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

<table><tr><td>0.225</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr><tr><td>0.21 ±0.04</td><td>GOPAL</td><td>77</td><td>DPWA See GOPAL 80</td></tr><tr><td>0.52 or 0.49</td><td>2 MARTIN</td><td>77</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr><tr><td>0.30</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr><tr><td>0.15</td><td>ARMENTEROS70</td><td>69</td><td>DPWA <span style="text-decoration: overline">K</span> N → <span style="text-decoration: overline">K</span> N</td></tr><tr><td>0.55</td><td>BAILEY</td><td>69</td><td>DPWA <span style="text-decoration: overline">K</span> N → <span style="text-decoration: overline">K</span> N</td></tr><tr><td>0.4</td><td>ARMENTEROS68B</td><td>69</td><td>DPWA <span style="text-decoration: overline">K</span> N → <span style="text-decoration: overline">K</span> N</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

² The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

$$ \Gamma(\Sigma\pi)/\Gamma_{\text{total}} \qquad \Gamma_{2/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.16 ±0.05</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></tbody></table>

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

<table><tr><td>0.009</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(\Lambda\eta)/\Gamma_{\text{total}} \qquad \Gamma_{3/\Gamma} $$

<table><thead><tr><th>VALUE</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>0.111</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(\Xi K)/\Gamma_{\text{total}} \qquad \Gamma_{4/\Gamma} $$

<table><thead><tr><th>VALUE</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>0.051</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(\Sigma(1385)\pi)/\Gamma_{\text{total}} \qquad \Gamma_{5/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.40 ±0.15</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></tbody></table>

<table><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.600</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(N\bar{K}^*(892), S=1/2, P-wave)/\Gamma_{\text{total}} \qquad \Gamma_{7/\Gamma} $$

<table><thead><tr><th>VALUE</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>0.003</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$$ (\Gamma_1\Gamma_\tau)^{1/2}/\Gamma_{\text{total}} \text{ in } N\bar{K} \to \Lambda(1810) \to \Sigma\pi \qquad (\Gamma_1\Gamma_2)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.08 ±0.05</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.24 ±0.04</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></tbody></table>

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

<table><tr><td>+0.25 or +0.23</td><td>1 MARTIN</td><td>77</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr><tr><td>&lt; 0.01</td><td>LANGBEIN</td><td>72</td><td>IPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr><tr><td>0.17</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr><tr><td>+0.20</td><td>2 ARMENTEROS70</td><td>71</td><td>DPWA <span style="text-decoration: overline">K</span> N → Σπ</td></tr><tr><td>-0.13 ±0.03</td><td>BARBARO...</td><td>70</td><td>DPWA <span style="text-decoration: overline">K</span> N → Σπ</td></tr></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

² The published sign has been changed to be in accord with the baryon-first convention.

$$ (\Gamma_1\Gamma_\tau)^{1/2}/\Gamma_{\text{total}} \text{ in } N\bar{K} \to \Lambda(1810) \to \Sigma(1385)\pi \qquad (\Gamma_1\Gamma_5)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>+0.18 ±0.10</td><td>PREVOST</td><td>74</td><td>DPWA <span style="text-decoration: overline">K</span> N → Σ(1385)π</td></tr></tbody></table>

$$ (\Gamma_1\Gamma_\tau)^{1/2}/\Gamma_{\text{total}} \text{ in } N\bar{K} \to \Lambda(1810) \to N\bar{K}^*(892), S=1/2, P-wave \quad (\Gamma_1\Gamma_7)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.14 ±0.03</td><td>1 CAMERON</td><td>78B</td><td>DPWA <span style="text-decoration: overline">K</span> p → N\bar{K}*</td></tr></tbody></table>

¹ The published sign has been changed to be in accord with the baryon-first convention.

$$ (\Gamma_1\Gamma_\tau)^{1/2}/\Gamma_{\text{total}} \text{ in } N\bar{K} \to \Lambda(1810) \to N\bar{K}^*(892), S=3/2, P-wave \quad (\Gamma_1\Gamma_8)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>+0.38 ±0.06</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>+0.35 ±0.06</td><td>CAMERON</td><td>78B</td><td>DPWA <span style="text-decoration: overline">K</span> p → N\bar{K}*</td></tr></tbody></table>

Λ(1810) REFERENCES

<table><tr><td>SARANTSEV</td><td>19</td><td>EPJ A55 180</td><td>A.V. Sarantsev et al.</td><td>(BONN, PNPI)</td></tr><tr><td>KAMANO</td><td>15</td><td>PR C92 025205</td><td>H. Kamano et al.</td><td>(ANL, OSAK)</td></tr><tr><td>ZHANG</td><td>13A</td><td>PR C88 035205</td><td>H. Zhang et al.</td><td>(KSU)</td></tr><tr><td>GOPAL</td><td>80</td><td>Toronto Conf. 159</td><td>G.P. Gopal</td><td>(RHEL) IJP</td></tr><tr><td>CAMERON</td><td>78B</td><td>NP B146 327</td><td>W. Cameron et al.</td><td>(RHEL, LOIC) IJP</td></tr><tr><td>GOPAL</td><td>77</td><td>NP B119 362</td><td>G.P. Gopal et al.</td><td>(LOIC, RHEL) IJP</td></tr><tr><td>MARTIN</td><td>77</td><td>NP B127 349</td><td>B.R. Martin, M.K. Pidcock, R.G. Moorhouse</td><td>(LOUC+) IJP</td></tr><tr><td>Also</td><td>77</td><td>NP B126 266</td><td>B.R. Martin, M.K. Pidcock</td><td>(LOUC)</td></tr><tr><td>Also</td><td>77</td><td>NP B126 285</td><td>B.R. Martin, M.K. Pidcock</td><td>(LOUC) IJP</td></tr><tr><td>CARROLL</td><td>76</td><td>PRL 37 806</td><td>A.S. Carroll et al.</td><td>(BNL) I</td></tr></table>

<table><tr><td>PREVOST</td><td>74</td><td>NP B69 246</td><td>J. Prevost et al.</td><td>(SACL, CERN, HEID)</td></tr><tr><td>LANGBEIN</td><td>72</td><td>NP B47 477</td><td>W. Langbein, F. Wagner</td><td>(MPIM) IJP</td></tr><tr><td>KIM</td><td>71</td><td>PRL 27 356</td><td>J.K. Kim</td><td>(HARV) IJP</td></tr><tr><td>Also</td><td></td><td>Duke Conf. 161</td><td>J.K. Kim</td><td>(HARV) IJP</td></tr><tr><td>Hyperon Resonances, 1970</td><td></td><td></td><td></td><td></td></tr><tr><td>ARMENTEROS 70</td><td></td><td>Duke Conf. 123</td><td>R. Armenteros et al.</td><td>(CERN, HEID, SACL) IJP</td></tr><tr><td>Hyperon Resonances, 1970</td><td></td><td></td><td></td><td></td></tr><tr><td>BARBARO...</td><td>70</td><td>Duke Conf. 173</td><td>A. Barbaro-Gattieri</td><td>(LRL) IJP</td></tr><tr><td>Hyperon Resonances, 1970</td><td></td><td></td><td></td><td></td></tr><tr><td>BAILEY</td><td>69</td><td>Theis CLRL 50617</td><td>J.M. Bailey</td><td>(LLL) IJP</td></tr><tr><td>ARMENTEROS 68B</td><td>69</td><td>NP B8 195</td><td>R. Armenteros et al.</td><td>(CERN, HEID, SACL) IJP</td></tr></table>

$$ \Lambda(1820) 5/2^+ $$

$$ I(J^P) = 0(\frac{5}{2}^+) \text{ Status: } **** $$

This resonance is the cornerstone for all partial-wave analyses in this region. Most of the results published before 1973 are now obsolete and have been omitted. They may be found in our 1982 edition Physics Letters 111B 1 (1982).

Λ(1820) POLE POSITION

REAL PART

VALUE (MeV) DOCUMENT ID TECN COMMENT

1812 to 1825 (≈ 1818) OUR ESTIMATE

<table><tr><td>1813 ±3</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr><tr><td>1824 ±2</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></table>

<table><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1814</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

-2×IMAGINARY PART

VALUE (MeV) DOCUMENT ID TECN COMMENT

75 to 80 (≈ 77) OUR ESTIMATE

<table><tr><td>78 ±7</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr><tr><td>77 ±2</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></table>

<table><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>85</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Λ(1820) POLE RESIDUES

The normalized residue is the residue divided by $\Gamma_{pole}/2$.

Normalized residue in $N\bar{K} \to \Lambda(1820) \to N\bar{K}$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.60 ±0.12</td><td>-22 ± 5</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></tbody></table>

<table><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.558</td><td>-13</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1820) \to \Sigma\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.34 ±0.07</td><td>174 ± 5</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></tbody></table>

<table><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.357</td><td>168</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1820) \to \Lambda\eta$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</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></tr><tr><td>0.0184</td><td>-3</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1820) \to \Xi K$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>~0</td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></tbody></table>

<table><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.00111</td><td>70</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1820) \to \Sigma(1385)\pi, P-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.07 ±0.02</td><td>-60 ± 50</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></tbody></table>

<table><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.340</td><td>161</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1820) \to \Sigma(1385)\pi, F-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.11 ±0.04</td><td>5 ± 45</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></tbody></table>

<table><tr><td>• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.201</td><td>151</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline">K</span> N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.
Normalized residue in $N\bar{K} \to \Lambda(1820) \to N\bar{K}^*(892), S=1/2, F-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.02 ±0.02</td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.00750</td><td>41</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1820) \to N\bar{K}^*(892), S=3/2, P-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.35 ±0.15</td><td>-30 ±45</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.171</td><td>-139</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1820) \to N\bar{K}^*(892), S=3/2, F-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.02 ±0.02</td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.000517</td><td>161</td><td>1 KAMANO</td><td>15</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

Λ(1820) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>1815 to 1825 (≈ 1820) OUR ESTIMATE</strong></td></tr><tr><td>1822 ±4</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>1823.5 ±0.8</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>1823 ±3</td><td>GOPAL</td><td>80</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>1819 ±2</td><td>ALSTON-...</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>1821 ±2</td><td>KANE</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span>⁻p → Σπ</td></tr></tbody></table>

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

<table><tbody><tr><td>1830</td><td>DECLAIS</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>1822 ±2</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>1817 or 1819</td><td>1 MARTIN</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

Λ(1820) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>70 to 90 (≈ 80) OUR ESTIMATE</strong></td></tr><tr><td>80 ±8</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>89 ±2</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>77 ±5</td><td>GOPAL</td><td>80</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>72 ±5</td><td>ALSTON-...</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>87 ±3</td><td>KANE</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span>⁻p → Σπ</td></tr></tbody></table>

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

<table><tbody><tr><td>82</td><td>DECLAIS</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>81 ±5</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>76 or 76</td><td>1 MARTIN</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

Λ(1820) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>i</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> N<span style="text-decoration: overline;">K</span></td><td>55–65 %</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>8–14 %</td></tr><tr><td>Γ<sub>3</sub> Σ(1385)π</td><td>5–10 %</td></tr><tr><td>Γ<sub>4</sub> Σ(1385)π, P-wave</td><td></td></tr><tr><td>Γ<sub>5</sub> Σ(1385)π, F-wave</td><td>(2.0±1.0) %</td></tr><tr><td>Γ<sub>6</sub> Λη</td><td></td></tr><tr><td>Γ<sub>7</sub> ΞK</td><td></td></tr><tr><td>Γ<sub>8</sub> Σππ</td><td></td></tr><tr><td>Γ<sub>9</sub> N<span style="text-decoration: overline;">K</span>*(892), S=1/2, F-wave</td><td></td></tr><tr><td>Γ<sub>10</sub> N<span style="text-decoration: overline;">K</span>*(892), S=3/2, P-wave</td><td>(3.0±1.0) %</td></tr><tr><td>Γ<sub>11</sub> N<span style="text-decoration: overline;">K</span>*(892), S=3/2, F-wave</td><td></td></tr></tbody></table>

Λ(1820) BRANCHING RATIOS

Errors quoted do not include uncertainties in the parametrizations used in the partial-wave analyses and are thus too small. See also “Sign conventions for resonance couplings” in the Note on Λ and Σ Resonances.

<table><thead><tr><th>Γ(N<span style="text-decoration: overline;">K</span>) / Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>0.55 to 0.65 OUR ESTIMATE</strong></td></tr><tr><td>0.58 ±0.12</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>0.54 ±0.01</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>0.58 ±0.02</td><td>GOPAL</td><td>80</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>0.60 ±0.03</td><td>ALSTON-...</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr></tbody></table>

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

0.547 1 KAMANO 15 DPWA <span style="text-decoration: overline;">K</span>N multichannel

0.51 1 KAMANO 77 DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N

0.57 ±0.02 1 KAMANO 77 DPWA See GOPAL 80

0.59 or 0.58 2 MARTIN 77 DPWA <span style="text-decoration: overline;">K</span>N multichannel

¹ From the preferred solution A in KAMANO 15.

