 PR D83 012003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11C PR D80 072002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>11D PR D83 032003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>10C PL B685 27</td><td>M. Ablikim et al.</td><td>(BESII Collab.)</td></tr><tr><td>ABLIKIM</td><td>10E PL B693 88</td><td>M. Ablikim et al.</td><td>(BESII Collab.)</td></tr><tr><td>ALEXANDER</td><td>10 PR D82 092002</td><td>J.P. Alexander et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ANASHIN</td><td>10F PR D85 134 134</td><td>P. del Amo Sanchez et al.</td><td>(KEDR Collab.)</td></tr><tr><td>DEL-AMO-SÁ...</td><td>100 PRL 105 172001</td><td>BABAR Collab.</td><td>(BABAR Collab.)</td></tr><tr><td>INSLER</td><td>10 PRL 01 091101</td><td>J. Insler et al.</td><td>(CLEO Collab.)</td></tr><tr><td>ABLIKIM</td><td>09 PL B676 25</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>09B PR D80 052004</td><td>M. Ablikim et al.</td><td>(BES II Collab.)</td></tr><tr><td>MITCHELL</td><td>09 PRL 102 011801</td><td>R.E. Mitchell et al.</td><td>(CLEO Collab.)</td></tr><tr><td>PEDLAR</td><td>09 T.K. Pedlar et al.</td><td>T.K. Pedlar et al.</td><td>(CLEO Collab.)</td></tr><tr><td>SHEN</td><td>09 PRL D80 031101</td><td>C.P. Shen et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>08 EPJ C53 15</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>08A PR D77 012001</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>08C PL B659 789</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>08E PR D77 032005</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>08F PR L100 102002</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>08G PRL 100 192001</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>08I PL B662 330</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>08J PL B663 297</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>08O PR D78 092005</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ADAMS</td><td>08 PR L101 101801</td><td>G.S. Adams et al.</td><td>(CLEO Collab.)</td></tr><tr><td>AUBERT</td><td>08S PR D77 092002</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>BESSON</td><td>08 PR D78 032012</td><td>D. Besson et al.</td><td>(CLEO Collab.)</td></tr><tr><td>PDG</td><td>08 PL B667 1</td><td>C. Amsler et al.</td><td>(PDG 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>ABLIKIM</td><td>09 PR D76 092003</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>07J PR D76 117101</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ANDREOTTI</td><td>07 PL D654 74</td><td>M. Andreotti et al.</td><td>(Femilab E835 Collab.)</td></tr><tr><td>ABERT</td><td>07AK PR D76 012008</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>AUBERT</td><td>07AU PR D76 092005</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>ABERT</td><td>07B PR D76 119902E (errat.)</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>AUBERT</td><td>07BD PR D76 092006</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>06 PL B632 181</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td><td></td></tr><tr><td>ABLIKIM</td><td>06C PL B633 681</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06E PR D73 052008</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06F PR D73 052007</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06J PR L96 162002</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06K PRL 97 062001</td><td>M. Ablikim et al.</td><td>(BES II Collab.)</td></tr><tr><td>ABLIKIM</td><td>06M PRL B639 418</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>06V PL B642 441</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ADAMS</td><td>06A PR D73 051103</td><td>G.S. Adams et al.</td><td>(CLEO Collab.)</td></tr></tbody></table>
<table><thead><tr><th></th><th></th><th></th><th></th><th></th></tr></thead><tbody><tr><td>AUBERT</td><td>06</td><td>PR D73 011101</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>AUBERT</td><td>06B</td><td>PR D73 012005</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>AUBERT</td><td>06D</td><td>PR D73 052003</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>AUBERT,BE</td><td>06D</td><td>PR D74 091103</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>WU</td><td>06</td><td>PRL 97 162003</td><td>C.-H. Wu et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>05</td><td>PL B607 243</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05B</td><td>PR D71 032003</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05C</td><td>PL B610 192</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05H</td><td>PR D72 012002</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>05R</td><td>PRL 95 262001</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>AUBERT</td><td>05D</td><td>PR D71 052001</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>LI</td><td>05C</td><td>PR D71 111103</td><td>Z. Li et al.</td><td>(CLEO Collab.)</td></tr><tr><td>SIBIRSEV</td><td>05A</td><td>PR D71 054010</td><td>A. Sibirtsev, J. Haldenbauer</td><td></td></tr><tr><td>ABLIKIM</td><td>04</td><td>PL B598 172</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>ABLIKIM</td><td>04M</td><td>PR D70 112008</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>AUBERT</td><td>04</td><td>PR D69 011103</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>AUBERT,B</td><td>04N</td><td>PR D70 072004</td><td>B. Aubert et al.</td><td>(BABAR Collab.)</td></tr><tr><td>BAI</td><td>04D</td><td>PR D69 012003</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>04D</td><td>PL B589 7</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>04E</td><td>PL B591 42</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>04G</td><td>PR D70 012004</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>04H</td><td>PR D70 012005</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>04J</td><td>PL B594 47</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>SETH</td><td>04</td><td>PR D69 0997503</td><td>K.K. Seth</td><td></td></tr><tr><td>AULCHENKO</td><td>03</td><td>PL B573 63</td><td>V.M. Aulchenko et al.</td><td>(KEDR Collab.)</td></tr><tr><td>BAI</td><td>03D</td><td>PL B561 49</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>03F</td><td>PRL 91 022001</td><td>J.Z. Bai et al.</td><td>(BES II Collab.)</td></tr><tr><td>BAI</td><td>03G</td><td>PR D68 052003</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>HUANG</td><td>03</td><td>PL B61 241802</td><td>H.-C. Huang et al.</td><td>(BELLE Collab.)</td></tr><tr><td>BAI</td><td>02C</td><td>PRL 88 101802</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>ARTAMONOV</td><td>00</td><td>PL B474 427</td><td>A.S. Artamonov et al.</td><td></td></tr><tr><td>BAI</td><td>00</td><td>PRL 84 594</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>00B</td><td>PL B472 200</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>00D</td><td>PR D476 25</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>99</td><td>PL B446 356</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>99C</td><td>PRL 83 1918</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>98D</td><td>PR D58 092006</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>98G</td><td>PL B424 213</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>98H</td><td>PL B1 1179</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BALDINI</td><td>98</td><td>PL B444 111</td><td>R. Baldini et al.</td><td>(FENICE Collab.)</td></tr><tr><td>ARMSTRONG</td><td>96</td><td>PR D54 7067</td><td>T.A. Armstrong et al.</td><td>(E760 Collab.)</td></tr><tr><td>BAI</td><td>96B</td><td>PRL 76 3502</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>96C</td><td>PRL 77 3959</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BAI</td><td>96D</td><td>PR D54 1221</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>GRIBUSHIN</td><td>96</td><td>PR D53 4723</td><td>A. Gribushin et al.</td><td>(E672 and E760 Collab.)</td></tr><tr><td>HASAN</td><td>96</td><td>PL B388 376</td><td>A. Hasan, D.V. Bugg</td><td>(BRUN, LOQM)</td></tr><tr><td>BAI</td><td>95B</td><td>PRL B355 374</td><td>J.Z. Bai et al.</td><td>(BES Collab.)</td></tr><tr><td>BUGG</td><td>95</td><td>PL B353 378</td><td>D.V. Bugg et al.</td><td>(LOQM, PNPI, WASH)</td></tr><tr><td>ANTONELLI</td><td>93</td><td>PL B301 317</td><td>A. Antonelli et al.</td><td>(FENICE Collab.)</td></tr><tr><td>ARMSTRONG</td><td>93</td><td>PR D347 772</td><td>T.A. Armstrong et al.</td><td>(FINAL E760 Collab.)</td></tr><tr><td>BARNES</td><td>93</td><td>PL B309 469</td><td>P.D. Barnes et al.</td><td>(PS185 Collab.)</td></tr><tr><td>AUGUSTIN</td><td>92</td><td>PR D46 1951</td><td>J.E. Augustin, G. Cosme</td><td>(DM2 Collab.)</td></tr><tr><td>BOLTON</td><td>92</td><td>PL B278 495</td><td>T. Bolton et al.</td><td>(Mark III Collab.)</td></tr><tr><td>BOLTON</td><td>92B</td><td>PRL 69 1328</td><td>T. Bolton et al.</td><td>(Mark III Collab.)</td></tr><tr><td>COFFMAN</td><td>92</td><td>PL 58 282</td><td>D.M. Coffman et al.</td><td>(Mark III Collab.)</td></tr><tr><td>HSEUH</td><td>92</td><td>PR D45 2181</td><td>S. Hseuh, S. Palestini</td><td>(FINAL, TORI)</td></tr><tr><td>AUGUSTIN</td><td>90</td><td>PR D42 10</td><td>J.E. Augustin et al.</td><td>(DM2 Collab.)</td></tr><tr><td>BAI</td><td>90B</td><td>PRL 65 1309</td><td>Z. Bai et al.</td><td>(Mark III Collab.)</td></tr><tr><td>BAI</td><td>90C</td><td>PRL 65 2507</td><td>Z. Bai et al.</td><td>(Mark III Collab.)</td></tr><tr><td>BISELLO</td><td>90</td><td>PL B241 617</td><td>D. Bisello et al.</td><td>(DM2 Collab.)</td></tr><tr><td>COFFMAN</td><td>90</td><td>PR D41 1410</td><td>D.M. Coffman et al.</td><td>(Mark III Collab.)</td></tr><tr><td>JOUSET</td><td>90</td><td>PR D41 1389</td><td>J. Jouset et al.</td><td>(DM2 Collab.)</td></tr><tr><td>ALEXANDER</td><td>89</td><td>NP B320 45</td><td>J.P. Alexander et al.</td><td>(LBL, MICH, SLAC)</td></tr><tr><td>AUGUSTIN</td><td>89</td><td>NP B320 1</td><td>J.E. Augustin, G. Cosme</td><td>(DM2 Collab.)</td></tr><tr><td>BISELLO</td><td>89B</td><td>PR D39 701</td><td>G. Busetto et al.</td><td>(DM2 Collab.)</td></tr><tr><td>AUGUSTIN</td><td>88</td><td>PR D60 2238</td><td>J.E. Augustin et al.</td><td>(DM2 Collab.)</td></tr><tr><td>COFFMAN</td><td>88</td><td>PR D38 2695</td><td>D.M. Coffman et al.</td><td>(Mark III Collab.)</td></tr><tr><td>FALVARD</td><td>88</td><td>PR D38 2706</td><td>A. Falvard et al.</td><td>(CLER, FRAS, LALO+)</td></tr><tr><td>AUGUSTIN</td><td>87</td><td>ZPHY C36 369</td><td>J.E. Augustin et al.</td><td>(LALO, CLER, FRAS+)</td></tr><tr><td>BAGLIN</td><td>87</td><td>NP B286 592</td><td>C. Baglin et al.</td><td>(LAPP, CERN, GENO, LYON+)</td></tr><tr><td>BALTRUSAIT...</td><td>87</td><td>PR D35 2077</td><td>R.M. Baltrusaitis et al.</td><td>(Mark III Collab.)</td></tr><tr><td>BECKER</td><td>87</td><td>NP B30 186</td><td>J.J. Becker et al.</td><td>(Mark III Collab.)</td></tr><tr><td>BISELLO</td><td>87</td><td>PL B192 239</td><td>D. Bisello et al.</td><td>(PAD0, CLER, FRAS+)</td></tr><tr><td>COHEN</td><td>87</td><td>RMP 59 1121</td><td>E.R. Cohen, B.N. Taylor</td><td>(RISC, NBS)</td></tr><tr><td>HENRARD</td><td>87</td><td>NP B292 670</td><td>P. Henrard et al.</td><td>(CLER, FRAS, LALO+)</td></tr><tr><td>PALLIN</td><td>87</td><td>PL B292 653</td><td>D. Pallin et al.</td><td>(CLER, FRAS, LALO, PADO)</td></tr><tr><td>BALTRUSAIT...</td><td>87</td><td>PR D33 1222</td><td>R.M. Baltrusaitis et al.</td><td>(Mark III Collab.)</td></tr><tr><td>BALTRUSAIT...</td><td>86D</td><td>PRL 56 107</td><td>R.M. Baltrusaitis</td><td>(CIT, UCSC, ILL, SLAC+)</td></tr><tr><td>BISELLO</td><td>86B</td><td>PL B179 294</td><td>D. Bisello et al.</td><td>(DM2 Collab.)</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>BALTRUSAIT...</td><td>85C</td><td>PR D55 1723</td><td>R.M. Baltrusaitis et al.</td><td>(CIT, UCSC+)</td></tr><tr><td>BALTRUSAIT...</td><td>85D</td><td>PR D32 566</td><td>R.M. Baltrusaitis et al.</td><td>(CIT, UCSC+)</td></tr><tr><td>KURAEV</td><td>85</td><td>SJPN 41 466</td><td>SJPN 41 466</td><td>(NOVO)</td></tr><tr><td>EATON</td><td>84</td><td>PR D29 804</td><td>M.W. Eaton et al.</td><td>(LBL, SLAC)</td></tr><tr><td>BLOOM</td><td>83</td><td>ARN5 33 143</td><td>E.D. Bloom, C. Peck</td><td>(SLAC, CIT)</td></tr><tr><td>EDWARDS</td><td>83B</td><td>PR L51 859</td><td>C. Edwards et al.</td><td>(CIT, HARV, PRIN+)</td></tr><tr><td>FRANKLIN</td><td>83</td><td>PRL 51 963</td><td>M.E.B. Franklin et al.</td><td>(LBL, SLAC)</td></tr><tr><td>BURKE</td><td>82</td><td>PL 49 632</td><td>D. L. Burke et al.</td><td>(LBL, SLAC)</td></tr><tr><td>EDWARDS</td><td>82B</td><td>PR D25 3065</td><td>C. Edwards et al.</td><td>(CIT, HARV, PRIN+)</td></tr><tr><td>EDWARDS</td><td>82D</td><td>PL R48 458</td><td>C. Edwards et al.</td><td>(CIT, HARV, PRIN+)</td></tr><tr><td>Also</td><td>82</td><td>ARN5 33 143</td><td>E.D. Bloom, C. Peck</td><td>(SLAC, CIT)</td></tr><tr><td>EDWARDS</td><td>82E</td><td>PL 49 259</td><td>C. Edwards et al.</td><td>(CIT, HARV, PRIN+)</td></tr><tr><td>LEMOIGNE</td><td>82E</td><td>PL 113 509</td><td>Y. Lemoigne et al.</td><td>(SACL, LOIC, SHMP+)</td></tr><tr><td>BESCH</td><td>81</td><td>ZPHY C8 1</td><td>H.J. Besch et al.</td><td>(BONN, DESY, MAINZ)</td></tr><tr><td>GIDAL</td><td>81</td><td>PL 107B 153</td><td>G. Gidal et al.</td><td>(SLAC, LBL)</td></tr><tr><td>PARTRIDGE</td><td>80</td><td>PRL 44 712</td><td>R. Partridge et al.</td><td>(CIT, HARV, PRIN+)</td></tr><tr><td>SCHARRE</td><td>80</td><td>PL 50 329</td><td>D.L. Scharre et al.</td><td>(SLAC, LBL)</td></tr><tr><td>ZHOLENTZ</td><td>80</td><td>PL 96B 214</td><td>A.A. Zholents et al.</td><td>(NOVO)</td></tr><tr><td>Also</td><td>80</td><td>PL 96B 214</td><td>A.A. Zholents et al.</td><td>(NOVO)</td></tr><tr><td>Also</td><td>80</td><td>SJPN 34 814</td><td>SJPN 34 814</td><td>(NOVO)</td></tr><tr><td>BRANDELIK</td><td>79C</td><td>PR D29 433</td><td>R. Brandelik et al.</td><td>(DASP Collab.)</td></tr><tr><td>ALEXANDER</td><td>78</td><td>PL 72B 493</td><td>G. Alexander et al.</td><td>(DESY, HAMB, SIEG+)</td></tr><tr><td>BESCH</td><td>78</td><td>PL 78B 347</td><td>H.J. Besch et al.</td><td>(BONN, DESY, MAINZ)</td></tr><tr><td>BRANDELIK</td><td>78B</td><td>PL 74B 292</td><td>R. Brandelik et al.</td><td>(DASP Collab.)</td></tr><tr><td>PERUZZI</td><td>78</td><td>PR D17 2901</td><td>I. Peruzzi et al.</td><td>(LBL, LBL)</td></tr><tr><td>BARTEL</td><td>77</td><td>PL 66B 489</td><td>W. Bartel et al.</td><td>(DESY, HEIDP)</td></tr><tr><td>BURMESTER</td><td>77D</td><td>PL 72B 135</td><td>J. Burmester et al.</td><td>(DESY, HAMB, SIEG+)</td></tr><tr><td>FELDMAN</td><td>77</td><td>PRPL 33C 285</td><td>G.J. Feldman, M.L. Perl</td><td>(LBL, SLAC)</td></tr><tr><td>VANNUCCI</td><td>77</td><td>PR D15 1814</td><td>F. Vannucci et al.</td><td>(SLAC, LBL)</td></tr><tr><td>BARTEL</td><td>76</td><td>PL 64B 483</td><td>W. Bartel et al.</td><td>(DESY, HEIDP)</td></tr><tr><td>BRAUNSCH...</td><td>76</td><td>PL 63B 487</td><td>W. Braunschweig et al.</td><td>(DASP Collab.)</td></tr><tr><td>JEAN-MARIE</td><td>76</td><td>PR L36 291</td><td>B. Jean-Marie et al.</td><td>(SLAC, LBL, IG)</td></tr><tr><td>BALDINI...</td><td>75</td><td>PL 58B 471</td><td>R. Baldini-Cello et al.</td><td>(FRAS, ROMA)</td></tr><tr><td>BOYARSKI</td><td>75</td><td>PRL 34 1357</td><td>A.M. Boyarski et al.</td><td>(SLAC, LBL, JPC)</td></tr><tr><td>DASP</td><td>75</td><td>PL 56B 491</td><td>W. Braunschweig et al.</td><td>(DASP Collab.)</td></tr><tr><td>ESPOSITO</td><td>75B</td><td>LNC 14 73</td><td>B. Esposito et al.</td><td>(FRAS, NAPL, PADO+)</td></tr><tr><td>FORD</td><td>75</td><td>PRL 34 604</td><td>R.L. Ford et al.</td><td>(SLAC, PENN)</td></tr></tbody></table>