² The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

<table><thead><tr><th>Γ(Σπ) / Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.19 ±0.04</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

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

0.218 1 KAMANO 15 DPWA <span style="text-decoration: overline;">K</span>N multichannel

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>Γ(Σ(1385)π, P-wave) / Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>~ 0.01</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

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

0.173 1 KAMANO 15 DPWA <span style="text-decoration: overline;">K</span>N multichannel

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>Γ(Σ(1385)π, F-wave) / Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.02 ±0.01</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

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

0.055 1 KAMANO 15 DPWA <span style="text-decoration: overline;">K</span>N multichannel

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>Γ(Λη) / Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.001</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>Γ(ΞK) / Γ<sub>total</sub></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><tr><td>not seen</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>Γ(Σππ) / Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>no clear signal</td><td>1 ARMENTEROS68C</td><td>HDBC</td><td><span style="text-decoration: overline;">K</span>⁻N → Σππ</td></tr></tbody></table>

¹ There is a suggestion of a bump, enough to be consistent with what is expected from Σ(1385) → Σπ decay.

<table><thead><tr><th>Γ(N<span style="text-decoration: overline;">K</span>*(892), S=1/2, F-wave) / Γ<sub>total</sub></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><tr><td>not seen</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>Γ(N<span style="text-decoration: overline;">K</span>*(892), S=3/2, P-wave) / Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.03 ±0.01</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

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

0.006 1 KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>Γ(N<span style="text-decoration: overline;">K</span>*(892), S=3/2, F-wave) / Γ<sub>total</sub></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><tr><td>not seen</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup> / Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → Λ(1820) → Σπ</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.28 ±0.01</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.28 ±0.03</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>-0.28 ±0.01</td><td>KANE</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span>⁻p → Σπ</td></tr></tbody></table>

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

-0.25 or -0.25 1 MARTIN 77 DPWA <span style="text-decoration: overline;">K</span>N multichannel

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

<table><thead><tr><th>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup> / Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → Λ(1820) → Σ(1385)π, P-wave</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.20 ±0.02</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.167 ±0.054</td><td>1 CAMERON</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>⁻p → Σ(1385)π</td></tr><tr><td>+0.27 ±0.03</td><td>PREVOST</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span>⁻N → Σ(1385)π</td></tr></tbody></table>

¹ The published sign has been changed to be in accord with the baryon-first convention.
# Baryon Particle Listings

## Λ(1820), Λ(1830)

$$ \begin{array}{lcccc} \text{(Γ₁Γ₃)}^{1/2}/\Gamma_{\text{total in N}^2\bar{K}} & \rightarrow & \Lambda(1820) & \rightarrow & \Sigma(1385)\pi, \text{ F-wave} \\ \text{VALUE} & \text{DOCUMENT ID} & \text{TECN} & \text{COMMENT} & \\ +0.065 \pm 0.029 & 1 \text{ CAMERON} & 78 & \text{DPWA} & K^- p \rightarrow \Sigma(1385)\pi \end{array} $$

¹ The published sign has been changed to be in accord with the baryon-first convention.

$$ \begin{array}{lcccc} \text{(Γ₁Γ₃)}^{1/2}/\Gamma_{\text{total in N}^2\bar{K}} & \rightarrow & \Lambda(1820) & \rightarrow & \Lambda\eta \\ \text{VALUE} & \text{DOCUMENT ID} & \text{TECN} & \text{COMMENT} & \\ -0.096 & -0.040 & \text{RADER} & 73 & \text{MPWA} \end{array} $$

## Λ(1820) REFERENCES

<table><tr><td>SARANTSEV</td><td>19</td><td>EPJ A55 180</td><td>A.V. Sarantsev et al.</td><td>(BONN, PNPI)</td></tr><tr><td>KAMANO</td><td>15</td><td>PR C92 025205</td><td>H. Kamano et al.</td><td>(ANL, OSAK)</td></tr><tr><td>ZHANG</td><td>13A</td><td>PR C88 035205</td><td>H. Zhang et al.</td><td>(KSU)</td></tr><tr><td>PDG</td><td>82</td><td>PL 111B 1</td><td>M. Roos et al.</td><td>(HELS, CIT, CERN)</td></tr><tr><td>GOPAL</td><td>80</td><td>Toronto Conf. 159</td><td>G.P. Gopal</td><td>(RHEL) IJP</td></tr><tr><td>ALSTON...</td><td>78</td><td>PR D18 182</td><td>M. Alston-Garnjost et al.</td><td>(LBL, MTHO+) IJP</td></tr><tr><td>Also</td><td></td><td>PRL 38 1007</td><td>M. Alston-Garnjost et al.</td><td>(LBL, MTHO+) IJP</td></tr><tr><td>CAMERON</td><td>78</td><td>NP B143 189</td><td>W. Cameron et al.</td><td>(RHEL, LOIC) IJP</td></tr><tr><td>DECLAIS</td><td>77</td><td>CERN 77-16</td><td>Y. Declais et al.</td><td>(CAEN, CERN) IJP</td></tr><tr><td>GOPAL</td><td>77</td><td>NP B119 362</td><td>G.P. Gopal et al.</td><td>(LOIC, RHEL) IJP</td></tr><tr><td>MARTIN</td><td>77</td><td>NP B127 349</td><td>B.R. Martin, M.K. Pidcock, R.G. Moorhouse (LOUC+) IJP</td><td></td></tr><tr><td>Also</td><td></td><td>NP B126 266</td><td>B.R. Martin, M.K. Pidcock</td><td>(LOUC)</td></tr><tr><td>Also</td><td></td><td>NP B126 285</td><td>B.R. Martin, M.K. Pidcock</td><td>(LOUC) IJP</td></tr><tr><td>KANE</td><td>74</td><td>LBL-2452</td><td>D.F. Kane</td><td>(LBL) IJP</td></tr><tr><td>PREVOST</td><td>74</td><td>NP B69 246</td><td>J. Prevost et al.</td><td>(SACL, CERN, HEID)</td></tr><tr><td>RADER</td><td>73</td><td>NC 16A 178</td><td>R.K. Rader et al.</td><td>(SACL, HEID, CERN+)</td></tr><tr><td>ARMENTEROS 68C</td><td></td><td>NP B8 216</td><td>R. Armenteros et al.</td><td>(CERN, HEID, SACL) I</td></tr></table>

$$ \Lambda(1830) 5/2^{-} $$

$$ I(J^P) = 0(\frac{5}{2}^-) \text{ Status: ****} $$

For results published before 1973 (they are now obsolete), see our 1982 edition Physics Letters **111B** 1 (1982).

The best evidence for this resonance is in the Σπ channel.

## Λ(1830) POLE POSITION

### REAL PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>1800 to 1860 (≈ 1830) OUR ESTIMATE</strong></td></tr><tr><td>1819.5 ± 3.0</td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td>1899 <sup>+35</sup><sub>-37</sub></td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1766 <sup>+37</sup><sub>-34</sub></td><td>2 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr><tr><td>1809</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ The preferred solution A in KAMANO 15 reports two poles. This entry is from the preferred solution A.

² From the preferred solution A in KAMANO 15. Not seen in solution B.

### −2×IMAGINARY PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>50 to 80 (≈ 65) OUR ESTIMATE</strong></td></tr><tr><td>62 ± 5</td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td>80 <sup>+100</sup><sub>-34</sub></td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>212 <sup>+94</sup><sub>-62</sub></td><td>2 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr><tr><td>109</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ The preferred solution A in KAMANO 15 reports two poles. This entry is from the preferred solution A.

² From the preferred solution A in KAMANO 15. Not seen in solution B.

## Λ(1830) POLE RESIDUES

The normalized residue is the residue divided by Γpole/2.

### Normalized residue in N̅K → Λ(1830) → N̅K

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.055 ± 0.010</td><td>20 ± 14</td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.00502</td><td>-80</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̅K → Λ(1830) → Σπ

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.15 ± 0.03</td><td>180 ± 10</td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.00581</td><td>179</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̅K → Λ(1830) → Λη

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.00941</td><td>-65</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̅K → Λ(1830) → ΞK

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.010 ± 0.005</td><td>65 ± 20</td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.0477</td><td>94</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̅K → Λ(1830) → Σ(1385)π, D-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.10 ± 0.04</td><td>10 ± 25</td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.0237</td><td>113</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̅K → Λ(1830) → Σ(1385)π, G-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.03 ± 0.02</td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.000726</td><td>127</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̅K → Λ(1830) → N̅K*(892), S=1/2, D-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.0278</td><td>-177</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̅K → Λ(1830) → N̅K*(892), S=3/2, D-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.0255</td><td>3</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̅K → Λ(1830) → N̅K*(892), S=3/2, G-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.00773</td><td>-17</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̅K → Λ(1830) → Λω, S=1/2, D-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.04 ± 0.03</td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr></tbody></table>

### Normalized residue in N̅K → Λ(1830) → Λω, S=3/2, D-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.05 ± 0.03</td><td>-110 ± 35</td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr></tbody></table>

## Λ(1830) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>1820 to 1830 (≈ 1825) OUR ESTIMATE</strong></td></tr><tr><td>1821 ± 3</td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td>1820 ± 4</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>1831 ± 10</td><td>GOPAL</td><td>80</td><td>DPWA K<sup>-</sup> N → K̅N</td></tr><tr><td>1825 ± 10</td><td>GOPAL</td><td>77</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td>1825 ± 1</td><td>KANE</td><td>74</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1817 or 1818</td><td>1 MARTIN</td><td>77</td><td>DPWA K<sup>-</sup> N multichannel</td></tr></tbody></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

## Λ(1830) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>60 to 120 (≈ 90) OUR ESTIMATE</strong></td></tr><tr><td>64 ± 7</td><td>SARANTSEV</td><td>19</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td>114 ± 10</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>100 ± 10</td><td>GOPAL</td><td>80</td><td>DPWA K<sup>-</sup> N → K̅N</td></tr><tr><td>94 ± 10</td><td>GOPAL</td><td>77</td><td>DPWA K<sup>-</sup> N multichannel</td></tr><tr><td>119 ± 3</td><td>KANE</td><td>74</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>56 or 56</td><td>1 MARTIN</td><td>77</td><td>DPWA K<sup>-</sup> N multichannel</td></tr></tbody></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.
Λ(1830) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>j</sub>/Γ)</th><th>Scale factor</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> N<span style="text-decoration: overline">K</span></td><td>0.04 to 0.08</td><td></td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>35–75 %</td><td></td></tr><tr><td>Γ<sub>3</sub> ΞK</td><td></td><td></td></tr><tr><td>Γ<sub>4</sub> Σ(1385)π</td><td>>15 %</td><td></td></tr><tr><td>Γ<sub>5</sub> Σ(1385)π, D-wave</td><td>(40 ±15) %</td><td>3.2</td></tr><tr><td>Γ<sub>6</sub> Σ(1385)π, G-wave</td><td></td><td></td></tr><tr><td>Γ<sub>7</sub> Λη</td><td></td><td></td></tr><tr><td>Γ<sub>8</sub> N<span style="text-decoration: overline">K</span>*(892), S=1/2, D-wave</td><td></td><td></td></tr><tr><td>Γ<sub>9</sub> N<span style="text-decoration: overline">K</span>*(892), S=3/2, D-wave</td><td></td><td></td></tr><tr><td>Γ<sub>10</sub> N<span style="text-decoration: overline">K</span>*(892), S=3/2, G-wave</td><td></td><td></td></tr></tbody></table>

Λ(1830) BRANCHING RATIOS

See “Sign conventions for resonance couplings” in the Note on Λ and Σ Resonances.

<table><caption>Γ(N<span style="text-decoration: overline">K</span>) / Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>0.04 to 0.08 OUR ESTIMATE</strong></td></tr><tr><td>0.055 ± 0.010</td><td>SARANTSEV</td><td>19</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr><tr><td>0.041 ± 0.005</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>0.08 ± 0.03</td><td>GOPAL</td><td>80</td><td>DPWA K<span style="text-decoration: overline">N</span> → K<span style="text-decoration: overline">N</span></td></tr><tr><td>0.02 ± 0.02</td><td>ALSTON-...</td><td>78</td><td>DPWA K<span style="text-decoration: overline">N</span> → K<span style="text-decoration: overline">N</span></td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.006</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr><tr><td>0.04 ± 0.03</td><td>GOPAL</td><td>77</td><td>DPWA See GOPAL 80</td></tr><tr><td>0.04 or 0.04</td><td>2 MARTIN</td><td>77</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

² The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

<table><caption>Γ(Σπ) / Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.42 ± 0.08</strong></td><td></td><td></td><td></td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.017</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><caption>Γ(ΞK) / Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.562</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><caption>Γ(Σ(1385)π, D-wave) / Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.40 ± 0.15 OUR AVERAGE</strong></td><td>Error includes scale factor of 3.2.</td><td></td><td></td></tr><tr><td>0.20 ± 0.08</td><td>SARANTSEV</td><td>19</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr><tr><td>0.52 ± 0.06</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr></tbody></table>



¹ From the preferred solution A in KAMANO 15.