## BRANCHING RATIOS OF $\psi(2S)$, $\chi_{c0,1,2}$ AND $\eta_c$

Updated March 2024 by J.J. Hernández-Rey (IFIC, Valencia), R. Mitchell (Indiana U.), S. Navas (U. of Granada), and C. Patrignani (Bologna Univ., INFN)

Since 2002, the treatment of the branching ratios of the $\psi(2S)$ and $\chi_{c0,1,2}$ has undergone an important restructuring. Since the 2023 online edition, the $\eta_c$ (1S) is now treated in a similar way (see the end of this note).

When measuring a branching ratio experimentally, it is not always possible to normalize the number of events observed in the corresponding decay mode to the total number of particles produced. Therefore, the experimenters sometimes report the number of observed decays with respect to another decay mode of the same or another particle in the relevant decay chain. This is actually equivalent to measuring combinations of branching fractions of several decay modes.

To extract the branching ratio of a given decay mode, the collaborations use some previously reported measurements of the required branching ratios. However, the values are frequently taken from the *Review of Particle Physics* (RPP), which in turn uses the branching ratio reported by the experiment in the following edition, giving rise either to correlations or to plain vicious circles, as discussed in more detail in earlier editions of this review [1,2].

The way to avoid these dependencies and correlations is to extract the branching ratios through a fit that uses the truly measured combinations of branching fractions and partial widths. This fit, in fact, should involve decays from the four concerned particles, $\psi(2S)$, $\chi_{c0}$, $\chi_{c1}$, and $\chi_{c2}$, and occasionally some combinations of branching ratios of more than one of them. This is what is done since the 2002 edition [3].

The PDG policy is to quote the results of the collaborations in a manner as close as possible to what appears in their original publications. However, in order to avoid the problems mentioned above, we had in some cases to work out the values originally measured, using the number of events and detection efficiencies given by the collaborations, or rescaling back the published results. The information was sometimes spread over several articles, and some articles referred to papers still unpublished, which in turn contained the relevant numbers in footnotes.

Even though the experimental collaborations are entitled to extract whatever branching ratios they consider appropriate by using other published results, we would like to encourage them to also quote explicitly in their articles the actual quantities measured, so that they can be used directly in averages and fits of different experimental determinations.

To inform the reader how we computed some of the values used in this edition of RPP, we use footnotes to indicate the branching ratios actually given by the experiments and the quantities they use to derive them from the true combination of branching ratios actually measured.

None of the branching ratios of the $\chi_{c0,1,2}$ are measured independently of the $\psi(2S)$ radiative decays. We tried to identify those branching ratios which can be correlated in a non-trivial
way, and although we cannot preclude the existence of other cases, we are confident that the most relevant correlations have already been removed. Nevertheless, correlations in the errors of different quantities measured by the same experiment have not been taken into account.

The $\eta_c(1S)$ can be produced in $\gamma\gamma$ collisions, in the radiative decays of vector and axial-vector charmonia ($J/\psi$, $\psi(2S)$ and $h_c(1P)$) or in B meson decays. As for the $\psi(2S)$ and $\chi_{c0,1,2}$, correlations can be introduced if the derived branching ratios are not properly extracted. We now obtain the corresponding branching ratios using the products of branching ratios originally measured by the experiments, sometimes among different particles (cross-particle branching ratios) and performing an overall fit. In some cases, we were obliged to infer the original product from the information given by the collaborations. However, for recent experiments our policy is not to use anymore extracted branching ratios, so that if the original measured quantity is missing in the relevant publication, the value will not be used in our averages and fits.

## 1. Fit Information for the $\psi(2S)$ and $\chi_{c0,1,2}$

This is an overall fit to 4 total widths, 1 partial width, 25 combinations of partial widths, 10 branching fractions, and 76 branching ratios or combinations thereof. Of the latter, 58 involve decays of more than one particle.

The overall fit uses 253 measurements to determine 49 parameters and gives a $\chi^2$ of 389.6 for 204 degrees of freedom. We have applied scaling factors in the final errors of the fitted values following the procedure described in section 5.2.3 of our Introduction. After rescaling, the total $\chi^2$ is 149.6.