<table><caption>Γ(Σ(1385)π, G-wave) / Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.020 ± 0.015</td><td>SARANTSEV</td><td>19</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr></tbody></table>

<table><caption>Γ(Λη) / Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.024</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><caption>Γ(N<span style="text-decoration: overline">K</span>*(892), S=1/2, D-wave) / Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.134</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><caption>Γ(N<span style="text-decoration: overline">K</span>*(892), S=3/2, D-wave) / Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.115</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><caption>Γ(N<span style="text-decoration: overline">K</span>*(892), S=3/2, G-wave) / Γ<sub>total</sub></caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.009</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

<table><caption>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline">K</span> → Λ(1830) → Σπ</caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.13 ± 0.01</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.17 ± 0.03</td><td>GOPAL</td><td>77</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr><tr><td>-0.15 ± 0.01</td><td>KANE</td><td>74</td><td>DPWA K<span style="text-decoration: overline">N</span> → Σπ</td></tr></tbody></table>

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



¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

<table><caption>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline">K</span> → Λ(1830) → Σ(1385)π</caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>0.20 to 0.50 OUR ESTIMATE</strong></td></tr><tr><td>+0.141 ± 0.014</td><td>1 CAMERON</td><td>78</td><td>DPWA K<span style="text-decoration: overline">N</span> → Σ(1385)π</td></tr><tr><td>+0.13 ± 0.03</td><td>PREVOST</td><td>74</td><td>DPWA K<span style="text-decoration: overline">N</span> → Σ(1385)π</td></tr></tbody></table>

¹ The CAMERON 78 upper limit on G-wave decay is 0.03. The published sign has been changed to be in accord with the baryon-first convention.

<table><caption>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline">K</span> → Λη</caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.044 ± 0.020</td><td>RADER</td><td>73</td><td>MPWA</td></tr></tbody></table>

Λ(1830) REFERENCES

<table><tr><td>SARANTSEV</td><td>19</td><td>EPJ A55 180</td><td>A.V. Sarantsev et al. (BONN, PNPI)</td></tr><tr><td>KAMANO</td><td>15</td><td>PR C92 025205</td><td>H. Kamano et al. (ANL, OSAK)</td></tr><tr><td>ZHANG</td><td>13A</td><td>PR C88 035205</td><td>H. Zhang et al. (KSU)</td></tr><tr><td>PDG</td><td>82</td><td>PL 111B 1</td><td>(HELS, CIT, CERN)</td></tr><tr><td>GOPAL</td><td>80</td><td>Toronto Conf. 159</td><td>(RHEL) UP</td></tr><tr><td>ALSTON-...</td><td>78</td><td>PR D18 182</td><td>(LBL, MTHO+) UP</td></tr><tr><td>Also</td><td>78</td><td>PRL 38 1007</td><td>(LBL, MTHO+) UP</td></tr><tr><td>CAMERON</td><td>78</td><td>NP B143 189</td><td>(RHEL, LOIC) UP</td></tr><tr><td>GOPAL</td><td>77</td><td>NP B119 362</td><td>(LOIC, RHEL) UP</td></tr><tr><td>MARTIN</td><td>77</td><td>NP B127 349</td><td>(LOUC) UP</td></tr><tr><td>Also</td><td>77</td><td>NP B126 266</td><td>(LOUC)</td></tr><tr><td>Also</td><td>77</td><td>NP B126 285</td><td>(LOUC) UP</td></tr><tr><td>KANE</td><td>74</td><td>LBL-2452</td><td>(LBL) UP</td></tr><tr><td>PREVOST</td><td>74</td><td>NP B69 246</td><td>(SACL, CERN, HEID)</td></tr><tr><td>RADER</td><td>73</td><td>NC 16A 178</td><td>(SACL, HEID, CERN+)</td></tr></table>

$$\Lambda(1890) 3/2^+$$

$$I(J^P) = 0(\frac{3}{2}^+) \text{ Status: } \*\*\*\*$$

For results published before 1974 (they are now obsolete), see our 1982 edition Physics Letters **111B** 1 (1982).

Λ(1890) POLE POSITION

REAL PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>1872 ± 5</strong></td><td></td><td></td><td></td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr></tbody></table>

<table><tr><td>1859<sup>+5</sup><sub>-7</sub></td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr><tr><td>1876</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15, incompatible with solution B.

-2×IMAGINARY PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>101 ± 10</strong></td><td></td><td></td><td></td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr></tbody></table>

<table><tr><td>113<sup>+20</sup><sub>-4</sub></td><td>1 KAMANO</td><td>15</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr><tr><td>145</td><td>ZHANG</td><td>13A</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15, incompatible with solution B.

Λ(1890) POLE RESIDUE

The “normalized residue” is the residue divided by $Γ_{pole}/2$.

Normalized residue in K<span style="text-decoration: overline">N</span> → Λ(1890) → K<span style="text-decoration: overline">N</span>

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.30 ± 0.06</strong></td><td><strong>0 ± 10</strong></td><td>SARANTSEV</td><td>19</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr></tbody></table>

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

<table><tr><td>0.241</td><td>-23</td><td>1 KAMANO</td><td>15</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in N<span style="text-decoration: overline">K</span> → Λ(1890) → Σπ

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.14 ± 0.05</strong></td><td><strong>148 ± 12</strong></td><td>SARANTSEV</td><td>19</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr></tbody></table>

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

<table><tr><td>0.101</td><td>104</td><td>1 KAMANO</td><td>15</td><td>DPWA K<span style="text-decoration: overline">N</span> multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.
# Baryon Particle Listings

## Λ(1890)

### Normalized residue in $N\bar{K} \to \Lambda(1890) \to \Lambda\eta$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0.0485</td><td>-54</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in $N\bar{K} \to \Lambda(1890) \to \Xi K$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.065 ±0.020</td><td>160 ±30</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0.0562</td><td>-85</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in $N\bar{K} \to \Lambda(1890) \to \Sigma(1385)\pi, P$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.11 ±0.05</td><td>-160 ±45</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0.295</td><td>-40</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in $N\bar{K} \to \Lambda(1890) \to \Sigma(1385)\pi, F$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.10 ±0.04</td><td>10 ±50</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0.064</td><td>127</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in $N\bar{K} \to \Lambda(1890) \to N\bar{K}*(892), S=1/2, P$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.03 ±0.03</td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0.188</td><td>-160</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in $N\bar{K} \to \Lambda(1890) \to N\bar{K}*(892), S=3/2, P$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.05 ±0.03</td><td>180 ±40</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0.209</td><td>15</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in $N\bar{K} \to \Lambda(1890) \to N\bar{K}*(892), S=3/2, F$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td></td><td></td><td></td><td></td><td></td></tr><tr><td>0.0141</td><td>129</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in $N\bar{K} \to \Lambda(1890) \to \Lambda\omega, S=1/2, P$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.24 ±0.06</td><td>15 ±20</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

### Normalized residue in $N\bar{K} \to \Lambda(1890) \to \Lambda\omega, S=3/2, P$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.15 ±0.08</td><td>-165 ±20</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

## Λ(1890) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>1870 to 1910 (≈ 1890) OUR ESTIMATE</strong></td></tr><tr><td>1873 ± 5</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td>1900 ± 5</td><td>ZHANG</td><td>13A</td><td>DPWA K̄N multichannel</td></tr><tr><td>1897 ± 5</td><td>GOPAL</td><td>80</td><td>DPWA K̄N → K̄N</td></tr><tr><td>1908 ± 10</td><td>ALSTON-...</td><td>78</td><td>DPWA K̄N → K̄N</td></tr><tr><td>1894 ± 10</td><td>HEMINGWAY</td><td>75</td><td>DPWA K̄p → K̄N</td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>1900 ± 5</td><td>GOPAL</td><td>77</td><td>DPWA K̄N multichannel</td></tr><tr><td>1856 or 1868</td><td>1 MARTIN</td><td>77</td><td>DPWA K̄N multichannel</td></tr><tr><td>1900</td><td>2 NAKKASYAN</td><td>75</td><td>DPWA K̄p → Λω</td></tr></tbody></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

² Found in one of two best solutions.

## Λ(1890) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>80 to 160 (≈ 120) OUR ESTIMATE</strong></td></tr><tr><td>103 ±10</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td>161 ±15</td><td>ZHANG</td><td>13A</td><td>DPWA K̄N multichannel</td></tr><tr><td>74 ±10</td><td>GOPAL</td><td>80</td><td>DPWA K̄N → K̄N</td></tr><tr><td>119 ±20</td><td>ALSTON-...</td><td>78</td><td>DPWA K̄N → K̄N</td></tr><tr><td>107 ±10</td><td>HEMINGWAY</td><td>75</td><td>DPWA K̄p → K̄N</td></tr></tbody></table>

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

<table><tbody><tr><td>72 ±10</td><td>GOPAL</td><td>77</td><td>DPWA K̄N multichannel</td></tr><tr><td>191 or 193</td><td>1 MARTIN</td><td>77</td><td>DPWA K̄N multichannel</td></tr><tr><td>100</td><td>2 NAKKASYAN</td><td>75</td><td>DPWA K̄p → Λω</td></tr></tbody></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

² Found in one of two best solutions.

## Λ(1890) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>f</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> N<span style="text-decoration: overline">K</span></td><td>0.24 to 0.36</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>3–10 %</td></tr><tr><td>Γ<sub>3</sub> Λη</td><td></td></tr><tr><td>Γ<sub>4</sub> ΞK</td><td></td></tr><tr><td>Γ<sub>5</sub> Σ(1385)π</td><td>seen</td></tr><tr><td>Γ<sub>6</sub> Σ(1385)π, P-wave</td><td>(6.0 ±3.0) %</td></tr><tr><td>Γ<sub>7</sub> Σ(1385)π, F-wave</td><td>(4.0 ±2.0) %</td></tr><tr><td>Γ<sub>8</sub> N<span style="text-decoration: overline">K</span>*(892)</td><td>seen</td></tr><tr><td>Γ<sub>9</sub> N<span style="text-decoration: overline">K</span>*(892), S=1/2</td><td></td></tr><tr><td>Γ<sub>10</sub> N<span style="text-decoration: overline">K</span>*(892), S=1/2, P-wave</td><td></td></tr><tr><td>Γ<sub>11</sub> N<span style="text-decoration: overline">K</span>*(892), S=3/2, P-wave</td><td></td></tr><tr><td>Γ<sub>12</sub> N<span style="text-decoration: overline">K</span>*(892), S=3/2, F-wave</td><td></td></tr><tr><td>Γ<sub>13</sub> Λω</td><td></td></tr></tbody></table>

## Λ(1890) BRANCHING RATIOS

See “Sign conventions for resonance couplings” in the Note on Λ and Σ Resonances.

### Γ(N̄K)/Γ<sub>total</sub> Γ<sub>1</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.24 to 0.36 OUR ESTIMATE</td><td></td><td></td><td></td></tr><tr><td>0.30 ±0.06</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.37 ±0.03</td><td>ZHANG</td><td>13A</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.20 ±0.02</td><td>GOPAL</td><td>80</td><td>DPWA K̄N → K̄N</td></tr><tr><td>0.34 ±0.05</td><td>ALSTON-...</td><td>78</td><td>DPWA K̄N → K̄N</td></tr><tr><td>0.24 ±0.04</td><td>HEMINGWAY</td><td>75</td><td>DPWA K̄p → K̄N</td></tr></tbody></table>

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

<table><tbody><tr><td>0.305</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.18 ±0.02</td><td>GOPAL</td><td>77</td><td>DPWA See GOPAL 80</td></tr><tr><td>0.36 or 0.34</td><td>2 MARTIN</td><td>77</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

² The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

### Γ(Σπ)/Γ<sub>total</sub> Γ<sub>2</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>6 ±2</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td>&lt;0.03</td><td>LANGBEIN</td><td>72</td><td>IPWA K̄N multichannel</td></tr></tbody></table>

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

<table><tbody><tr><td>0.04</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Γ(Λη)/Γ<sub>total</sub> Γ<sub>3</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.012</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Γ(ΞK)/Γ<sub>total</sub> Γ<sub>4</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>~0.01</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

<table><tbody><tr><td>0.009</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Γ(Σ(1385)π, P-wave)/Γ<sub>total</sub> Γ<sub>6</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.06 ±0.03</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

<table><tbody><tr><td>0.453</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Γ(Σ(1385)π, F-wave)/Γ<sub>7</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.04 ±0.02</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

<table><tbody><tr><td>0.019</td><td>1 KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.
Γ(NK\* (892), S=1/2, P-wave)/Γ<sub>total</sub> Γ<sub>10</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;0.01</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

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

<table><tr><td>0.073</td><td>1 KAMANO</td><td>15</td><td>DPWA K N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Γ(NK\* (892), S=3/2, P-wave)/Γ<sub>total</sub> Γ<sub>11</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>~ 0.01</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

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

<table><tr><td>0.088</td><td>1 KAMANO</td><td>15</td><td>DPWA K N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Γ(NK\* (892), S=3/2, F-wave)/Γ<sub>total</sub> Γ<sub>12</sub>/Γ

<table><thead><tr><th>VALUE</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>0.001</td><td>1 KAMANO</td><td>15</td><td>DPWA K N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>−</sup>K → Λ(1890) → Σ<sup>π</sup> (Γ<sub>1</sub>Γ<sub>2</sub>)<sup>1/2</sup>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>−0.09 ± 0.02</td><td>ZHANG</td><td>13A</td><td>DPWA K N multichannel</td></tr><tr><td>−0.09 ± 0.03</td><td>GOPAL</td><td>77</td><td>DPWA K N multichannel</td></tr></tbody></table>

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

<table><tr><td>+0.15 or +0.14</td><td>1 MARTIN</td><td>77</td><td>DPWA K N multichannel</td></tr></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>−</sup>K → Λ(1890) → Σ(1385)<sup>π</sup>, P-wave (Γ<sub>1</sub>Γ<sub>6</sub>)<sup>1/2</sup>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;0.03</td><td>CAMERON</td><td>78</td><td>DPWA K p → Σ(1385) π</td></tr></tbody></table>

(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>−</sup>K → Λ(1890) → Σ(1385)<sup>π</sup>, F-wave (Γ<sub>1</sub>Γ<sub>7</sub>)<sup>1/2</sup>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>−0.31 ± 0.04</td><td>ZHANG</td><td>13A</td><td>DPWA K N multichannel</td></tr><tr><td>−0.126 ± 0.055</td><td>1 CAMERON</td><td>78</td><td>DPWA K p → Σ(1385) π</td></tr></tbody></table>

¹ The published sign has been changed to be in accord with the baryon-first convention.

(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>−</sup>K → Λ(1890) → NK\* (892), S=1/2 (Γ<sub>1</sub>Γ<sub>9</sub>)<sup>1/2</sup>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>−0.17 ± 0.05</td><td>ZHANG</td><td>13A</td><td>DPWA K N multichannel</td></tr><tr><td>−0.07 ± 0.03</td><td>1,2 CAMERON</td><td>78B</td><td>DPWA K p → NK\*</td></tr></tbody></table>

¹ Upper limits on the P<sub>3</sub> and F<sub>3</sub> waves are each 0.03.

² The published sign has been changed to be in accord with the baryon-first convention.

(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>−</sup>K → Λ(1890) → NK\* (892), S=3/2, F-wave (Γ<sub>1</sub>Γ<sub>12</sub>)<sup>1/2</sup>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>−0.11 ± 0.03</td><td>ZHANG</td><td>13A</td><td>DPWA K N multichannel</td></tr></tbody></table>

(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>−</sup>K → Λ(1890) → Λ<sup>ω</sup> (Γ<sub>1</sub>Γ<sub>13</sub>)<sup>1/2</sup>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>seen</td><td>BACCARI</td><td>77</td><td>IPWA K p → Λ<sup>ω</sup></td></tr><tr><td>0.032</td><td>1 NAKKASYAN</td><td>75</td><td>DPWA K p → Λ<sup>ω</sup></td></tr></tbody></table>

¹ Found in one of two best solutions.

Λ(1890) REFERENCES

<table><tr><td>SARANTSEV</td><td>19</td><td>EPJ A55 180</td><td>A.V. Sarantsev et al.</td><td>(BONN, PNPI)</td></tr><tr><td>KAMANO</td><td>15</td><td>PR C92 025205</td><td>H. Kamano et al.</td><td>(ANL, OSAK)</td></tr><tr><td>ZHANG</td><td>13A</td><td>PR C88 035205</td><td>H. Zhang et al.</td><td>(KSU)</td></tr><tr><td>PDG</td><td>82</td><td>PL 111B 1</td><td>M. Roos et al.</td><td>(HELS, CIT, CERN)</td></tr><tr><td>GOPAL</td><td>80</td><td>Toronto Conf. 159</td><td>G.P. Gopal</td><td>(RHEL)</td></tr><tr><td>ALSTON...</td><td>78</td><td>PR D18 182</td><td>M. Alston-Garnjost et al.</td><td>(LBL, MTHO+) IJP</td></tr><tr><td>Also</td><td></td><td>PRL 38 1007</td><td>M. Alston-Garnjost et al.</td><td>(LBL, MTHO+) IJP</td></tr><tr><td>CAMERON</td><td>78</td><td>NP B143 189</td><td>W. Cameron et al.</td><td>(RHEL, LOIC) IJP</td></tr><tr><td>CAMERON</td><td>78B</td><td>NP B146 327</td><td>W. Cameron et al.</td><td>(RHEL, LOIC) IJP</td></tr><tr><td>BACCARI</td><td>77</td><td>NC 41A 96</td><td>B. Baccari et al.</td><td>(SACL, CDEF) IJP</td></tr><tr><td>GOPAL</td><td>77</td><td>NP B119 362</td><td>G.P. Gopal et al.</td><td>(LOIC, RHEL) IJP</td></tr><tr><td>MARTIN</td><td>77</td><td>NP B127 349</td><td>B.R. Martin, M.K. Pidcock, R.G. Moorhouse</td><td>(LOUC+) IJP</td></tr><tr><td>Also</td><td></td><td>NP B126 266</td><td>B.R. Martin, M.K. Pidcock</td><td>(LOUC) IJP</td></tr><tr><td>Also</td><td></td><td>NP B126 285</td><td>B.R. Martin, M.K. Pidcock</td><td>(LOUC) IJP</td></tr><tr><td>HEMINGWAY</td><td>75</td><td>NP B91 12</td><td>R.J. Hemingway et al.</td><td>(CERN, HEIDH, MPIM) IJP</td></tr><tr><td>NAKKASYAN</td><td>75</td><td>NP B93 85</td><td>A. Nakkasyan</td><td>(CERN) IJP</td></tr><tr><td>LANGBEIN</td><td>72</td><td>NP B47 477</td><td>W. Langbein, F. Wagner</td><td>(MPIM) IJP</td></tr></table>

Λ(2000) 1/2<sup>−</sup>

$$I(J^P) = 0(\frac{1}{2}^-) \quad \text{Status: } *$$

OMITTED FROM SUMMARY TABLE

BARBARO-GALTIERI 70 (in Σπ) and BRANDSTETTER 72 (in Λω) proposed a state at about this mass. Those analyses are considered to be obsolete, see NAKKASYAN 75 and PDG 18.

Λ(2000) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>≈ 2000 OUR ESTIMATE</td><td></td><td></td><td></td></tr><tr><td>2020 ± 16</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>2030 ± 30</td><td>CAMERON</td><td>78B</td><td>DPWA K<sup>-</sup> p → NK\*</td></tr></tbody></table>

Λ(2000) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>255 ± 63</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>125 ± 25</td><td>CAMERON</td><td>78B</td><td>DPWA K<sup>-</sup> p → NK\*</td></tr></tbody></table>

Λ(2000) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>i</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> NK<sup>−</sup></td><td>(27 ± 6) %</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td></td></tr><tr><td>Γ<sub>3</sub> Λη</td><td>(16 ± 7) %</td></tr><tr><td>Γ<sub>4</sub> NK<sup>+</sup> (892), S=1/2, S-wave</td><td></td></tr><tr><td>Γ<sub>5</sub> NK<sup>+</sup> (892), S=3/2, D-wave</td><td></td></tr></tbody></table>

Λ(2000) BRANCHING RATIOS

See "Sign conventions for resonance couplings" in the Note on Λ and Σ Resonances.

Γ(NK\*)/Γ<sub>total</sub> Γ<sub>1</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.27 ± 0.06</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>−</sup>K → Λ(2000) → Σπ (Γ<sub>1</sub>Γ<sub>2</sub>)<sup>1/2</sup>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>−0.07 ± 0.03</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

Γ(Λη)/Γ<sub>total</sub> Γ<sub>3</sub>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.16 ± 0.07</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>−</sup>K → Λ(2000) → NK\* (892), S=1/2, S-wave (Γ<sub>1</sub>Γ<sub>4</sub>)<sup>1/2</sup>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>−0.12 ± 0.03</td><td>1 CAMERON</td><td>78B</td><td>DPWA K<sup>-</sup> p → NK\*</td></tr></tbody></table>

¹ The published sign has been changed to be in accord with the baryon-first convention.

(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>−</sup>K → Λ(2000) → NK\* (892), S=3/2, D-wave (Γ<sub>1</sub>Γ<sub>5</sub>)<sup>1/2</sup>/Γ

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>+0.34 ± 0.05</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>+0.09 ± 0.03</td><td>CAMERON</td><td>78B</td><td>DPWA K<sup>-</sup> p → NK\*</td></tr></tbody></table>

Λ(2000) REFERENCES

PDG 18 PR D98 030001
ZHANG 13A PR C88 035205
CAMERON 78B NP B146 327
NAKKASYAN 75 NP B93 85
BRANDSTETT 72 NP B39 13
BARBARO-... 70 Duke Conf. 173
Hyperon Resonances, 1970

M. Tanabashi et al. (PDG Collab.)
H. Zhang et al. (KSU)
W. Cameron et al. (RHEL, LOIC) IJP
A. Nakkasyan (CERN) IJP
A. A. Brandstetter et al. (RHEL, CDEF+) IJP
A. Barbaro-Galtieri (LRL) IJP

Λ(2050) 3/2<sup>−</sup>

$$I(J^P) = 0(\frac{3}{2}^-) \quad \text{Status: } *$$

OMITTED FROM SUMMARY TABLE

Λ(2050) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2056 ± 22</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>
Λ(2050) WIDTH

<table><thead><tr><th>VALUE (MeV)</th></tr></thead><tbody><tr><td>493 ± 61</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

Λ(2050) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>j</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> N<sup>KK</sup></td><td>(19 ± 4) %</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>(6.0 ± 3.0) %</td></tr><tr><td>Γ<sub>3</sub> Σ*(1385)π, S-wave</td><td>(8 ± 6) %</td></tr><tr><td>Γ<sub>4</sub> Σ*(1385)π, D-wave</td><td>(4.0 ± 3.0) %</td></tr><tr><td>Γ<sub>5</sub> N<sup>KK</sup>*(892), S=1/2</td><td>(23 ± 7) %</td></tr></tbody></table>

Λ(2050) BRANCHING RATIOS

<table><thead><tr><th>Γ(N<sup>KK</sup>)/Γ<sub>total</sub></th><th>Γ<sub>1</sub>/Γ</th></tr></thead><tbody><tr><td>0.19 ± 0.04</td><td></td></tr><tr><td>Γ(Σπ)/Γ<sub>total</sub></td><td>Γ<sub>2</sub>/Γ</td></tr><tr><td>0.06 ± 0.03</td><td></td></tr><tr><td>Γ(Σ*(1385)π, S-wave)/Γ<sub>total</sub></td><td>Γ<sub>3</sub>/Γ</td></tr><tr><td>0.08 ± 0.06</td><td></td></tr><tr><td>Γ(Σ*(1385)π, D-wave)/Γ<sub>total</sub></td><td>Γ<sub>4</sub>/Γ</td></tr><tr><td>0.04 ± 0.03</td><td></td></tr><tr><td>Γ(N<sup>KK</sup>*(892), S=1/2)/Γ<sub>total</sub></td><td>Γ<sub>5</sub>/Γ</td></tr><tr><td>0.23 ± 0.07</td><td></td></tr></tbody></table>

Λ(2050) REFERENCES

ZHANG 13A PR C88 035205

H. Zhang et al.

(KSU)

$$ \Lambda(2070) 3/2^+ $$

$$ J^P = \frac{3}{2}^+ $$

Status: *

OMITTED FROM SUMMARY TABLE

Λ(2070) POLE POSITION

REAL PART

<table><thead><tr><th>VALUE (MeV)</th></tr></thead><tbody><tr><td>2044 ± 20</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