In the listing we provide the inter-particle correlation coefficients $<\delta x_i \delta x_j>$ / $(\delta x_i \cdot \delta x_j)$, in percent, from the fit to the corresponding parameter $x_i$.

## 2. Fit Information for the $\eta_c(1S)$

This is an overall fit to 1 total width, 10 combinations of partial widths, 6 branching fractions and 32 branching ratios or combinations thereof. Of the latter, 31 involve decays of more than one particle.

The overall fit uses 113 measurements to determine 19 parameters and has a $\chi^2$ of 184.6 for 94 degrees of freedom. We have applied scaling factors in the final errors of the fitted values following the procedure described in section 5.2.3 of our Introduction. After rescaling, the total $\chi^2$ is 74.1.

In the listing we provide the inter-particle correlation coefficients $<\delta x_i \delta x_j>$ / $(\delta x_i \cdot \delta x_j)$, in percent, from the fit to the corresponding parameter $x_i$.

## References

1. Y.F. Gu and X.H. Li, Phys. Lett. **B449**, 361 (1999).

2. C. Patrignani, Phys. Rev. **D64**, 034017 (2001).

3. K. Hagiwara et al. (Particle Data Group), Phys. Rev. **D68**, 010001 (2002).

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

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

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

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5"><strong>3414.71 ± 0.30 OUR AVERAGE</strong></td></tr><tr><td>3413.0 ± 1.9 ± 0.6</td><td>933</td><td>1 AAIJ</td><td>17BB LHCB</td><td>p p → b bX → 2(K<sup>+</sup> K<sup>-</sup>)X</td></tr><tr><td>3414.2 ± 0.5 ± 2.3</td><td>5.4k</td><td>UEHARA</td><td>08 BELL</td><td>γγ → χ<sub>c0</sub> → hadrons</td></tr><tr><td>3406 ± 7 ± 6</td><td>230</td><td>2 ABE</td><td>07 BELL</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ(c<span style="text-decoration: overline">c</span>)</td></tr><tr><td>3414.21 ± 0.39 ± 0.27</td><td></td><td>ABLIKIM</td><td>05G BES2</td><td>ψ(2S) → γχ<sub>c0</sub></td></tr><tr><td>3414.7 ± 0.7 ± 0.6</td><td>0.2</td><td>3 ANDREOTTI</td><td>03 E835</td><td>p p → χ<sub>c0</sub> → π<sup>0</sup>π<sup>0</sup></td></tr><tr><td>3415.5 ± 0.4 ± 0.4</td><td>392</td><td>4 BAGNASCO</td><td>02 E835</td><td>p p → χ<sub>c0</sub> → J/ψγ</td></tr><tr><td>3417.4 ± 1.8 ± 0.2</td><td></td><td>3 AMBROGIANI</td><td>99B E835</td><td>p p → e<sup>+</sup>e<sup>-</sup>γ</td></tr><tr><td>3414.1 ± 0.6 ± 0.8</td><td></td><td>BAI</td><td>99B BES</td><td>ψ(2S) → γX</td></tr><tr><td>3417.8 ± 0.4 ± 4</td><td></td><td>3 GAISER</td><td>86 CBAL</td><td>ψ(2S) → γX</td></tr><tr><td>3416 ± 3 ± 4</td><td></td><td>5 TANENBAUM</td><td>78 MRK1</td><td>e<sup>+</sup>e<sup>-</sup></td></tr><tr><td colspan="5">● ● ● We do not use the following data for averages, fits, limits, etc. ● ● ●</td></tr><tr><td>3414.6 ± 1.1</td><td>266</td><td>UEHARA</td><td>13 BELL</td><td>γγ → K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr><tr><td>3416.5 ± 3.0</td><td></td><td>EISENSTEIN</td><td>01 CLE2</td><td>e<sup>+</sup>e<sup>-</sup> → e<sup>+</sup>e<sup>-</sup> → χ<sub>c0</sub></td></tr><tr><td>3422 ± 10</td><td></td><td>5 BARTEL</td><td>78B CNTR</td><td>e<sup>+</sup>e<sup>-</sup> → J/ψ2γ</td></tr><tr><td>3415 ± 9</td><td></td><td>5 BIDDICK</td><td>77 CNTR</td><td>e<sup>+</sup>e<sup>-</sup> → γX</td></tr></tbody></table>

¹ From a fit of the $\phi\phi$ invariant mass with the width of $\chi_{c0}(1P)$ fixed to the PDG 16 value.

² From a fit of the $J/\psi$ recoil mass spectrum. Supersedes ABE, K 02 and ABE 04G.

³ Using mass of $\psi(2S) = 3686.0$ MeV.

⁴ Recalculated by ANDREOTTI 05A, using the value of $\psi(2S)$ mass from AULCHENKO 03.

⁵ Mass value shifted by us by amount appropriate for $\psi(2S)$ mass = 3686 MeV and $J/\psi(1S)$ mass = 3097 MeV.

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

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5"><strong>10.7 ± 0.6 OUR FIT</strong> Error includes scale factor of 1.1.</td></tr><tr><td colspan="5"><strong>10.5 ± 0.8 OUR AVERAGE</strong> Error includes scale factor of 1.1.</td></tr><tr><td>10.6 ± 1.9 ± 2.6</td><td>5.4k</td><td>UEHARA</td><td>08 BELL</td><td>γγ → χ<sub>c0</sub> → hadrons</td></tr><tr><td>12.6 ± 1.5 ± 0.9</td><td></td><td>ABLIKIM</td><td>05G BES2</td><td>ψ(2S) → γχ<sub>c0</sub></td></tr><tr><td>8.6 ± 1.7 ± 0.1</td><td></td><td>ANDREOTTI</td><td>03 E835</td><td>p p → χ<sub>c0</sub> → π<sup>0</sup>π<sup>0</sup></td></tr><tr><td>9.7 ± 1.0</td><td>392</td><td>1 BAGNASCO</td><td>02 E835</td><td>p p → χ<sub>c0</sub> → J/ψγ</td></tr><tr><td>16.6 ± 5.2 ± 0.1</td><td></td><td>AMBROGIANI</td><td>99B E835</td><td>p p → e<sup>+</sup>e<sup>-</sup>γ</td></tr><tr><td>14.3 ± 2.0 ± 3.0</td><td></td><td>BAI</td><td>98I BES</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup></td></tr><tr><td>13.5 ± 3.3 ± 4.2</td><td></td><td>GAISER</td><td>86 CBAL</td><td>ψ(2S) → γX, γπ<sup>0</sup>π<sup>0</sup></td></tr><tr><td colspan="5">● ● ● We do not use the following data for averages, fits, limits, etc. ● ● ●</td></tr><tr><td>13.2 ± 2.1</td><td>266</td><td>UEHARA</td><td>13 BELL</td><td>γγ → K<sub>S</sub><sup>0</sup> K<sub>S</sub><sup>0</sup></td></tr></tbody></table>

¹ Recalculated by ANDREOTTI 05A.

### $\chi_{c0}(1P)$ DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>j</sub>/Γ)</th><th>Scale factor/<br>Confidence level</th></tr></thead><tbody><tr><td colspan="3"><strong>Hadronic decays</strong></td></tr><tr><td>Γ<sub>1</sub> 2(π<sup>+</sup>π<sup>-</sup>)</td><td>(2.3 ± 0.4) %</td><td>S=2.0</td></tr><tr><td>Γ<sub>2</sub> ρ<sup>0</sup>π<sup>+</sup>π<sup>-</sup></td><td>(9.1 ± 3.1) × 10<sup>-3</sup></td><td>S=1.1</td></tr><tr><td>Γ<sub>3</sub> ρ<sup>0</sup>ρ<sup>0</sup></td><td></td><td></td></tr><tr><td>Γ<sub>4</sub> f<sub>0</sub>(980) f<sub>0</sub>(980)</td><td>(6.7 ± 2.1) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>5</sub> π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>π<sup>0</sup></td><td>(3.3 ± 0.4) %</td><td></td></tr><tr><td>Γ<sub>6</sub> ρ<sup>+</sup>π<sup>-</sup>π<sup>0</sup> + c.c.</td><td>(2.9 ± 0.4) %</td><td></td></tr><tr><td>Γ<sub>7</sub> 4π<sup>0</sup></td><td>(3.3 ± 0.4) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>8</sub> π<sup>+</sup>π<sup>-</sup>K<sup>+</sup>K<sup>-</sup></td><td>(1.82 ± 0.16) %</td><td>S=1.2</td></tr><tr><td>Γ<sub>9</sub> K<sub>0</sub><sup>+</sup>(1430)<sup>0</sup> K<sub>0</sub><sup>+</sup>(1430)<sup>0</sup> →<br>π<sup>+</sup>π<sup>-</sup>K<sup>+</sup>K<sup>-</sup></td><td>(9.9 ± 4.0<br>-2.8) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>10</sub> K<sub>0</sub><sup>+</sup>(1430)<sup>0</sup> K<sub>2</sub><sup>+</sup>(1430)<sup>0</sup> + c.c. →<br>π<sup>+</sup>π<sup>-</sup>K<sup>+</sup>K<sup>-</sup></td><td>(8.0 ± 2.0<br>-2.4) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>11</sub> K<sub>1</sub>(1270)<sup>+</sup> K<sup>-</sup> + c.c. →<br>π<sup>+</sup>π<sup>-</sup>K<sup>+</sup>K<sup>-</sup></td><td>(6.3 ± 1.9) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>12</sub> K<sub>1</sub>(1400)<sup>+</sup> K<sup>-</sup> + c.c. →<br>π<sup>+</sup>π<sup>-</sup>K<sup>+</sup>K<sup>-</sup></td><td>&lt; 2.7 × 10<sup>-3</sup></td><td>CL=90%</td></tr><tr><td>Γ<sub>13</sub> f<sub>0</sub>(980) f<sub>0</sub>(980)</td><td>(1.6 ± 1.0<br>-0.9) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>14</sub> f<sub>0</sub>(980) f<sub>0</sub>(2200)</td><td>(7.9 ± 2.0<br>-2.5) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>15</sub> f<sub>0</sub>(1370) f<sub>0</sub>(1370)</td><td>&lt; 2.7 × 10<sup>-4</sup></td><td>CL=90%</td></tr><tr><td>Γ<sub>16</sub> f<sub>0</sub>(1370) f<sub>0</sub>(1500)</td><td>&lt; 1.7 × 10<sup>-4</sup></td><td>CL=90%</td></tr><tr><td>Γ<sub>17</sub> f<sub>0</sub>(1370) f<sub>0</sub>(1710)</td><td>(6.7 ± 3.5<br>-2.3) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>18</sub> f<sub>0</sub>(1500) f<sub>0</sub>(1370)</td><td>&lt; 1.3 × 10<sup>-4</sup></td><td>CL=90%</td></tr><tr><td>Γ<sub>19</sub> f<sub>0</sub>(1500) f<sub>0</sub>(1500)</td><td>&lt; 5 × 10<sup>-5</sup></td><td>CL=90%</td></tr></tbody></table>
$$ \Gamma(\pi\pi) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{32}\Gamma_{98}/\Gamma $$

<table><thead><tr><th>VALUE (eV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>18.7 ± 1.5</td><td>OUR FIT</td><td colspan="3">Error includes scale factor of 1.2.</td></tr></tbody></table>

$$ \Gamma(\pi\pi) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{32}\Gamma_{98}/\Gamma $$

<table><thead><tr><th>VALUE (eV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>29.7 ± 17.4</td><td>±4.8</td><td>103 ± 60</td><td>09 BELL</td><td>10.6 e<sup>+</sup> e<sup>-</sup> → e<sup>+</sup> e<sup>-</sup> π<sup>0</sup> π<sup>0</sup></td></tr><tr><td>22.7 ± 3.2</td><td>±3.5</td><td>129 ± 18</td><td>042 BELL</td><td>10.6 e<sup>+</sup> e<sup>-</sup> →<br>e<sup>+</sup> e<sup>-</sup> π<sup>+</sup> π<sup>-</sup></td></tr></tbody></table>

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 $\pi\pi$.

$$ \Gamma(\eta\eta) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{36}\Gamma_{98}/\Gamma $$

<table><thead><tr><th>VALUE (eV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>9.4 ± 2.3 ± 1.2</td><td>22</td><td>1</td><td>UEHARA</td><td>10A BELL</td></tr></tbody></table>

¹Interference with the continuum not included.

$$ \Gamma(\omega\omega) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{39}\Gamma_{98}/\Gamma $$

<table><thead><tr><th>VALUE (eV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>• • •</td><td></td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc.</td></tr><tr><td>&lt;3.9</td><td>90</td><td>1</td><td>LIU</td><td>12B BELL</td></tr><tr><td></td><td></td><td></td><td></td><td>γγ → 2(π<sup>+</sup> π<sup>-</sup> π<sup>0</sup>)</td></tr><tr><td></td><td></td><td></td><td></td><td>¹Using B(ω → π<sup>+</sup> π<sup>-</sup> π<sup>0</sup>) = (89.2 ± 0.7)%.</td></tr></tbody></table>

$$ \Gamma(\omega\phi) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{40}\Gamma_{98}/\Gamma $$

<table><thead><tr><th>VALUE (eV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>• • •</td><td></td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc.</td></tr><tr><td>&lt;0.34</td><td>90</td><td>1</td><td>LIU</td><td>12B BELL</td></tr><tr><td></td><td></td><td></td><td></td><td>γγ → K<sup>+</sup> K<sup>-</sup> π<sup>+</sup> π<sup>-</sup> π<sup>0</sup></td></tr><tr><td></td><td></td><td></td><td></td><td>¹Using B(φ → K<sup>+</sup> K<sup>-</sup>) = (48.9 ± 0.5)% and B(ω → π<sup>+</sup> π<sup>-</sup> π<sup>0</sup>) = (89.2 ± 0.7)%.</td></tr></tbody></table>

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

<table><thead><tr><th>VALUE (eV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>13.3 ± 1.1</td><td>OUR FIT</td><td colspan="3">Error includes scale factor of 1.1.</td></tr><tr><td>14.3 ± 1.6 ± 2.3</td><td>153 ± 17</td><td>NAKAZAWA</td><td>05 BELL</td><td>10.6 e<sup>+</sup> e<sup>-</sup> →<br>e<sup>+</sup> e<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

$$ \Gamma(K_S^0 K_S^0) \times \Gamma(\gamma\gamma)/\Gamma_{\text{total}} \quad \Gamma_{43}\Gamma_{98}/\Gamma $$

<table><thead><tr><th>VALUE (eV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>7.0 ± 0.6</td><td>OUR FIT</td><td colspan="3">Error includes scale factor of 1.2.</td></tr></tbody></table>

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

<table><thead><tr><th>VALUE (eV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>6.2 ± 1.0</td><td>OUR FIT</td><td colspan="3">Error includes scale factor of 1.5.</td></tr></tbody></table>

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

<table><thead><tr><th>VALUE (eV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.86 ± 0.13</td><td>OUR FIT</td><td colspan="3">Error includes scale factor of 1.1.</td></tr></tbody></table>

## $\chi_c(1P)$ BRANCHING RATIOS

### HADRONIC DECAYS

$$ \Gamma(\rho^0\pi^+\pi^-)/\Gamma(2(\pi^+\pi^-)) \quad \Gamma_{2/1} $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.39 ± 0.12</td><td>OUR FIT</td><td></td><td></td></tr><tr><td>0.39 ± 0.12</td><td></td><td></td><td></td></tr></tbody></table>

$$ \Gamma(f_0(980) f_0(980))/\Gamma_{\text{total}} \quad \Gamma_{4/1} $$

<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>6.7 ± 2.1 ± 0.2</td><td>36 ± 9</td><td>1</td><td>ABLIKIM</td><td>04G BES</td></tr></tbody></table>

¹ABLIKIM 04G reports $[\Gamma(\chi_c(1P) \rightarrow f_0(980) f_0(980))/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_c(1P))] = (6.5 \pm 1.6 \pm 1.3) \times 10^{-5}$ which we divide by our best value $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\pi^+\pi^- \pi^0 \pi^0)/\Gamma_{\text{total}} \quad \Gamma_{5/1} $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.3 ± 0.4 ± 0.1</td><td>1751.4</td><td>1</td><td>HE</td><td>08B CLEO</td></tr></tbody></table>

¹HE 08B reports $3.54 \pm 0.10 \pm 0.43 \pm 0.18 \%$ from a measurement of $[\Gamma(\chi_c(1P) \rightarrow \pi^+\pi^- \pi^0 \pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\rho^+\pi^- \pi^0 + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{6/\Gamma} $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.9 ± 0.4 ± 0.1</td><td>1358.5</td><td>1,2 HE</td><td>08B CLEO</td><td>e<sup>+</sup> e<sup>-</sup> → γh<sup>+</sup> h<sup>-</sup> h<sup>0</sup></td></tr></tbody></table>

¹HE 08B reports $3.04 \pm 0.18 \pm 0.42 \pm 0.16 \%$ from a measurement of $[\Gamma(\chi_c(1P) \rightarrow \rho^+\pi^- \pi^0 + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.62 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. 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.

$$ \Gamma(4\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{7/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3.3 ± 0.4 ± 0.1</td><td>3296</td><td>1 ABLIKIM</td><td>11A BES3</td><td>e<sup>+</sup> e<sup>-</sup> → ψ(2S) → γχ<sub>c</sub>0</td></tr></tbody></table>

¹ABLIKIM 11A reports $(3.34 \pm 0.06 \pm 0.44) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \rightarrow 4\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.62 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^+\bar{K}^*(892)^0 \pi^- + \text{c.c.})/\Gamma(\pi^+\pi^- K^+K^-) \quad \Gamma_{30/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.41 ± 0.09</td><td>OUR FIT</td><td></td><td></td></tr><tr><td>0.41 ± 0.10</td><td></td><td></td><td></td></tr></tbody></table>

$$ \Gamma(K_0^0(1430)^0 K_0^0(1430)^0 \rightarrow \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}} \quad \Gamma_{9/\Gamma} $$

<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>9.9 ± 3.6<sup>+2.8</sup><sub>-0.2</sub></td><td>83</td><td>1</td><td>ABLIKIM</td><td>05Q BES2</td></tr></tbody></table>

¹ABLIKIM 05Q reports $(10.44 \pm 2.37 \pm 3.05 \pm 1.90) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_c(1P) \rightarrow K_0^0(1430)^0 K_0^0(1430)^0 \rightarrow \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K_0^0(1430)^0 K_2^0(1430)^0 + \text{c.c.} \rightarrow \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}} \quad \Gamma_{10/\Gamma} $$

<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>8.0 ± 2.0<sup>+2.4</sup><sub>-0.2</sub></td><td>62</td><td>1</td><td>ABLIKIM</td><td>05Q BES2</td></tr></tbody></table>

¹ABLIKIM 05Q reports $(8.49 \pm 1.66 \pm 1.32 \pm 1.99) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_c(1P) \rightarrow K_0^0(1430)^0 K_2^0(1430)^0 \rightarrow \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K_1(1270)^+ K^- + \text{c.c.} \rightarrow \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}} \quad \Gamma_{11/\Gamma} $$

<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>6.3 ± 1.9 ± 0.1</td><td>68</td><td>1</td><td>ABLIKIM</td><td>05Q BES2</td></tr></tbody></table>

¹ABLIKIM 05Q reports $(6.66 \pm 1.31 \pm 1.60 \pm 1.51) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \rightarrow K_1(1270)^+ K^- + \text{c.c.} \rightarrow \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value. The measurement assumes $B(K_1(1270) \rightarrow K\rho(770)) = 42 \pm 6\%$.

$$ \Gamma(K_1(1400)^+ K^- + \text{c.c.} \rightarrow \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}} \quad \Gamma_{12/\Gamma} $$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;2.7</td><td>90</td><td>1</td><td>ABLIKIM</td><td>05Q BES2</td></tr></tbody></table>

¹ABLIKIM 05Q reports $< 2.85 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \rightarrow K_1(1400)^+ K^- + \text{c.c.} \rightarrow \pi^+\pi^- K^+K^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. The measurement assumes $B(K_1(1400) \rightarrow K^*(892)\pi) = 94 \pm 6\%$.

$$ \Gamma(f_0(980) f_0(980))/\Gamma_{\text{total}} \quad \Gamma_{13/\Gamma} $$

<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>16.3 ± 10.5<sup>+9.0</sup><sub>-0.4</sub></td><td>28</td><td>1</td><td>ABLIKIM</td><td>05Q BES2</td></tr></tbody></table>

¹ABLIKIM 05Q reports $[\Gamma(\chi_c(1P) \rightarrow f_0(980) f_0(980))/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_c(1P))] = (1.59 \pm 0.50 \pm 0.89 \pm 0.72) \times 10^{-5}$ which we divide by our best value $B(\psi(2S) \rightarrow \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value. One of the $f_0(980)$ mesons is identified via decay to $\pi^+\pi^-$ while the other via $K^+K^-$ decay.
$$ \Gamma(f_0(980)f_0(2200))/\Gamma_{\text{total}} \quad \Gamma_{14}/\Gamma $$

<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>7.9<sup>+2.0</sup><sub>-2.5</sub><sup>±0.2</sup></td><td>77</td><td>1 ABLIKIM</td><td>05Q</td><td>BES2</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 05Q reports (8.42±1.42<sup>+1.65</sup><sub>-2.29</sub>)×10<sup>-4</sup> from a measurement of $[\Gamma(\chi_c(1P) → f_0(980)f_0(2200))/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22±0.11±0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = (9.77±0.23)×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. The $f_0$ mesons are identified via $f_0(980) → π^+π^-$ and $f_0(2200) → K^+K^-$ decays.

$$ \Gamma(f_0(1370)f_0(1370))/\Gamma_{\text{total}} \quad \Gamma_{15}/\Gamma $$

<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><strong>&lt;2.7</strong></td><td>90</td><td>1 ABLIKIM</td><td>05Q</td><td>BES2</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 05Q reports < 2.9 × 10<sup>-4</sup> from a measurement of $[\Gamma(\chi_c(1P) → f_0(1370)f_0(1370))/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22±0.11±0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = 9.77×10<sup>-2</sup>. One of the $f_0(1370)$ mesons is identified via decay to π<sup>+</sup>π<sup>-</sup> while the other via K<sup>+</sup>π<sup>-</sup> decay. Both branching fractions for these $f_0$ decays are implicitly included in the quoted result.