-2×IMAGINARY PART

<table><thead><tr><th>VALUE (MeV)</th></tr></thead><tbody><tr><td>360 ± 45</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Λ(2070) POLE RESIDUES

Normalized residue in N<sup>KK</sup> → Λ(2070) → N<sup>KK</sup>

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.15 ± 0.05</td><td>-37 ± 10</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → Σπ

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.10 ± 0.03</td><td>-47 ± 8</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → ΞK

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.11 ± 0.03</td><td>0 ± 25</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → Λω, S=1/2, P-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.10 ± 0.04</td><td>150 ± 17</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → Λω, S=3/2, P-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.08 ± 0.04</td><td>20 ± 30</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → Λω, S=3/2, F-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.04 ± 0.02</td><td>-175 ± 35</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → Σ(1385)π, P-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.12 ± 0.07</td><td>-160 ± 55</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → Σ(1385)π, F-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.07 ± 0.04</td><td>-145 ± 50</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → N<sup>KK</sup>*(892), S=1/2, P-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.36 ± 0.07</td><td>-45 ± 30</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → N<sup>KK</sup>*(892), S=3/2, P-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.16 ± 0.05</td><td>150 ± 35</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in N<sup>KK</sup> → Λ(2070) → N<sup>KK</sup>*(892), S=3/2, F-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th></tr></thead><tbody><tr><td>0.14 ± 0.08</td><td>-50 ± 30</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Λ(2070) MASS

<table><thead><tr><th>VALUE (MeV)</th></tr></thead><tbody><tr><td>2070 ± 24</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Λ(2070) WIDTH

<table><thead><tr><th>VALUE (MeV)</th></tr></thead><tbody><tr><td>370 ± 50</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Λ(2070) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>j</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> N<sup>KK</sup></td><td>(12 ± 5) %</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>(7.0 ± 3.0) %</td></tr><tr><td>Γ<sub>3</sub> ΞK</td><td>(7.0 ± 3.0) %</td></tr><tr><td>Γ<sub>4</sub> Λω, S=1/2, P-wave</td><td>(7 ± 4) %</td></tr><tr><td>Γ<sub>5</sub> Λω, S=3/2, P-wave</td><td>(3.0 ± 2.0) %</td></tr><tr><td>Γ<sub>6</sub> Λω, S=3/2, F-wave</td><td>(1.0 ± 1.0) %</td></tr><tr><td>Γ<sub>7</sub> Σ(1385)π, P-wave</td><td>(10 ± 5) %</td></tr><tr><td>Γ<sub>8</sub> Σ(1385)π, F-wave</td><td>(2.0 ± 2.0) %</td></tr><tr><td>Γ<sub>9</sub> N<sup>KK</sup>*(892), S=1/2, P-wave</td><td>(42 ± 8) %</td></tr><tr><td>Γ<sub>10</sub> N<sup>KK</sup>*(892), S=3/2, P-wave</td><td>(14 ± 6) %</td></tr><tr><td>Γ<sub>11</sub> N<sup>KK</sup>*(892), S=3/2, F-wave</td><td>(10 ± 6) %</td></tr></tbody></table>

Λ(2070) BRANCHING RATIOS

<table><thead><tr><th>Γ(N<sup>KK</sup>)/Γ<sub>total</sub></th><th>Γ<sub>1</sub>/Γ</th></tr></thead><tbody><tr><td>0.12 ± 0.05</td><td></td></tr></tbody></table>

<table><thead><tr><th>Γ(Σπ)/Γ<sub>total</sub></th><th>Γ<sub>2</sub>/Γ</th></tr></thead><tbody><tr><td>0.07 ± 0.03</td><td></td></tr></tbody></table>

<table><thead><tr><th>Γ(ΞK)/Γ<sub>total</sub></th><th>Γ<sub>3</sub>/Γ</th></tr></thead><tbody><tr><td>0.07 ± 0.03</td><td></td></tr></tbody></table>

<table><thead><tr><th>Γ(Λω, S=1/2, P-wave)/Γ<sub>total</sub></th><th>Γ<sub>4</sub>/Γ</th></tr></thead><tbody><tr><td>0.07 ± 0.04</td><td></td></tr></tbody></table>

<table><thead><tr><th>Γ(Λω, S=3/2, P-wave)/Γ<sub>total</sub></th><th>Γ<sub>5</sub>/Γ</th></tr></thead><tbody><tr><td>0.03 ± 0.02</td><td></td></tr></tbody></table>

<table><thead><tr><th>Γ(Λω, S=3/2, F-wave)/Γ<sub>total</sub></th><th>Γ<sub>6</sub>/Γ</th></tr></thead><tbody><tr><td>0.01 ± 0.01</td><td></td></tr></tbody></table>

<table><thead><tr><th>Γ(Σ(1385)π, P-wave)/Γ<sub>total</sub></th><th>Γ<sub>7</sub>/Γ</th></tr></thead><tbody><tr><td>0.10 ± 0.05</td><td></td></tr></tbody></table>

<table><thead><tr><th>Γ(Σ(1385)π, F-wave)/Γ<sub>total</sub></th><th>Γ<sub>8</sub>/Γ</th></tr></thead><tbody><tr><td>0.02 ± 0.02</td><td></td></tr></tbody></table>

<table><thead><tr><th>Γ(N<sup>KK</sup>*(892), S=1/2, P-wave)/Γ<sub>total</sub></th><th>Γ<sub>9</sub>/Γ</th></tr></thead><tbody><tr><td>0.42 ± 0.08</td><td></td></tr></tbody></table>
$$ \Gamma(N\bar{K}^*(892), S=3/2, P-wave)/\Gamma_{\text{total}} \quad \Gamma_{10}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.14±0.06</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \Gamma(N\bar{K}^*(892), S=3/2, F-wave)/\Gamma_{\text{total}} \quad \Gamma_{11}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.10±0.06</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

### Λ(2070) REFERENCES

SARANTSEV 19 EPJ A55 180 A.V. Sarantsev et al. (BONN, PNPI)

$$ \Lambda(2080) 5/2^{-} $$

$$ J^P = \frac{5}{2}^{-} \quad \text{Status: } * $$

OMITTED FROM SUMMARY TABLE

### Λ(2080) POLE POSITION

#### REAL PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2070±15</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

#### -2×IMAGINARY PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>172±26</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

### Λ(2080) POLE RESIDUES

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2080) \to N\bar{K} $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.12±0.03</td><td>-35 ± 22</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2080) \to \Sigma\pi $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.07±0.03</td><td>11 ± 16</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2080) \to \Xi K $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.06±0.02</td><td>115 ± 20</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2080) \to \Lambda\omega, S=1/2, D-wave $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.06±0.03</td><td>115 ± 25</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2080) \to \Lambda\omega, S=3/2, D-wave $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.09±0.03</td><td>-10 ± 35</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2080) \to \Sigma(1385)\pi, D-wave $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.14±0.04</td><td>155 ± 45</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2080) \to \Sigma(1385)\pi, G-wave $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.05±0.03</td><td>30 ± 45</td><td>SARANTSEV 19</td><td>K N multichannel</td><td></td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2080) \to N\bar{K}^*(892), S=1/2, D-wave $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.16±0.08</td><td>-120 ± 50</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2080) \to N\bar{K}^*(892), S=3/2, D-wave $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.20±0.14</td><td>60 ± 50</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

### Λ(2080) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2082±13</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

### Λ(2080) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>181±29</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

### Λ(2080) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>j</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> N<span style="text-decoration: overline">K</span></td><td>(11.0 ± 3.0) %</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>( 5.0 ± 2.0) %</td></tr><tr><td>Γ<sub>3</sub> ΞK</td><td>( 4.0 ± 1.0) %</td></tr><tr><td>Γ<sub>4</sub> Λω, S=1/2, D-wave</td><td>( 4.0 ± 2.0) %</td></tr></tbody></table>

<table><tbody><tr><td>Γ<sub>5</sub> Λω, S=3/2, D-wave</td><td>( 8.0 ± 3.0) %</td></tr><tr><td>Γ<sub>6</sub> Σ(1385)π, D-wave</td><td>( 15 ± 5) %</td></tr><tr><td>Γ<sub>7</sub> Σ(1385)π, G-wave</td><td>( 3.0 ± 2.0) %</td></tr><tr><td>Γ<sub>8</sub> N<span style="text-decoration: overline">K</span>*(892), S=1/2, D-wave</td><td>( 17 ± 9) %</td></tr><tr><td>Γ<sub>9</sub> N<span style="text-decoration: overline">K</span>*(892), S=3/2, D-wave</td><td>( 25 ± 16) %</td></tr></tbody></table>

### Λ(2080) BRANCHING RATIOS

$$ \Gamma(N\bar{K})/\Gamma_{\text{total}} \quad \Gamma_{1}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.11±0.03</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \Gamma(\Sigma\pi)/\Gamma_{\text{total}} \quad \Gamma_{2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.05±0.02</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \Gamma(\Xi K)/\Gamma_{\text{total}} \quad \Gamma_{3}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.04±0.01</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \Gamma(\Lambda\omega, S=1/2, D-wave)/\Gamma_{\text{total}} \quad \Gamma_{4}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.04±0.02</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \Gamma(\Lambda\omega, S=3/2, D-wave)/\Gamma_{\text{total}} \quad \Gamma_{5}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.08±0.03</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \Gamma(\Sigma(1385)\pi, D-wave)/\Gamma_{\text{total}} \quad \Gamma_{6}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.15±0.05</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \Gamma(\Sigma(1385)\pi, G-wave)/\Gamma_{\text{total}} \quad \Gamma_{7}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.03±0.02</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \Gamma(N\bar{K}^*(892), S=1/2, D-wave)/\Gamma_{\text{total}} \quad \Gamma_{8}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.17±0.09</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

$$ \Gamma(N\bar{K}^*(892), S=3/2, D-wave)/\Gamma_{\text{total}} \quad \Gamma_{9}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.25±0.16</td><td>SARANTSEV 19</td><td>DPWA</td><td>K N multichannel</td></tr></tbody></table>

### Λ(2080) REFERENCES

SARANTSEV 19 EPJ A55 180 A.V. Sarantsev et al. (BONN, PNPI)

$$ \Lambda(2085) 7/2^{+} $$

$$ I(J^P) = 0(\frac{1}{2}^+) \quad \text{Status: } ** $$

OMITTED FROM SUMMARY TABLE

was Λ(2020)

In LITCHFIELD 71, need for the state rests solely on a possibly inconsistent polarization measurement at 1.784 GeV/c. HEMING-WAY 75 does not require this state. GOPAL 77 does not need it in either N<span style="text-decoration: overline">K</span> or Σπ. With new K<sup>-</sup> n angular distributions included, DECLAIS 77 sees it. However, this and other new data are included in GOPAL 80 and the state is not required. BACCARI 77 weakly supports it.

### Λ(2085) POLE POSITION

#### REAL PART

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1757</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15. Solution B reports M = 2041<sup>+80</sup><sub>-82</sub> MeV.

#### -2×IMAGINARY PART

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

¹ KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15. Solution B reports M = 238<sup>+114</sup><sub>-34</sub> MeV.