$$ \Gamma(f_0(1370)f_0(1500))/\Gamma_{\text{total}} \quad \Gamma_{16}/\Gamma $$

<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><strong>&lt;1.7</strong></td><td>90</td><td>1 ABLIKIM</td><td>05Q</td><td>BES2</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 05Q reports < 1.8 × 10<sup>-4</sup> from a measurement of $[\Gamma(\chi_c(1P) → f_0(1370)f_0(1500))/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22±0.11±0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = 9.77×10<sup>-2</sup>. The $f_0$ mesons are identified via $f_0(1370) → π^+π^-$ and $f_0(1500) → K^+K^-$ decays. Both branching fractions for these $f_0$ decays are implicitly included in the quoted result.

$$ \Gamma(f_0(1370)f_0(1710))/\Gamma_{\text{total}} \quad \Gamma_{17}/\Gamma $$

<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><strong>6.7<sup>+3.5</sup><sub>-2.3</sub><sup>±0.2</sup></strong></td><td>61</td><td>1 ABLIKIM</td><td>05Q</td><td>BES2</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 05Q reports (7.12±1.85<sup>+3.28</sup><sub>-1.68</sub>)×10<sup>-4</sup> from a measurement of $[\Gamma(\chi_c(1P) → f_0(1370)f_0(1710))/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22±0.11±0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = (9.77±0.23)×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. The $f_0$ mesons are identified via $f_0(1370) → π^+π^-$ and $f_0(1710) → K^+K^-$ decays. Both branching fractions for these $f_0$ decays are implicitly included in the quoted result.

$$ \Gamma(f_0(1500)f_0(1370))/\Gamma_{\text{total}} \quad \Gamma_{18}/\Gamma $$

<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><strong>&lt;1.3</strong></td><td>90</td><td>1 ABLIKIM</td><td>05Q</td><td>BES2</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 05Q reports < 1.4 × 10<sup>-4</sup> from a measurement of $[\Gamma(\chi_c(1P) → f_0(1500)f_0(1370))/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22±0.11±0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = 9.77×10<sup>-2</sup>. The $f_0$ mesons are identified via $f_0(1500) → π^+π^-$ and $f_0(1370) → K^+K^-$ decays. Both branching fractions for these $f_0$ decays are implicitly included in the quoted result.

$$ \Gamma(f_0(1500)f_0(1500))/\Gamma_{\text{total}} \quad \Gamma_{19}/\Gamma $$

<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><strong>&lt;0.5</strong></td><td>90</td><td>1 ABLIKIM</td><td>05Q</td><td>BES2</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 05Q reports < 0.55 × 10<sup>-4</sup> from a measurement of $[\Gamma(\chi_c(1P) → f_0(1500)f_0(1500))/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22±0.11±0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = 9.77×10<sup>-2</sup>. One of the $f_0(1500)$ is identified via decay to π<sup>+</sup>π<sup>-</sup> while the other via K<sup>+</sup>π<sup>-</sup> decay. Both branching fractions for these $f_0$ decays are implicitly included in the quoted result.

$$ \Gamma(f_0(1500)f_0(1710))/\Gamma_{\text{total}} \quad \Gamma_{20}/\Gamma $$

<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><strong>&lt;0.7</strong></td><td>90</td><td>1 ABLIKIM</td><td>05Q</td><td>BES2</td><td>ψ(2S) → γπ<sup>+</sup>π<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

1 ABLIKIM 05Q reports < 0.73 × 10<sup>-4</sup> from a measurement of $[\Gamma(\chi_c(1P) → f_0(1500)f_0(1710))/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22±0.11±0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = 9.77×10<sup>-2</sup>. The $f_0$ mesons are identified via $f_0(1500) → π^+π^-$ and $f_0(1710) → K^+K^-$ decays. Both branching fractions for these $f_0$ decays are implicitly included in the quoted result.

$$ \Gamma(K^+ K^- \pi^+ \pi^- \pi^0)/\Gamma_{\text{total}} \quad \Gamma_{21}/\Gamma $$

<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><strong>8.61<sup>+0.13</sup><sub>-0.94</sub></strong></td><td>9.0k</td><td>1 ABLIKIM</td><td>13B</td><td>BES3</td><td>e<sup>+</sup> e<sup>-</sup> → ψ(2S) → γχ<sub>c</sub>0</td></tr></tbody></table>

1 Using 1.06 × 10<sup>8</sup> ψ(2S) mesons and B(ψ(2S) → χ<sub>c0</sub>γ) = (9.68 ± 0.31)%.

$$ \Gamma(K_0^S K^\pm \pi^+ \pi^-)/\Gamma_{\text{total}} \quad \Gamma_{22}/\Gamma $$

<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><strong>4.22<sup>+0.10</sup><sub>-0.43</sub></strong></td><td>2.7k</td><td>1 ABLIKIM</td><td>13B</td><td>BES3</td><td>e<sup>+</sup> e<sup>-</sup> → ψ(2S) → γχ<sub>c0</sub></td></tr></tbody></table>

1 Using 1.06 × 10<sup>8</sup> ψ(2S) mesons and B(ψ(2S) → χ<sub>c0</sub>γ) = (9.68 ± 0.31)%.

$$ \Gamma(K^+ K^- \pi^0 K^0)/\Gamma_{\text{total}} \quad \Gamma_{23}/\Gamma $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.56<sup>+0.09</sup><sub>-0.01</sub></strong></td><td>213.5</td><td>1 HE</td><td>08B</td><td>CLEO</td><td>e<sup>+</sup> e<sup>-</sup> → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup>h<sup>0</sup></td></tr></tbody></table>

1 HE 08b reports 0.59 ± 0.05 ± 0.08 ± 0.03 % from a measurement of $[\Gamma(\chi_c(1P) → K^+K^-\pi^0\pi^0)/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22 ± 0.11 ± 0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = (9.77 ± 0.23) × 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.

$$ \Gamma(K^+ \pi^- \bar{K}^0 \pi^0 + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{24}/\Gamma $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>2.49<sup>+0.33</sup><sub>-0.06</sub></strong></td><td>401.7</td><td>1 HE</td><td>08B</td><td>CLEO</td><td>e<sup>+</sup> e<sup>-</sup> → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup>h<sup>0</sup></td></tr></tbody></table>

1 HE 08b reports 2.64 ± 0.15 ± 0.31 ± 0.14 % from a measurement of $[\Gamma(\chi_c(1P) → K^+\pi^-\bar{K}^0\pi^0 + \text{c.c.})/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22±0.11±0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = (9.77 ± 0.23) × 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.

$$ \Gamma(\rho^+ K^- K^0 + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{25}/\Gamma $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>1.21<sup>+0.21</sup><sub>-0.03</sub></strong></td><td>179.7</td><td>1 HE</td><td>08B</td><td>CLEO</td><td>e<sup>+</sup> e<sup>-</sup> → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup>h<sup>0</sup></td></tr></tbody></table>

1 HE 08b reports 1.28 ± 0.16 ± 0.15 ± 0.07 % from a measurement of $[\Gamma(\chi_c(1P) → \rho^+K^-K^0 + \text{c.c.})/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22±0.11±0.46)×10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = (9.77 ± 0.23) × 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.

$$ \Gamma(K^*(892)^- K^+ \pi^0 → K^+ \pi^- \bar{K}^0 \pi^0 + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{26}/\Gamma $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.46<sup>+0.12</sup><sub>-0.01</sub></strong></td><td>64.1</td><td>1 HE</td><td>08B</td><td>CLEO</td><td>e<sup>+</sup> e<sup>-</sup> → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup>h<sup>0</sup></td></tr></tbody></table>

1 HE 08b reports 0.49 ± 0.10 ± 0.07 ± 0.03 % from a measurement of $[\Gamma(\chi_c(1P) → K^*(892)^- K^+\pi^0 → K^+\pi^-\bar{K}^0\pi^0 + \text{c.c.})/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))] = (9.22 ± 0.11 ± 0.46) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = (9.77 ± 0.23) × 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.

$$ \Gamma(K_0^S K_0^S K^+ \pi^-)/\Gamma_{\text{total}} \quad \Gamma_{27}/\Gamma $$

<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><strong>5.7<sup>+1.11</sup><sub>-0.1</sub></strong></td><td>152 ± 14</td><td>1 ABLIKIM</td><td>05Q BES2</td><td>ψ(2S) → γχ<sub>c</sub>0</td></tr></tbody></table>

1 ABLIKIM 05Q reports $[\Gamma(\chi_c(1P) → K_0^S K_0^S \pi^0 \pi^+)]/\Gamma_{\text{total}}$ × $[B(ψ(2S) → γχ_c(1P))] = (0.558 ± 0.051 ± 0.089) × 10<sup>-3</sup>$ which we divide by our best value B(ψ(2S) → γχ_c(1P)) = (9.77 ± 0.23) × 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(K^+ K^- \eta\pi^0)/\Gamma_{\text{total}} \quad \Gamma_{28}/\Gamma $$

<table><thead><tr><th>VALUE (%)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.30<sup>+0.07</sup><sub>-0.01</sub></strong></td><td>56.4</td><td>1 HE</td><td>08B</td><td>CLEO</td><td>e<sup>+</sup> e<sup>-</sup> → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup>h<sup>0</sup></td></tr></tbody></table>

1 HE 08b reports 0.32 ± 0.05 ± 0.05 ± 0.02 % from a measurement of $[\Gamma(\chi_c(1P) → K^+K^-\eta\pi^0)/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.22 ± 0.11 ± 0.46) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = (9.77 ± 0.23) × 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.

$$ \Gamma(3(\pi^+ \pi^-))/\Gamma_{\text{total}} \quad \Gamma_{29}/\Gamma $$

<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></table>

19.5±2.2 OUR AVERAGE Error includes scale factor of 3.3. See the ideogram below.

<table><tbody><tr><td>20.8±0.5±0.5</td><td>145K</td><td>1 ABLIKIM</td><td>22Q</td><td>BES3</td><td>ψ(2S) → γ3(π<sup>+</sup>π<sup>-</sup>)</td></tr></tbody></table>

<table><tbody><tr><td>11.7±1.0±1.9</td><td>2 BA1</td><td>99B</td><td>BES</td><td>ψ(2S) → γχ<sub>c</sub>0</td></tr></tbody></table>

<table><tbody><tr><td>12.5±2.9±0.5</td><td>2 TANENBAUM</td><td>78</td><td>MRK1</td><td>ψ(2S) → γχ<sub>c</sub>0</td></tr></tbody></table>

1 ABLIKIM 22Q reports (2.080 ± 0.006 ± 0.068) × 10<sup>-2</sup> from a measurement of $[\Gamma(\chi_c(1P) → 3(\pi^+\pi^-))/\Gamma_{\text{total}}] × [B(ψ(2S) → γχ_c(1P))]$ assuming B(ψ(2S) → γχ_c(1P)) = (9.79 ± 0.2) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ_c(1P)) = (9.77 ± 0.23) × 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.
WEIGHTED AVERAGE
19.5±2.2 (Error scaled by 3.3)

<figure><img src="image_663.png" /></figure>

$\Gamma(K^*(892)^0 \bar{K}^*(892)^0)/\Gamma_{\text{total}} \quad \Gamma_{31}/\Gamma$

<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>1.72<sup>+0.60</sup><sub>-0.54</sub> ±0.04</td><td>64</td><td>1 ABLIKIM</td><td>05Q</td><td>BES2 ψ(2S) → γπ<sup>+</sup>π<sup>-</sup> K<sup>+</sup> K<sup>-</sup></td></tr></tbody></table>

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

1.57±0.40±0.04 30 ± 6 2,3 ABLIKIM 04H BES Repl. by ABLIKIM 05Q

1 ABLIKIM 05Q reports $[\Gamma(\chi_c(1P) \to K^*(892)^0 \bar{K}^*(892)^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))] = (0.168 \pm 0.035)_{-0.040}^{+0.047}) \times 10^{-3}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 Assumes $B(K^*(892)^0 \to K^-\pi^+) = 2/3$.

3 ABLIKIM 04H reports $[\Gamma(\chi_c(1P) \to K^*(892)^0 \bar{K}^*(892)^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))] = (1.53 \pm 0.29 \pm 0.26) \times 10^{-4}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$\Gamma(\pi^0 \eta_c)/\Gamma_{\text{total}} \quad \Gamma_{35}/\Gamma$

<table><thead><tr><th>VALUE</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>&lt;1.6 × 10<sup>-3</sup></b></td><td>90</td><td>1 ABLIKIM</td><td>15N BES3</td><td>ψ(2S)e<sup>+</sup> e<sup>-</sup> → γπ<sup>0</sup>η<sub>c</sub></td></tr></tbody></table>

1 Using $B(\eta_c \to K^0 S K^\pm \pi^\mp) \times B(K^0 S \to \pi^+ \pi^-) \times B(\pi^0 \to \gamma\gamma) = (1.66 \pm 0.11) \times 10^{-2}$.

$\Gamma(\eta\eta')/\Gamma_{\text{total}} \quad \Gamma_{37}/\Gamma$

<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>9.1±1.1±0.2</td><td>85</td><td>1 ABLIKIM</td><td>17AI BES3</td><td>ψ(2S) → γη'η</td><td></td></tr></tbody></table>

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

<table><tbody><tr><td>&lt;24</td><td>90</td><td>35 ± 13</td><td>2 ASNER</td><td>09 CLEO</td><td>ψ(2S) → γη'η</td></tr><tr><td>&lt;50</td><td>90</td><td></td><td>3 ADAMS</td><td>07 CLEO</td><td>ψ(2S) → γχ<sub>c</sub>0</td></tr></tbody></table>

1 ABLIKIM 17AI reports $(8.92 \pm 0.84 \pm 0.65) \times 10^{-5}$ from a measurement of $[\Gamma(\chi_c(1P) \to \eta\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.99 \pm 0.27) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ASNER 09 reports $< 0.25 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \eta\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = 9.77 \times 10^{-2}$.

3 Superseded by ASNER 09. ADAMS 07 reports $< 0.5 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \eta\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = 9.77 \times 10^{-2}$.

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

<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><b>2.17±0.12</b> OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>2.24±0.13±0.05</td><td>2.5k</td><td>1 ABLIKIM</td><td>17AI BES3</td><td>ψ(2S) → γη'η'</td></tr><tr><td>2.00±0.21±0.05</td><td>0.4k</td><td>2 ASNER</td><td>09 CLEO</td><td>ψ(2S) → γη'η'</td></tr></tbody></table>

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

1.60±0.41±0.04 23 3 ADAMS 07 CLEO ψ(2S) → γχ_c0

1 ABLIKIM 17AI reports $(2.19 \pm 0.03 \pm 0.14) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \eta'\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.99 \pm 0.27) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ASNER 09 reports $(2.12 \pm 0.13 \pm 0.21) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \eta'\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 Superseded by ASNER 09. ADAMS 07 reports $(1.7 \pm 0.4 \pm 0.2) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \eta'\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (0.922 \pm 0.0011 \pm 0.0046$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$\Gamma(\omega)/\Gamma_{\text{total}} \quad \Gamma_{39}/\Gamma$

<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><b>0.97±0.11</b> OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>0.94±0.11±0.02</td><td>991</td><td>1 ABLIKIM</td><td>11K BES3</td><td>ψ(2S) → γ hadrons</td></tr><tr><td>2.2 ± 0.7 ± 0.1</td><td>38.1 ± 9.6</td><td>2 ABLIKIM</td><td>05N BES2</td><td>ψ(2S) → γχ<sub>c0</sub> → γ6π</td></tr></tbody></table>

1 ABLIKIM 11K reports $(0.95 \pm 0.03 \pm 0.11) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \omega\omega)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.62 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

2 ABLIKIM 05N reports $[\Gamma(\chi_c(1P) \to \omega\omega)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))] = (0.212 \pm 0.053 \pm 0.037) \times 10^{-3}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$\Gamma(\omega)/\Gamma_{\text{total}} \quad \Gamma_{40}/\Gamma$

<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>1.42±0.13±0.03</td><td>486</td><td>1 ABLIKIM</td><td>19J BES3</td><td>ψ(2S) → γ hadrons</td></tr></tbody></table>

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

1.18±0.22±0.03 76 2,3 ABLIKIM 11K BES3 ψ(2S) → γ hadrons

1 ABLIKIM 19J reports $[\Gamma(\chi_c(1P) \to \omega\phi)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))] = (13.83 \pm 0.70 \pm 1.01) \times 10^{-6}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. 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 $(1.2 \pm 0.1 \pm 0.2) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_c(1P) \to \omega\phi)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.62 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 Superseded by ABLIKIM 19J.

$\Gamma(\omega K^+ K^-)/\Gamma_{\text{total}} \quad \Gamma_{41}/\Gamma$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1.94±0.06±0.20</td><td>1.4k</td><td>1 ABLIKIM</td><td>13B BES3</td><td>e<sup>+</sup> e<sup>-</sup> → ψ(2S) → γχ<sub>c0</sub></td></tr></tbody></table>

1 Using $1.06 \times 10^8$ $\psi(2S)$ mesons and $B(\psi(2S) \to \chi_c0\gamma) = (9.68 \pm 0.31)\%$.

$\Gamma(\pi^+ \pi^-)/\Gamma_{\text{total}} \quad \Gamma_{44}/\Gamma$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>&lt;0.20</b></td><td>90</td><td>1 ATHAR</td><td>07 CLEO</td><td>ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

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

<1.0 90 2 ABLIKIM 06R BES2 ψ(2S) → γχ<sub>c0</sub>

1 ATHAR 07 reports $< 0.21 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \pi^+\pi^-\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = 9.77 \times 10^{-2}$.

2 ABLIKIM 06R reports $< 1.1 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \pi^+\pi^-\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.2 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = 9.77 \times 10^{-2}$.

$\Gamma(\pi^+ \pi^-)/\Gamma_{\text{total}} \quad \Gamma_{45}/\Gamma$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>&lt;0.4</b></td><td>90</td><td>1 ATHAR</td><td>07 CLEO</td><td>ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

1 ATHAR 07 reports $< 0.38 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \pi^+\pi^-\eta')/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = 9.77 \times 10^{-2}$.

$\Gamma(\bar{K}^0 K^+ \pi^- + \text{c.c.})/\Gamma_{\text{total}} \quad \Gamma_{46}/\Gamma$

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><b>&lt;0.09</b></td><td>90</td><td>1 ATHAR</td><td>07 CLEO</td><td>ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td></tr></tbody></table>

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

<0.7 90 2,3 ABLIKIM 06R BES2 ψ(2S) → γχ<sub>c0</sub> 0.7 90 3,4 BAI 99B BES ψ(2S) → γχ<sub>c0</sub>

1 ATHAR 07 reports $< 0.10 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \bar{K}^0 K^+\pi^- + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.2 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = 9.77 \times 10^{-2}$.

2 ABLIKIM 06R reports $< 0.70 \times 10^{-3}$ from a measurement of $[\Gamma(\chi_c(1P) \to \bar{K}^0 K^+\pi^- + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_c(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_c(1P)) = (9.2 \pm 0.4) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_c(1P)) = 9.77 \times 10^{-2}$.

3 We have multiplied the $K^0 S K^+\pi^-$ measurement by a factor of 2 to convert to $K^0 K^+\pi^-$.

4 Rescaled by us using $B(\psi(2S) \to \gamma\chi_c0) = (9.4 \pm 0.4)\%$ and $B(\psi(2S) \to J/\psi(15)\pi^+\pi^-) = (32.6 \pm 0.5)\%$.
$$ \Gamma(\bar{p}\pi^-)/\Gamma_{\text{total}} \qquad \Gamma_{67}/\Gamma $$

$$ \begin{array}{l} \text{VALUE (units } 10^{-4}) \\ \mathbf{12.7 \pm 1.1 \text{ OUR AVERAGE}} \end{array} \qquad \begin{array}{l} \text{EVTS} \\ \mathbf{5150} \end{array} $$

<table>
  <tr>
    <td>12.9 ± 1.1 ± 0.3</td>
    <td>5150</td>
    <td>1 ABLIKIM</td>
    <td>12j</td>
    <td>BES3</td>
    <td>ψ(2S) → γpπ<sup>-</sup></td>
  </tr>
  <tr>
    <td>11.3 ± 3.1 ± 0.3</td>
    <td></td>
    <td>2 ABLIKIM</td>
    <td>06i</td>
    <td>BES2</td>
    <td>ψ(2S) → γpπ<sup>-</sup> X</td>
  </tr>
</table>

¹ ABLIKIM 12j reports $[\Gamma(\chi_{c0}(1P) \to p\bar{p}\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))] = (1.26 \pm 0.02 \pm 0.11) \times 10^{-4}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

² ABLIKIM 06i reports $[\Gamma(\chi_{c0}(1P) \to p\bar{p}\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))] = (1.10 \pm 0.24 \pm 0.18) \times 10^{-4}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table>
  <tr>
    <td>13.7 ± 1.2 ± 0.3</td>
    <td>5808</td>
    <td>1 ABLIKIM</td>
    <td>12j</td>
    <td>BES3</td>
    <td>ψ(2S) → γpπ<sup>-</sup>nπ<sup>+</sup></td>
  </tr>
</table>

¹ ABLIKIM 12j reports $[\Gamma(\chi_{c0}(1P) \to p\bar{n}\pi^+)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))] = (1.34 \pm 0.03 \pm 0.11) \times 10^{-4}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\bar{p}\pi^-\pi^0)/\Gamma_{\text{total}} \qquad \Gamma_{69}/\Gamma $$

<table>
  <tr>
    <td>23.4 ± 2.0 ± 0.5</td>
    <td>2480</td>
    <td>1 ABLIKIM</td>
    <td>12j</td>
    <td>BES3</td>
    <td>ψ(2S) → γpπ<sup>-</sup>π<sup>-</sup>0</td>
  </tr>
</table>

¹ ABLIKIM 12j reports $[\Gamma(\chi_{c0}(1P) \to p\bar{n}\pi^-\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))] = (2.29 \pm 0.08 \pm 0.18) \times 10^{-4}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(\bar{p}n\pi^+\pi^0)/\Gamma_{\text{total}} \qquad \Gamma_{70}/\Gamma $$