### Λ(2085) POLE RESIDUES

The normalized residue is the residue divided by Γ<sub>pole</sub>/2.

$$ \text{Normalized residue in } N\bar{K} \to \Lambda(2085) \to N\bar{K} $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody></tbody></table>

0.000145 -77 1 KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.
Normalized residue in $N\bar{K} \to \Lambda(2085) \to \Sigma\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</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>0.0112</td><td>120</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(2085) \to \Lambda\eta$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</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>0.000786</td><td>-100</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(2085) \to \Sigma(1385)\pi$, F-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</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>0.00451</td><td>-82</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(2085) \to \Sigma(1385)\pi$, H-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</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>0.0000298</td><td>-128</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Λ(2085) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">≈ 2020 OUR ESTIMATE</td></tr><tr><td>2043 ± 22</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>2140</td><td>BACCARI</td><td>77</td><td>DPWA K<sup>-</sup> p → Λω</td></tr><tr><td>2117</td><td>DECLAIS</td><td>77</td><td>DPWA K<sup>-</sup> N → K<sup>-</sup> N</td></tr><tr><td>2100 ± 30</td><td>LITCHFIELD</td><td>71</td><td>DPWA K<sup>-</sup> p → K<sup>-</sup> N</td></tr><tr><td>2020 ± 20</td><td>BARBARO-...</td><td>70</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr></tbody></table>

Λ(2085) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>200 ± 75</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>128</td><td>BACCARI</td><td>77</td><td>DPWA K<sup>-</sup> p → Λω</td></tr><tr><td>167</td><td>DECLAIS</td><td>77</td><td>DPWA K<sup>-</sup> N → K<sup>-</sup> N</td></tr><tr><td>120 ± 30</td><td>LITCHFIELD</td><td>71</td><td>DPWA K<sup>-</sup> p → K<sup>-</sup> N</td></tr><tr><td>160 ± 30</td><td>BARBARO-...</td><td>70</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr></tbody></table>

Λ(2085) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>i</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> N<span style="text-decoration: overline">K</span></td><td></td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td></td></tr><tr><td>Γ<sub>3</sub> Λη</td><td></td></tr><tr><td>Γ<sub>4</sub> Σ(1385)π, F-wave</td><td></td></tr><tr><td>Γ<sub>5</sub> Σ(1385)π, H-wave</td><td></td></tr><tr><td>Γ<sub>6</sub> N<span style="text-decoration: overline">K</span>* (892), S=1/2</td><td>(30 ± 9) %</td></tr><tr><td>Γ<sub>7</sub> N<span style="text-decoration: overline">K</span>* (892), S=1/2, F-wave</td><td></td></tr><tr><td>Γ<sub>8</sub> N<span style="text-decoration: overline">K</span>* (892), S=3/2, F-wave</td><td></td></tr><tr><td>Γ<sub>9</sub> N<span style="text-decoration: overline">K</span>* (892), S=3/2, H-wave</td><td></td></tr><tr><td>Γ<sub>10</sub> Λω</td><td></td></tr></tbody></table>

Λ(2085) BRANCHING RATIOS

See “Sign conventions for resonance couplings” in the Note on Λ and Σ Resonances.

$\Gamma(N\bar{K})/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.028 ± 0.005</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>0.05</td><td>DECLAIS</td><td>77</td><td>DPWA K<sup>-</sup> N → K<sup>-</sup> N</td></tr><tr><td>0.05 ± 0.02</td><td>LITCHFIELD</td><td>71</td><td>DPWA K<sup>-</sup> p → K<sup>-</sup> N</td></tr></tbody></table>

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

<table><tr><td>not seen</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$\Gamma(\Sigma\pi)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</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>0.891</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

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

<table><thead><tr><th>VALUE</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>0.002</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$\Gamma(\Sigma(1385)\pi, F-wave)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</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>0.105</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$\Gamma(\Sigma(1385)\pi, H-wave)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</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>not seen</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$\Gamma(N\bar{K}^*(892), S=1/2, F-wave)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</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>not seen</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$\Gamma(N\bar{K}^*(892), S=3/2, F-wave)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</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>0.001</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$\Gamma(N\bar{K}^*(892), S=3/2, H-wave)/\Gamma_{\text{total}}$

<table><thead><tr><th>VALUE</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>not seen</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$\Gamma(N\bar{K}^*(892), S=1/2)/\Gamma_{\text{total}}$

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

<table><tr><td>0.30 ± 0.09</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></table>

$\Gamma(\Gamma_1\Gamma_2)^{1/2}/\Gamma_{\text{total}}$ in $N\bar{K} \to \Lambda(2085) \to \Sigma\pi$

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

<table><tr><td>+0.02 ± 0.01</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></table>

<table><tr><td>-0.15 ± 0.02</td><td>BARBARO-...</td><td>70</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr></table>

$\Gamma(\Gamma_1\Gamma_2)^{1/2}/\Gamma_{\text{total}}$ in $N\bar{K} \to \Lambda(2085) \to \Lambda\omega$

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

<table><tr><td>&lt;0.05</td><td>BACCARI</td><td>77</td><td>DPWA K<sup>-</sup> p → Λω</td></tr></table>

Λ(2085) REFERENCES

<table><tr><td>KAMANO</td><td>15</td><td>PR C92 025205</td><td>H. Kamano et al.</td><td>(ANL, OSAK)</td></tr><tr><td>ZHANG</td><td>13A</td><td>PR C88 035205</td><td>H. Zhang et al.</td><td>(KSU)</td></tr><tr><td>GOPAL</td><td>80</td><td>Toronto Conf. 159</td><td>G.P. Gopal</td><td>(RHEL)</td></tr><tr><td>BACCARI</td><td>77</td><td>NC 41A 96</td><td>B. Baccari et al.</td><td>(SACL, CDEF) UP</td></tr><tr><td>DECLAIS</td><td>77</td><td>CERN 77-16</td><td>Y. Declais et al.</td><td>(CAEN, CERN) UP</td></tr><tr><td>GOPAL</td><td>77</td><td>NP B119 362</td><td>G.P. Gopal et al.</td><td>(LOIC, RHEL)</td></tr><tr><td>HEMINGWAY</td><td>75</td><td>NP B91 12</td><td>R.J. Hemingway et al.</td><td>(CERN, HEIDH, MPIM) UP</td></tr><tr><td>LITCHFIELD</td><td>71</td><td>NP B30 125</td><td>P.J. Litchfield et al.</td><td>(RHEL, CDEF, SACL) UP</td></tr><tr><td>BARBARO-...</td><td>70</td><td>Duke Conf. 173</td><td>A. Barbaro-Galtieri</td><td>(LRL) UP</td></tr></table>

$\Lambda(2100) 7/2^-$

$I(J^P) = 0(\frac{J}{2}^P)$ Status: ***

Most of the results published before 1973 are now obsolete and have been omitted. They may be found in our 1982 edition Physics Letters **111B** 1 (1982).

This entry only includes results from partial-wave analyses. Parameters of peaks seen in cross sections and in invariant-mass distributions around 2100 MeV used to be listed in a separate entry immediately following. It may be found in our 1986 edition Physics Letters **170B** 1 (1986).

Λ(2100) POLE POSITION

REAL PART
VALUE (MeV)
2040 ± 14
DOCUMENT ID
SARANTSEV 19
TECN
DPWA K<sup>-</sup> N multichannel

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

<table><tr><td>2023</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></table>
## −2×IMAGINARY PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>215±29</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>239</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

## Λ(2100) POLE RESIDUE

The “normalized residue” is the residue divided by $\Gamma_{pole}/2$.

### Normalized residue in $N\bar{K} \to \Lambda(2100) \to N\bar{K}$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.28±0.06</td><td>-40±10</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

### Normalized residue in $N\bar{K} \to \Lambda(2100) \to \Sigma\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.09±0.02</td><td>-35±15</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

### Normalized residue in $N\bar{K} \to \Lambda(2100) \to \Sigma(1385)\pi, D$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.04±0.03</td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

### Normalized residue in $N\bar{K} \to \Lambda(2100) \to \Sigma(1385)\pi, G$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.06±0.03</td><td>-45±15</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

### Normalized residue in $N\bar{K} \to \Lambda(2100) \to N\bar{K}^*(892), S=3/2, D$-wave

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.11±0.06</td><td>-30±30</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

## Λ(2100) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>2090 to 2110 (≈ 2100) OUR ESTIMATE</strong></td></tr><tr><td>2090±15</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>2086±6</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>2104±10</td><td>GOPAL</td><td>80</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>2106±30</td><td>DEBELLEFON</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>2110±10</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>2105±10</td><td>HEMINGWAY</td><td>75</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>2115±10</td><td>KANE</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Σπ</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>2094</td><td>BACCARI</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Λω</td></tr><tr><td>2094</td><td>DECLAIS</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>2110 or 2089</td><td><sup>1</sup>NAKKASYAN</td><td>75</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Λω</td></tr></tbody></table>

## Λ(2100) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>100 to 250 (≈ 200) OUR ESTIMATE</strong></td></tr><tr><td>290±30</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>305±16</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>157±40</td><td>DEBELLEFON</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>250±30</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>241±30</td><td>HEMINGWAY</td><td>75</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>152±15</td><td>KANE</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Σπ</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>98</td><td>BACCARI</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Λω</td></tr><tr><td>250</td><td>DECLAIS</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>244 or 302</td><td><sup>1</sup>NAKKASYAN</td><td>75</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Λω</td></tr></tbody></table>

## Λ(2100) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>i</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> N<span style="text-decoration: overline;">K</span></td><td>25–35 %</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>~5 %</td></tr><tr><td>Γ<sub>3</sub> Λη</td><td>&lt;3 %</td></tr><tr><td>Γ<sub>4</sub> ΞK</td><td>&lt;3 %</td></tr><tr><td>Γ<sub>5</sub> Λω</td><td>&lt;8 %</td></tr><tr><td>Γ<sub>6</sub> Σ(1385)π, D-wave</td><td></td></tr><tr><td>Γ<sub>7</sub> Σ(1385)π, G-wave</td><td>(1.0±1.0) %</td></tr><tr><td>Γ<sub>8</sub> N<span style="text-decoration: overline;">K</span>* (892)</td><td>10–20 %</td></tr><tr><td>Γ<sub>9</sub> N<span style="text-decoration: overline;">K</span>* (892), S=3/2, D-wave</td><td>(4.0±2.0) %</td></tr><tr><td>Γ<sub>10</sub> N<span style="text-decoration: overline;">K</span>* (892), S=1/2, G-wave</td><td></td></tr><tr><td>Γ<sub>11</sub> N<span style="text-decoration: overline;">K</span>* (892), S=3/2, G-wave</td><td></td></tr></tbody></table>

## Λ(2100) BRANCHING RATIOS

See “Sign conventions for resonance couplings” in the Note on Λ and Σ Resonances.

<table><thead><tr><th>Γ(N<span style="text-decoration: overline;">K</span>)/Γ<sub>total</sub></th><th>Γ<sub>1</sub>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>0.25 to 0.35 (≈ 0.30) OUR ESTIMATE</strong></td></tr><tr><td>0.24±0.05</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>0.23±0.01</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>0.34±0.03</td><td>GOPAL</td><td>80</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>0.24±0.06</td><td>DEBELLEFON</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>0.31±0.03</td><td>HEMINGWAY</td><td>75</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.29</td><td>DECLAIS</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>0.30±0.03</td><td>GOPAL</td><td>77</td><td>DPWA See GOPAL 80</td></tr></tbody></table>

<table><thead><tr><th>Γ(Σπ)/Γ<sub>total</sub></th><th>Γ<sub>2</sub>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.030±0.015</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table><table><thead><tr><th>Γ(Σ(1385)π, D-wave)/Γ<sub>total</sub></th><th>Γ<sub>6</sub>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;0.01</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table><table><thead><tr><th>Γ(Σ(1385)π, G-wave)/Γ<sub>total</sub></th><th>Γ<sub>7</sub>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.01±0.01</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

<table><thead><tr><th>Γ(N<span style="text-decoration: overline;">K</span>* (892), S=3/2, D-wave)/Γ<sub>total</sub></th><th>Γ<sub>9</sub>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.04±0.02</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

<table><thead><tr><th>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → Λ(2100) → Σπ</th><th>(Γ<sub>1</sub>Γ<sub>2</sub>)<sup>1/2</sup>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>+0.03±0.01</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>+0.12±0.04</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>+0.11±0.01</td><td>KANE</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Σπ</td></tr></tbody></table>

<table><thead><tr><th>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → Λη</th><th>(Γ<sub>1</sub>Γ<sub>3</sub>)<sup>1/2</sup>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.050±0.020</td><td>RADER</td><td>73</td><td>MPWA <span style="text-decoration: overline;">K</span>−p → Λη</td></tr></tbody></table>

<table><thead><tr><th>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → ΞK</th><th>(Γ<sub>1</sub>Γ<sub>4</sub>)<sup>1/2</sup>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.035±0.018</td><td>LITCHFIELD</td><td>71</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → ΞK</td></tr></tbody></table>

<table><thead><tr><th colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</th></tr><tr><th>0.003</th><th>MULLER</th><th>69B</th><th>DPWA <span style="text-decoration: overline;">K</span>−p → ΞK</th></tr><tr><th>0.05</th><th>TRIPP</th><th>67</th><th>RVUE <span style="text-decoration: overline;">K</span>−p → ΞK</th></tr></thead></table>

<table><thead><tr><th>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → Λω</th><th>(Γ<sub>1</sub>Γ<sub>5</sub>)<sup>1/2</sup>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.070</td><td><sup>2</sup>BACCARI</td><td>77</td><td>DPWA <span style="text-decoration: overline;">G</span><sub>37</sub> wave</td></tr><tr><td>+0.011</td><td><sup>2</sup>BACCARI</td><td>77</td><td>DPWA <span style="text-decoration: overline;">G</span><sub>17</sub> wave</td></tr><tr><td>+0.008</td><td><sup>2</sup>BACCARI</td><td>77</td><td>DPWA <span style="text-decoration: overline;">G</span><sub>37</sub> wave</td></tr><tr><td>0.122 or 0.154</td><td><sup>1</sup>NAKKASYAN</td><td>75</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Λω</td></tr></tbody></table>