<table>
  <tr>
    <td>22.1 ± 1.8 ± 0.5</td>
    <td>2757</td>
    <td>1 ABLIKIM</td>
    <td>12j</td>
    <td>BES3</td>
    <td>ψ(2S) → γpπ<sup>-</sup>nπ<sup>+</sup>π<sup>0</sup></td>
  </tr>
</table>

¹ ABLIKIM 12j reports $[\Gamma(\chi_{c0}(1P) \to p\bar{n}\pi^+\pi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))] = (2.16 \pm 0.07 \pm 0.16) \times 10^{-4}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table>
  <tr>
    <td>118 ± 12 ± 3</td>
    <td>426</td>
    <td>1 ABLIKIM</td>
    <td>12j</td>
    <td>BES3</td>
    <td>ψ(2S) → γΛΛπ<sup>+</sup>π<sup>-</sup></td>
  </tr>
</table>

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

<400 90 ² ABLIKIM 06d BES2 ψ(2S) → χ<sub>c0</sub>γ

¹ ABLIKIM 12i reports $(119.0 \pm 6.4 \pm 11.4) \times 10^{-5}$ from a measurement of $[\Gamma(\chi_{c0}(1P) \to \Lambda\bar{\Lambda}\pi^+\pi^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.68 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

² Using $B(\psi(2S) \to \chi_{c0}\gamma) = (9.2 \pm 0.5)\%$

$$ \Gamma(\Lambda\bar{\Lambda}\pi^+\pi^- \text{ (non-resonant)})/\Gamma_{\text{total}} \qquad \Gamma_{73}/\Gamma $$

<table>
  <tr>
    <td>10<sup>-5</sup> (units</td>
    <td>CL%</td>
    <td>90</td>
    <td>1 ABLIKIM</td>
    <td>12j</td>
    <td>BES3</td>
    <td>ψ(2S) → γΛΛπ<sup>+</sup>π<sup>-</sup></td>
  </tr>
</table>

¹ ABLIKIM 12i reports < 54 × 10⁻⁵ from a measurement of $[\Gamma(\chi_{c0}(1P) \to \Lambda\bar{\Lambda}\pi^+\pi^- \text{ (non-resonant)})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.68 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = 9.77 \times 10^{-2}$.

$$ \Gamma(\Sigma(1385)^+\bar{\Lambda}\pi^- + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{74}/\Gamma $$

<table>
  <tr>
    <td>10<sup>-5</sup> (units</td>
    <td>CL%</td>
    <td>90</td>
    <td>1 ABLIKIM</td>
    <td>12j</td>
    <td>BES3</td>
    <td>ψ(2S) → γΣ(1385)<sup>+</sup>Λπ<sup>-</sup></td>
  </tr>
</table>

¹ ABLIKIM 12i reports < 55 × 10⁻⁵ from a measurement of $[\Gamma(\chi_{c0}(1P) \to \Sigma(1385)^+\bar{\Lambda}\pi^- + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.68 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = 9.77 \times 10^{-2}$.

$$ \Gamma(\Sigma(1385)^-\bar{\Lambda}\pi^+ + \text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{75}/\Gamma $$

<table>
  <tr>
    <td>10<sup>-5</sup> (units</td>
    <td>CL%</td>
    <td>90</td>
    <td>1 ABLIKIM</td>
    <td>12j</td>
    <td>BES3</td>
    <td>ψ(2S) → γΣ(1385)<sup>-</sup>Λπ<sup>+</sup></td>
  </tr>
</table>

¹ ABLIKIM 12i reports < 50 × 10⁻⁵ from a measurement of $[\Gamma(\chi_{c0}(1P) \to \Sigma(1385)^-\bar{\Lambda}\pi^+ + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.68 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = 9.77 \times 10^{-2}$.

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

$$ \begin{array}{l} \text{VALUE (units } 10^{-3}) \\ \mathbf{1.25 \pm 0.12 \text{ OUR AVERAGE}} \end{array} \qquad \begin{array}{l} \text{EVTS} \\ \mathbf{9k} \end{array} \qquad \begin{array}{l} \text{DOCUMENT ID} \\ \mathbf{1,2 \text{ ABLIKIM}} \end{array} \qquad \begin{array}{l} \text{TECN} \\ \mathbf{13D BES3} \end{array} \qquad \begin{array}{l} \text{COMMENT} \\ \mathbf{\psi(2S) \to \gamma\Lambda\bar{\Lambda}K^+} \end{array} $$

<table>
  <tr>
    <td>1.31 ± 0.09 ± 0.03</td>
    <td>9k</td>
    <td>1,2 ABLIKIM</td>
    <td>13D BES3</td>
    <td>ψ(2S) → γΛK<sup>+</sup></td>
  </tr>
  <tr>
    <td>1.01 ± 0.19 ± 0.02</td>
    <td>3 ATHAR</td>
    <td>07 CLEO</td>
    <td>ψ(2S) → γh<sup>+</sup>h<sup>-</sup>h<sup>0</sup></td>
    <td></td>
  </tr>
</table>

¹ ABLIKIM 13d reports $(1.32 \pm 0.03 \pm 0.10) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c0}(1P) \to K^+\bar{\Lambda}+\text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.68 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

² Using $B(\Lambda \to p\pi^-) = 63.9\%$.

³ ATHAR 07 reports $(1.07 \pm 0.17 \pm 0.12) \times 10^{-3}$ from a measurement of $[\Gamma(\chi_{c0}(1P) \to K^+\bar{\Lambda}+\text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table>
  <tr>
    <td>4.8 ± 0.9 ± 0.1</td>
    <td>254</td>
    <td>1 ABLIKIM</td>
    <td>19AU BES3</td>
    <td>ψ(2S) → γK<sup>+</sup>\bar{\Lambda}</td>
  </tr>
</table>

¹ ABLIKIM 19AU reports $[\Gamma(\chi_{c0}(1P) \to K^*(892)^+\bar{\Lambda}+\text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))] = (4.7 \pm 0.7 \pm 0.5) \times 10^{-5}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

<table>
  <tr>
    <td>3.0 ± 0.7 ± 0.1</td>
    <td>62 ± 12</td>
    <td>1 ABLIKIM</td>
    <td>11F BES3</td>
    <td>ψ(2S) → γp\bar{p}K<sup>+</sup>K<sup>-</sup></td>
  </tr>
</table>

¹ ABLIKIM 11F reports $(3.00 \pm 0.58 \pm 0.50) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{c0}(1P) \to K^+\bar{\Lambda}(1520) + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.62 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

$$ \Gamma(nK^0\bar{S}+\text{c.c.})/\Gamma_{\text{total}} \qquad \Gamma_{78}/\Gamma $$

<table>
  <tr>
    <td>6.7 ± 0.5 ± 0.2</td>
    <td>1284</td>
    <td>1 ABLIKIM</td>
    <td>21AV BES3</td>
    <td>ψ(2S) → nK<sup>0</sup>\bar{S} + c.c.</td>
  </tr>
</table>

¹ ABLIKIM 21AV reports $(6.65 \pm 0.26 \pm 0.41) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{c0}(1P) \to nK^0\bar{S} + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = 0.0979 \pm 0.0020$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value. Also uses $B(\bar{\Lambda} \to \bar{p}\pi^+) = (63.9 \pm 0.5)\%$ and $B(K^0\bar{S} \to \pi^+\pi^-) = (69.20 \pm 0.05)\%$.

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

<table>
  <tr>
    <td>3.1 ± 1.2 ± 0.1</td>
    <td>28 ± 10</td>
    <td>1 ABLIKIM</td>
    <td>11F BES3</td>
    <td>ψ(2S) → γp\bar{p}K<sup>+</sup>K<sup>-</sup></td>
  </tr>
</table>

¹ ABLIKIM 11F reports $(3.18 \pm 1.11 \pm 0.53) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{c0}(1P) \to \Lambda(1520)\bar{\Lambda}(1520))/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.62 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

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

$$ \begin{array}{l} \text{VALUE (units } 10^{-4}) \\ \mathbf{4.69 \pm 0.32 \text{ OUR AVERAGE}} \end{array} \qquad \begin{array}{l} \text{EVTS} \\ \mathbf{1046} \end{array} \qquad \begin{array}{l} \text{DOCUMENT ID} \\ \mathbf{1} \end{array} \qquad \begin{array}{l} \text{TECN} \\ \mathbf{18V BES3} \end{array} \qquad \begin{array}{l} \text{COMMENT} \\ \mathbf{\psi(2S) \to \gamma\Sigma^0\Sigma^0} \end{array} $$

<table>
  <tr>
    <td>4.83 ± 0.34 ± 0.11</td>
    <td>1046</td>
    <td>1 ABLIKIM</td>
    <td>18V BES3</td>
    <td>ψ(2S) → γΣ<sup>0</sup>Σ<sup>0</sup></td>
  </tr>
  <tr>
    <td>4.2 ± 0.7 ± 0.1</td>
    <td>78 ± 10</td>
    <td>2 NAIK</td>
    <td>08 CLEO</td>
    <td>ψ(2S) → γΣ<sup>0</sup>Σ<sup>0</sup></td>
  </tr>
</table>

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

4.7 ± 0.5 ± 0.1 243 3,4 ABLIKIM 13H BES3 ψ(2S) → γΣ<sup>0</sup>Σ<sup>0</sup>

¹ ABLIKIM 18V reports $[\Gamma(\chi_{c0}(1P) \to \Sigma^0\Sigma^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))] = (4.72 \pm 0.18 \pm 0.28) \times 10^{-5}$ which we divide by our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

² NAIK 08 reports $(4.41 \pm 0.56 \pm 0.47) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{c0}(1P) \to \Sigma^0\Sigma^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.22 \pm 0.11 \pm 0.46) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

³ ABLIKIM 13H reports $(4.78 \pm 0.34 \pm 0.39) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{c0}(1P) \to \Sigma^0\Sigma^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \to \gamma\chi_{c0}(1P))]$ assuming $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.62 \pm 0.31) \times 10^{-2}$, which we rescale to our best value $B(\psi(2S) \to \gamma\chi_{c0}(1P)) = (9.77 \pm 0.23) \times 10^{-2}$. Our first error is their experiment's error and our second error is the systematic error from using our best value.

⁴ Superseded by ABLIKIM 18V
# Meson Particle Listings

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

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

$\Gamma_{85}/\Gamma$

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

4.7 ±0.8 OUR AVERAGE Error includes scale factor of 2.6.