<table><thead><tr><th>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → N<span style="text-decoration: overline;">K</span>* (892), S=3/2, D-wave (Γ<sub>1</sub>Γ<sub>9</sub>)<sup>1/2</sup>/Γ</th><th>Γ<sub>1</sub>Γ<sub>10</sub>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>+0.16±0.02</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>+0.21±0.04</td><td>CAMERON</td><td>78B</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → N<span style="text-decoration: overline;">K</span>*</td></tr></tbody></table>

<table><thead><tr><th>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → N<span style="text-decoration: overline;">K</span>* (892), S=1/2, G-wave</th><th>(Γ<sub>1</sub>Γ<sub>10</sub>)<sup>1/2</sup>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.03±0.02</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.04±0.03</td><td><sup>3</sup>CAMERON</td><td>78B</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → N<span style="text-decoration: overline;">K</span>*</td></tr></tbody></table>

<table><thead><tr><th>(Γ<sub>i</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → N<span style="text-decoration: overline;">K</span>* (892), S=3/2, G-wave</th><th>(Γ<sub>1</sub>Γ<sub>11</sub>)<sup>1/2</sup>/Γ</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>+0.08±0.02</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

## Λ(2100) FOOTNOTES

<footnote n="1">1 The NAKKASYAN 75 values are from the two best solutions found. Each has the Λ(2100) and one additional resonance (P<sub>3</sub> or F<sub>5</sub>).</footnote>

<footnote n="2">2 Note that the three for BACCARI 77 entries are for three different waves.</footnote>

<footnote n="3">3 The published sign has been changed to be in accord with the baryon-first convention. The upper limit on the G<sub>3</sub> wave is 0.03.</footnote>
Λ(2100) REFERENCES

<table><tr><td>SARANTSEV</td><td>19</td><td>EPJ A55 180</td><td>A.V. Sarantsev et al.</td><td></td><td>(BONN, PNPI)</td></tr><tr><td>ZHANG</td><td>13A</td><td>PR C88 035205</td><td>H. Zhang et al.</td><td></td><td>(KSU)</td></tr><tr><td>PDG</td><td>86</td><td>PL 170B 1</td><td>M. Aguilar-Benitez et al.</td><td></td><td>(CERN, CIT+)</td></tr><tr><td>PDG</td><td>82</td><td>PL 111B 1</td><td>M. Roos et al.</td><td></td><td>(HELS, CIT, CERN)</td></tr><tr><td>GOPAL</td><td>80</td><td>Toronto Conf. 159</td><td>G.P. Gopal</td><td></td><td>(RHEL) IJP</td></tr><tr><td>CAMERON</td><td>78B</td><td>NP B146 327</td><td>W. Cameron et al.</td><td></td><td>(RHEL, LOIC) IJP</td></tr><tr><td>DEBELLEFON</td><td>78</td><td>NC 42A 403</td><td>A. de Bellefon et al.</td><td></td><td>(CDEF, SACL) UP</td></tr><tr><td>BACCARI</td><td>77</td><td>NC 41A 96</td><td>B. Baccari et al.</td><td></td><td>(SACL, CDEF) IJP</td></tr><tr><td>DECLAIS</td><td>77</td><td>CERN 77-16</td><td>Y. Declais et al.</td><td></td><td>(CAEN, CERN) IJP</td></tr><tr><td>GOPAL</td><td>77</td><td>NP B119 362</td><td>G.P. Gopal et al.</td><td></td><td>(LOIC, RHEL) IJP</td></tr><tr><td>HEMINGWAY</td><td>75</td><td>NP B91 12</td><td>R.J. Hemingway et al.</td><td></td><td>(CERN, HEIDH, MPIM) IJP</td></tr><tr><td>NAKKASYAN</td><td>75</td><td>NP B93 85</td><td>A. Nakkasyan</td><td></td><td>(CERN) IJP</td></tr><tr><td>KANE</td><td>74</td><td>LBL 2452</td><td>D.F. Kane</td><td></td><td>(LBL) IJP</td></tr><tr><td>RADER</td><td>73</td><td>NC 16A 178</td><td>R.K. Rader et al.</td><td></td><td>(SACL, HEID, CERN+)</td></tr><tr><td>LITCHFIELD</td><td>71</td><td>NP B30 125</td><td>P.J. Litchfield et al.</td><td></td><td>(RHEL, CDEF, SACL) IJP</td></tr><tr><td>MULLER</td><td>69B</td><td>Thesis UCRL 19372</td><td>R.A. Muller</td><td></td><td>(LRL)</td></tr><tr><td>TRIPP</td><td>67</td><td>NP B3 10</td><td>R.D. Tripp et al.</td><td></td><td>(LRL, SLAC, CERN+)</td></tr></table>

$$ \Lambda(2110) 5/2^+ $$

$$ I(J^P) = 0(\frac{5}{2}^+) \text{ Status: } \*\*\* $$

For results published before 1974 (they are now obsolete), see our 1982 edition Physics Letters **111B** 1 (1982). All the references have been retained.

This resonance is in the Baryon Summary Table, but the evidence for it could be better.

Λ(2110) POLE POSITION

REAL PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>2048 ± 10</strong></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>• • •</td><td colspan="3">We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1970</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

-2×IMAGINARY PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>255 ± 20</strong></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>• • •</td><td colspan="3">We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>350</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

Λ(2110) POLE RESIDUE

The “normalized residue” is the residue divided by $\Gamma_{pole}/2$.

$$ \text{Normalized residue in } N\bar{K} \rightarrow \Lambda(2110) \rightarrow N\bar{K} $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.020 ± 0.005</strong></td><td><strong>5 ± 15</strong></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \rightarrow \Lambda(2110) \rightarrow \Sigma\pi $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.13 ± 0.03</strong></td><td><strong>0 ± 15</strong></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \rightarrow \Lambda(2110) \rightarrow \Xi K $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.005 ± 0.005</strong></td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \rightarrow \Lambda(2110) \rightarrow \Lambda\omega, S=1/2, P\text{-wave} $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.01 ± 0.01</strong></td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \rightarrow \Lambda(2110) \rightarrow \Lambda\omega, S=3/2, P\text{-wave} $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.03 ± 0.01</strong></td><td><strong>-7 ± 16</strong></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

$$ \text{Normalized residue in } N\bar{K} \rightarrow \Lambda(2110) \rightarrow \Lambda\omega, S=3/2, F\text{-wave} $$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.01 ± 0.01</strong></td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr></tbody></table>

Λ(2110) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>2050 to 2130 (≈ 2090) OUR ESTIMATE</strong></td></tr><tr><td>2086 ± 12</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>2036 ± 13</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>2092 ± 25</td><td>GOPAL</td><td>80</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>2125 ± 25</td><td>CAMERON</td><td>78B</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → <span style="text-decoration: overline;">N</span><span style="text-decoration: overline;">K</span>*</td></tr><tr><td>2106 ± 50</td><td>DEBELLEFON</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>2140 ± 20</td><td>DEBELLEFON</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Σπ</td></tr><tr><td>2100 ± 50</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>2112 ± 7</td><td>KANE</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span>−p → Σπ</td></tr></tbody></table>

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

2137 BACCARI 77 DPWA $K^-p \rightarrow \Lambda\omega$

2103 ¹ NAKKASYAN 75 DPWA $K^-p \rightarrow \Lambda\omega$

Λ(2110) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>200 to 300 (≈ 250) OUR ESTIMATE</strong></td></tr><tr><td>274 ± 25</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>400 ± 38</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>245 ± 25</td><td>GOPAL</td><td>80</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>160 ± 30</td><td>CAMERON</td><td>78B</td><td>DPWA $K^-p \rightarrow N\bar{K}^*$</td></tr><tr><td>251 ± 50</td><td>DEBELLEFON</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>140 ± 20</td><td>DEBELLEFON</td><td>77</td><td>DPWA $K^-p \rightarrow \Sigma\pi$</td></tr><tr><td>200 ± 50</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>190 ± 30</td><td>KANE</td><td>74</td><td>DPWA $K^-p \rightarrow \Sigma\pi$</td></tr></tbody></table>

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

132 BACCARI 77 DPWA $K^-p \rightarrow \Lambda\omega$

391 ¹ NAKKASYAN 75 DPWA $K^-p \rightarrow \Lambda\omega$

Λ(2110) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>i</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub></td><td>5–25 %</td></tr><tr><td>Γ<sub>2</sub></td><td>10–40 %</td></tr><tr><td>Γ<sub>3</sub></td><td>seen</td></tr><tr><td>Γ<sub>4</sub></td><td>Λω, S=1/2, P-wave</td></tr><tr><td>Γ<sub>5</sub></td><td>Λω, S=3/2, P-wave</td></tr><tr><td>Γ<sub>6</sub></td><td>Λω, S=3/2, F-wave</td></tr><tr><td>Γ<sub>7</sub></td><td>ΞK</td></tr><tr><td>Γ<sub>8</sub></td><td>Σ(1385)π, seen</td></tr><tr><td>Γ<sub>9</sub></td><td>Σ(1385)π, P-wave</td></tr><tr><td>Γ<sub>10</sub></td><td>N<span style="text-decoration: overline;">K</span>*</td></tr><tr><td>Γ<sub>11</sub></td><td>N<span style="text-decoration: overline;">K</span>*(892), S=1/2</td></tr><tr><td>Γ<sub>12</sub></td><td>N<span style="text-decoration: overline;">K</span>*(892), S=3/2, P-wave</td></tr></tbody></table>

Λ(2110) BRANCHING RATIOS

See “Sign conventions for resonance couplings” in the Note on Λ and Σ Resonances.

<table><thead><tr><th>Γ(N<span style="text-decoration: overline;">K</span>)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>0.05 to 0.25 OUR ESTIMATE</strong></td></tr><tr><td>0.020 ± 0.005</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>0.083 ± 0.005</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline;">K</span>N multichannel</td></tr><tr><td>0.07 ± 0.03</td><td>GOPAL</td><td>80</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr><tr><td>0.27 ± 0.06</td><td>² DEBELLEFON</td><td>78</td><td>DPWA <span style="text-decoration: overline;">K</span>N → <span style="text-decoration: overline;">K</span>N</td></tr></tbody></table>

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

0.07 ± 0.03 GOPAL 77 DPWA See GOPAL 80

<table><thead><tr><th>Γ(Σπ)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>0.88 ± 0.20</strong></td></tr><tr><td colspan="4"><strong>Γ(Λω, S=1/2, P-wave)/Γ<sub>total</sub></strong></td></tr><tr><td colspan="4"><strong>&lt;0.01</strong></td></tr><tr><td colspan="4"><strong>Γ(Λω, S=3/2, P-wave)/Γ<sub>total</sub></strong></td></tr><tr><td colspan="4"><strong>0.05 ± 0.02</strong></td></tr><tr><td colspan="4"><strong>Γ(Λω, S=3/2, F-wave)/Γ<sub>total</sub></strong></td></tr><tr><td colspan="4"><strong>&lt;0.01</strong></td></tr></tbody></table>

<table><thead><tr><th>Γ(Λω, S=3/2, P-wave)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>0.05 ± 0.02</strong></td></tr><tr><td colspan="4"><strong>Γ(Λω, S=3/2, F-wave)/Γ<sub>total</sub></strong></td></tr><tr><td colspan="4"><strong>&lt;0.01</strong></td></tr></tbody></table>

<table><thead><tr><th>Γ(ΞK)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>~ 0</strong></td></tr><tr><td colspan="4"><strong>(Γ<sub>i</sub>Γ<sub>j</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → Λ(2110) → Σπ</strong></td></tr></tbody></table>

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>+0.04 ± 0.01</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>+0.14 ± 0.01</td><td>DEBELLEFON</td><td>77</td><td>DPWA $K^-p \rightarrow \Sigma\pi$</td></tr><tr><td>+0.20 ± 0.03</td><td>KANE</td><td>74</td><td>DPWA $K^-p \rightarrow \Sigma\pi$</td></tr></tbody></table>

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

+0.10 ± 0.03 GOPAL 77 DPWA <span style="text-decoration: overline;">K</span>N multichannel

<table><thead><tr><th>Γ<sub>i</sub>Γ<sub>j</sub><sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → Λ<sub>ω</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>&lt;0.05</strong></td></tr><tr><td colspan="4"><strong>0.112</strong></td></tr><tr><td colspan="4"><strong>(Γ<sub>i</sub>Γ<sub>j</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<span style="text-decoration: overline;">K</span> → Λ<sub>ω</sub></strong></td></tr><tr><td colspan="4"><strong>1 NAKKASYAN 75</strong></td></tr><tr><td colspan="4"><strong>DPWA K<sup>-</sup>p → Λ<sub>ω</sub></strong></td></tr></tbody></table>
<table><thead><tr><th colspan="3">(Γ<sub>1</sub>Γ<sub>3</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>3</sup>R → Λ(2110) → Σ(1385)π, P-wave</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td>+0.04 ± 0.01</td><td>ZHANG</td><td>13A DPWA Multichannel</td></tr><tr><td>+0.071 ± 0.025</td><td><sup>3</sup> CAMERON</td><td>78 DPWA K<sup>-</sup> p → Σ(1385)π</td></tr></tbody></table>

<table><thead><tr><th colspan="3">(Γ<sub>1</sub>Γ<sub>3</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>3</sup>R → Λ(2110) → N<sup>3</sup>R<sup>*</sup>(892), S=1/2</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td>-0.09 ± 0.01</td><td>ZHANG</td><td>13A DPWA Multichannel</td></tr><tr><td>-0.17 ± 0.04</td><td><sup>4</sup> CAMERON</td><td>78B DPWA K<sup>-</sup> p → N<sup>3</sup>R<sup>*</sup></td></tr></tbody></table>

<table><thead><tr><th colspan="3">(Γ<sub>1</sub>Γ<sub>3</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>3</sup>R → Λ(2110) → N<sup>3</sup>R<sup>*</sup>(892), S=3/2, P-wave</th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td>0.24 ± 0.01</td><td>ZHANG</td><td>13A DPWA Multichannel</td></tr></tbody></table>

### Λ(2110) FOOTNOTES

¹Found in one of two best solutions.