<table><tr><td>5.11 ±0.35 ±0.12</td><td>747</td><td>1 ABLIKIM</td><td>18V</td><td>BES3</td><td>ψ(2S) → γχ<sub>C0</sub>(1P) = (9.79 ± 0.2) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 10<sup>-2</sup>.</td></tr><tr><td>3.1 ±0.7 ±0.1</td><td>39 ± 7</td><td>2 NAIK</td><td>08</td><td>CLEO</td><td>ψ(2S) → γΣ<sup>+</sup>Σ<sup>-</sup></td></tr></table>

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

<table><tr><td>4.5 ±0.5 ±0.1</td><td>148</td><td>3,4 ABLIKIM</td><td>13H</td><td>BES3</td><td>ψ(2S) → γΣ<sup>+</sup>Σ<sup>-</sup></td></tr></table>

1 ABLIKIM 18V reports $[\Gamma(\chi_{C0}(1P) \rightarrow \Sigma^{+}\Sigma^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))] = (4.99 \pm 0.24 \pm 0.24) \times 10^{-5}$ which we divide by our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 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 NAIK 08 reports $(3.25 \pm 0.57 \pm 0.43) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \Sigma^{+}\Sigma^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.22 ± 0.11 ± 0.46) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 ABLIKIM 13H reports $(4.54 \pm 0.42 \pm 0.30) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \Sigma^{+}\Sigma^{-})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.62 ± 0.31) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

4 Superseded by ABLIKIM 18V

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

$\Gamma_{86}/\Gamma$

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

<table><tr><td>5.1 ±0.5 ±0.1</td><td>2143</td><td>1 ABLIKIM</td><td>201</td><td>BES3</td><td>ψ(2S) → γΣ<sup>-</sup>Σ<sup>+</sup></td></tr></table>

1 ABLIKIM 20I reports $(5.13 \pm 0.24 \pm 0.41) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \Sigma^-\Sigma^+)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.79 ± 0.20) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 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.

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

$\Gamma_{87}/\Gamma$

<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>

<table><tr><td>16.3 ±5.8 ±0.4</td><td>27</td><td>1 ABLIKIM</td><td>121</td><td>BES3</td><td>ψ(2S) → γΛπ<sup>+</sup>π<sup>-</sup></td></tr></table>

1 ABLIKIM 12I reports $(16.4 \pm 5.7 \pm 1.6) \times 10^{-5}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \Sigma(1385)^+\Sigma(1385)^-)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.68 ± 0.31) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 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.

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

$\Gamma_{88}/\Gamma$

<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>

<table><tr><td>23 ±7 ±1</td><td>33</td><td>1 ABLIKIM</td><td>121</td><td>BES3</td><td>ψ(2S) → γΛπ<sup>+</sup>π<sup>-</sup></td></tr></table>

1 ABLIKIM 12I reports $(23.5 \pm 6.2 \pm 2.3) \times 10^{-5}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \Sigma(1385)^-\Sigma(1385)^+)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.68 ± 0.31) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 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.

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

$\Gamma_{89}/\Gamma$

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

<table><tr><td>1.95 ±0.35 ±0.05</td><td>57</td><td>1 ABLIKIM</td><td>151</td><td>BES3</td><td>ψ(2S) → γK<sup>-</sup>ΛΣ<sup>+</sup> + c.c.</td></tr></table>

1 ABLIKIM 15I reports $[\Gamma(\chi_{C0}(1P) \rightarrow \kappa^-\Lambda\Sigma^+ + \text{c.c.})/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))] = (1.90 \pm 0.30 \pm 0.16) \times 10^{-5}$ which we divide by our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 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.

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

$\Gamma_{90}/\Gamma$

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

4.5 ±0.5 OUR AVERAGE Error includes scale factor of 1.7.

<table><tr><td>4.68 ±0.31 ±0.11</td><td>1741</td><td>1 ABLIKIM</td><td>220</td><td>BES3</td><td>ψ(2S) → γΞ<sup>0</sup>Ξ<sup>0</sup></td></tr><tr><td>3.2 ±0.8 ±0.1</td><td>23.3 ± 4.9</td><td>2 NAIK</td><td>08</td><td>CLEO</td><td>ψ(2S) → γΞ<sup>0</sup>Ξ<sup>0</sup></td></tr></table>

1 ABLIKIM 220 reports $(4.67 \pm 0.19 \pm 0.26) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \Xi^0\Xi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.79 ± 0.2) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 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 NAIK 08 reports $(3.34 \pm 0.70 \pm 0.48) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \Xi^0\Xi^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.22 ± 0.11 ± 0.46) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 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.

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

$\Gamma_{91}/\Gamma$

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

<table><tr><td>4.47 ±0.20 OUR AVERAGE</td><td>4932</td><td>1 ABLIKIM</td><td>220</td><td>BES3</td><td>ψ(2S) → γΞ<sup>-</sup>Σ<sup>+</sup></td></tr><tr><td>4.44 ±0.18 ±0.10</td><td>4932</td><td>2 NAIK</td><td>08</td><td>CLEO</td><td>ψ(2S) → γΞ<sup>+</sup>Σ<sup>-</sup></td></tr></table>

<table><tr><td>4.9 ±0.7 ±0.1</td><td>95</td><td></td><td></td><td></td><td></td></tr></table>

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

<table><tr><td>&lt;10.3</td><td>90</td><td>3 ABLIKIM</td><td>06B</td><td>BES2</td><td>ψ(2S) → γχ<sub>C0</sub>γ</td></tr></table>

1 ABLIKIM 220 reports $(4.43 \pm 0.08 \pm 0.18) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \Xi^0\Xi^+)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.79 ± 0.2) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 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 NAIK 08 reports $(5.14 \pm 0.60 \pm 0.47) \times 10^{-4}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \Xi^0\Xi^+)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.22 ± 0.11 ± 0.46) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.77 ± 0.23) × 10<sup>-2</sup>. Our first error is their experiment's error and our second error is the systematic error from using our best value.

3 Using B(ψ(2S) → χ<sub>C0</sub>γ) = (9.2 ± 0.5)%

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

$\Gamma_{92}/\Gamma$

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

<table><tr><td>3.51 ±0.54 ±0.29</td><td>284</td><td>ABLIKIM</td><td>23T</td><td>BES3</td><td>χ<sub>CJ</sub> → Ω<sup>-</sup>Σ<sup>+</sup></td></tr></table>

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

$\Gamma_{93}/\Gamma$

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

<table><tr><td>&lt; 7 × 10<sup>-4</sup></td><td>90</td><td>1,2 ABLIKIM</td><td>13B</td><td>BES3</td><td>e<sup>+</sup>e<sup>-</sup> → ψ(2S) → γχ<sub>C0</sub></td></tr></table>

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

<table><tr><td>&lt;41 × 10<sup>-4</sup></td><td>90</td><td>1,3 ABLIKIM</td><td>13B</td><td>BES3</td><td>e<sup>+</sup>e<sup>-</sup> → ψ(2S) → γχ<sub>C0</sub></td></tr></table>

1 Using $1.06 \times 10^8$ ψ(2S) mesons and B(ψ(2S) → χ<sub>C0</sub>γ) = (9.68 ± 0.31)%.

2 From the $\eta_c \rightarrow K^0_S K^\pm \pi^\mp$ decays.

3 From the $\eta_c \rightarrow K^+ K^- \pi^0$ decays.

$\Gamma(\bar{p}\rho)/\Gamma_{\text{total}} \times \Gamma(\pi\pi)/\Gamma_{\text{total}}$

$\Gamma_{58}/\Gamma \times \Gamma_{32}/\Gamma$

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

<table><tr><td>18.9 ±1.5 OUR FIT</td><td>Error includes scale factor of 1.5.</td></tr></table>

<table><tr><td>15.3 ±2.4 ±0.8</td><td>1 ANDREOTTI</td><td>03</td><td>E835</td><td>p̄ρ → χ<sub>C0</sub> → π<sup>0</sup>π<sup>0</sup></td></tr></table>

1 We have multiplied B(ρ̄ρ)·B(π<sup>0</sup>π<sup>0</sup>) measurement by 3 to obtain B(ρ̄ρ)·B(π).

$\Gamma(\bar{p}\rho)/\Gamma_{\text{total}} \times \Gamma(\pi^0\eta)/\Gamma_{\text{total}}$

$\Gamma_{58}/\Gamma \times \Gamma_{33}/\Gamma$

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

<table><tr><td>&lt;0.4</td><td>ANDREOTTI</td><td>05C</td><td>E835</td><td>p̄ρ → π<sup>0</sup>η</td></tr></table>

$\Gamma(\bar{p}\rho)/\Gamma_{\text{total}} \times \Gamma(\pi^0\eta')/\Gamma_{\text{total}}$

$\Gamma_{58}/\Gamma \times \Gamma_{34}/\Gamma$

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

<table><tr><td>&lt;2.5</td><td>ANDREOTTI</td><td>05C</td><td>E835</td><td>p̄ρ → π<sup>0</sup>η</td></tr></table>

$\Gamma(\bar{p}\rho)/\Gamma_{\text{total}} \times \Gamma(\eta\eta)/\Gamma_{\text{total}}$

$\Gamma_{58}/\Gamma \times \Gamma_{36}/\Gamma$

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

6.7 ±0.7 OUR FIT Error includes scale factor of 1.4.

<table><tr><td>4.0 ±1.2<sup>+0.5</sup><sub>-0.3</sub></td><td>ANDREOTTI</td><td>05C</td><td>E835</td><td>p̄ρ → ηη</td></tr></table>

$\Gamma(\bar{p}\rho)/\Gamma_{\text{total}} \times \Gamma(\eta\eta')/\Gamma_{\text{total}}$

$\Gamma_{58}/\Gamma \times \Gamma_{37}/\Gamma$

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

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

<table><tr><td>2.1<sup>+2.3</sup><sub>-1.5</sub></td><td>ANDREOTTI</td><td>05C</td><td>E835</td><td>p̄ρ → π<sup>0</sup>η</td></tr></table>

## RADIATIVE DECAYS

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

$\Gamma_{95}/\Gamma$

<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></table>

<table><tr><td>&lt; 9</td><td>90</td><td>1.2 ± 4.5</td><td>1 BENNETT</td><td>08A</td><td>CLEO</td><td>ψ(2S) → γγρ<sup>0</sup></td></tr></table>

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

<table><tr><td>&lt;10</td><td>90</td><td>6 ± 12</td><td>2 ABLIKIM</td><td>11E</td><td>BES3</td><td>ψ(2S) → γγρ<sup>0</sup></td></tr></table>

1 BENNETT 08A reports $< 9.6 \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \gamma\rho^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.62 ± 0.4) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = 9.77 × 10<sup>-2</sup>.

2 ABLIKIM 11E reports $< 10.5 \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \gamma\rho^0)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.62 ± 0.31) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = 9.77 × 10<sup>-2</sup>.

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

$\Gamma_{96}/\Gamma$

<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></table>

<table><tr><td>&lt; 8</td><td>90</td><td>0.0 ± 2.8</td><td>1 BENNETT</td><td>08A</td><td>CLEO</td><td>ψ(2S) → γγω</td></tr></table>

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

<table><tr><td>&lt;13</td><td>90</td><td>5 ± 11</td><td>2 ABLIKIM</td><td>11E</td><td>BES3</td><td>ψ(2S) → γγω</td></tr></table>

1 BENNETT 08A reports $< 8.8 \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \gamma\omega)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.2 ± 0.4) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = 9.77 × 10<sup>-2</sup>.

2 ABLIKIM 11E reports $< 12.9 \times 10^{-6}$ from a measurement of $[\Gamma(\chi_{C0}(1P) \rightarrow \gamma\omega)/\Gamma_{\text{total}}] \times [B(\psi(2S) \rightarrow \gamma\chi_{C0}(1P))]$ assuming B(ψ(2S) → γχ<sub>C0</sub>(1P)) = (9.62 ± 0.31) × 10<sup>-2</sup>, which we rescale to our best value B(ψ(2S) → γχ<sub>C0</sub>(1P)) = 9.77 × 10<sup>-2</sup>.