²The published error of 0.6 was a misprint.

³The CAMERON 78 upper limit on F-wave decay is 0.03. The sign here has been changed to be in accord with the baryon-first convention.

⁴The published sign has been changed to be in accord with the baryon-first convention. The CAMERON 78B upper limits on the P₃ and F₃ waves are each 0.03.

### Λ(2110) REFERENCES

<table><tr><td>SARANTSEV</td><td>19</td><td>EPJ A55 180</td><td>A.V. Sarantsev et al. (BONN, PNPI)</td></tr><tr><td>ZHANG</td><td>13A</td><td>PR C88 035205</td><td>H. Zhang et al. (KSU)</td></tr><tr><td>PDG</td><td>82</td><td>PL 111B 1</td><td>M. Roos et al. (HELS, CIT, CERN)</td></tr><tr><td>GOPAL</td><td>80</td><td>Toronto Conf. 159</td><td>G.P. Gopal (RHEL) IJP</td></tr><tr><td>CAMERON</td><td>78</td><td>NP B143 189</td><td>W. Cameron et al. (RHEL, LOIC) IJP</td></tr><tr><td>CAMERON</td><td>78B</td><td>NP B146 327</td><td>W. Cameron et al. (RHEL, LOIC) IJP</td></tr><tr><td>DEBELLEFON</td><td>78</td><td>NC 42A 403</td><td>A. de Bellefon et al. (CDEF, SACL) IJP</td></tr><tr><td>BACCARI</td><td>77</td><td>NC 41A 96</td><td>B. Baccari et al. (SACL, CDEF) IJP</td></tr><tr><td>DEBELLEFON</td><td>77</td><td>NC 37A 175</td><td>A. de Bellefon et al. (CDEF, SACL) IJP</td></tr><tr><td>GOPAL</td><td>77</td><td>NP B119 362</td><td>G.P. Gopal et al. (LOIC, RHEL) IJP</td></tr><tr><td>NAKKASYAN</td><td>75</td><td>NP B93 85</td><td>A. Nakkasyan (CERN) IJP</td></tr><tr><td>KANE</td><td>74</td><td>LBL-2452</td><td>D.F. Kane (LBL) IJP</td></tr></table>

$$ \Lambda(2325) 3/2^- $$

$$ I(J^P) = 0(\frac{3}{2}^-) \text{ Status: } * $$

### OMITTED FROM SUMMARY TABLE

BACCARI 77 finds this state with either $J^P = 3/2^-$ or $3/2^+$ in a energy-dependent partial-wave analyses of $K^- p \to \Lambda\omega$ from 2070 to 2436 MeV. A subsequent semi-energy-independent analysis from threshold to 2436 MeV selects $3/2^-$. DEBELLEFON 78 (same group) also sees this state in an energy-dependent partial-wave analysis of $K^- p \to \bar{K} N$ data, and finds $J^P = 3/2^-$ or $3/2^+$. They again prefer $J^P = 3/2^-$, but only on the basis of model-dependent considerations.

### Λ(2325) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td colspan="3">≈ 2325 OUR ESTIMATE</td></tr><tr><td>2342 ± 30</td><td>DEBELLEFON</td><td>78 DPWA K&#773; N → K&#773; N</td></tr><tr><td>2327 ± 20</td><td>BACCARI</td><td>77 DPWA K<sup>-</sup> p → Λ<sup>ω</sup></td></tr></tbody></table>

### Λ(2325) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td>177 ± 40</td><td>DEBELLEFON</td><td>78 DPWA K&#773; N → K&#773; N</td></tr><tr><td>160 ± 40</td><td>BACCARI</td><td>77 IPWA K<sup>-</sup> p → Λ<sup>ω</sup></td></tr></tbody></table>

### Λ(2325) DECAY MODES

Mode

<table><tr><td>Γ<sub>1</sub></td><td>N<sup>3</sup>R</td></tr><tr><td>Γ<sub>2</sub></td><td>Λ<sup>ω</sup></td></tr></table>

### Λ(2325) BRANCHING RATIOS

<table><thead><tr><th colspan="3">Γ(N<sup>3</sup>R)/Γ<sub>total</sub></th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td>0.19 ± 0.06</td><td>DEBELLEFON 78</td><td>DPWA K&#773; N → K&#773; N</td></tr></tbody></table>

<table><thead><tr><th colspan="3">(Γ<sub>1</sub>Γ<sub>3</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>3</sup>R → Λ(2325) → Λ<sup>ω</sup></th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td>0.06 ± 0.02</td><td>1 BACCARI</td><td>77 IPWA D<sub>53</sub> wave</td></tr><tr><td>0.05 ± 0.02</td><td>1 BACCARI</td><td>77 DPWA D<sub>13</sub> wave</td></tr><tr><td>0.08 ± 0.03</td><td>1 BACCARI</td><td>77 DPWA D<sub>33</sub> wave</td></tr></tbody></table>

### Λ(2325) FOOTNOTES

¹Note that the three BACCARI 77 entries are for three different waves.

### Λ(2325) REFERENCES

<table><tr><td>DEBELLEFON</td><td>78</td><td>NC 42A 403</td><td>A. de Bellefon et al. (CDEF, SACL) IJP</td></tr><tr><td>BACCARI</td><td>77</td><td>NC 41A 96</td><td>B. Baccari et al. (SACL, CDEF) IJP</td></tr></table>

$$ \Lambda(2350) 9/2^+ $$

$$ I(J^P) = 0(\frac{3}{2}^+) \text{ Status: } ** * $$

DAUM 68 favors $J^P = 7/2^-$ or $9/2^+$. BRICMAN 70 favors $9/2^+$. LASINSKI 71 suggests three states in this region using a Pomeron + resonances model. There are now also three formation experiments from the College de France-Saclay group, DEBELLEFON 77, BACCARI 77, and DEBELLEFON 78, which find $9/2^+$ in energy-dependent partial-wave analyses of $\bar{K} N \to \Sigma\pi, \Lambda\omega$, and $N\bar{K}$.

### Λ(2350) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td colspan="3">2340 to 2370 (≈ 2350) OUR ESTIMATE</td></tr><tr><td>2370 ± 50</td><td>DEBELLEFON</td><td>78 DPWA K&#773; N → K&#773; N</td></tr><tr><td>2365 ± 20</td><td>DEBELLEFON</td><td>77 DPWA K<sup>-</sup> p → Σ<sup>π</sup></td></tr><tr><td>2358 ± 6</td><td>BRICMAN</td><td>70 CNTR Total, charge exchange</td></tr></tbody></table>

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

<table><tr><td>2372</td><td>BACCARI</td><td>77 DPWA K<sup>-</sup> p → Λ<sup>ω</sup></td></tr><tr><td>2344 ± 15</td><td>COOL</td><td>70 CNTR K<sup>-</sup> p, K<sup>-</sup> d total</td></tr><tr><td>2360 ± 20</td><td>LU</td><td>70 CNTR γ p → K<sup>+</sup> Y<sup>*</sup></td></tr><tr><td>2340 ± 7</td><td>BUGG</td><td>68 CNTR K<sup>-</sup> p, K<sup>-</sup> d total</td></tr></table>

### Λ(2350) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td colspan="3">100 to 250 (≈ 150) OUR ESTIMATE</td></tr><tr><td>204 ± 50</td><td>DEBELLEFON</td><td>78 DPWA K&#773; N → K&#773; N</td></tr><tr><td>110 ± 20</td><td>DEBELLEFON</td><td>77 DPWA K<sup>-</sup> p → Σ<sup>π</sup></td></tr><tr><td>324 ± 30</td><td>BRICMAN</td><td>70 CNTR Total, charge exchange</td></tr></tbody></table>

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

<table><tr><td>257</td><td>BACCARI</td><td>77 DPWA K<sup>-</sup> p → Λ<sup>ω</sup></td></tr><tr><td>190</td><td>COOL</td><td>70 CNTR K<sup>-</sup> p, K<sup>-</sup> d total</td></tr><tr><td>55</td><td>LU</td><td>70 CNTR γ p → K<sup>+</sup> Y<sup>*</sup></td></tr><tr><td>140 ± 20</td><td>BUGG</td><td>68 CNTR K<sup>-</sup> p, K<sup>-</sup> d total</td></tr></table>

### Λ(2350) DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>i</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub></td><td>~ 12 %</td></tr><tr><td>Γ<sub>2</sub></td><td>~ 10 %</td></tr><tr><td>Γ<sub>3</sub></td><td>Λ<sup>ω</sup></td></tr></tbody></table>

### Λ(2350) BRANCHING RATIOS

See "Sign conventions for resonance couplings" in the Note on Λ and Σ Resonances.

<table><thead><tr><th colspan="3">Γ(N<sup>3</sup>R)/Γ<sub>total</sub></th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td>~ 0.12 OUR ESTIMATE</td><td>DEBELLEFON</td><td>78 DPWA K&#773; N → K&#773; N</td></tr></tbody></table>

<table><thead><tr><th colspan="3">(Γ<sub>1</sub>Γ<sub>3</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>3</sup>R → Λ(2350) → Σ<sup>π</sup></th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td>-0.11 ± 0.02</td><td>DEBELLEFON</td><td>77 DPWA K<sup>-</sup> p → Σ<sup>π</sup></td></tr></tbody></table>

<table><thead><tr><th colspan="3">(Γ<sub>1</sub>Γ<sub>3</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N<sup>3</sup>R → Λ(2350) → Λ<sup>ω</sup></th></tr><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN COMMENT</th></tr></thead><tbody><tr><td>&lt;0.05</td><td>BACCARI</td><td>77 DPWA K<sup>-</sup> p → Λ<sup>ω</sup></td></tr></tbody></table>

### Λ(2350) REFERENCES

<table><tr><td>DEBELLEFON</td><td>78</td><td>NC 42A 403</td><td>A. de Bellefon et al. (CDEF, SACL) IJP</td></tr><tr><td>BACCARI</td><td>77</td><td>NC 41A 96</td><td>B. Baccari et al. (SACL, CDEF) IJP</td></tr><tr><td>DEBELLEFON</td><td>77</td><td>NC 37A 175</td><td>A. de Bellefon et al. (CDEF, SACL) IJP</td></tr><tr><td>LASINSKI</td><td>71</td><td>NP B29 125</td><td>T.A. Lasinski (EFI) IJP</td></tr><tr><td>BRICMAN</td><td>70</td><td>PL 31B 152</td><td>C. Bricman et al. (CERN, CAEN, SACL)</td></tr><tr><td>COOL</td><td>70</td><td>PR D1 1887</td><td>R.L. Cool et al. (BNL) I</td></tr><tr><td>Also</td><td></td><td>PRL 16 1228</td><td>R.L. Cool et al. (BNL) I</td></tr><tr><td>LU</td><td>70</td><td>PR D2 1846</td><td>D.C. Lu et al. (YALE)</td></tr><tr><td>BUGG</td><td>68</td><td>PR 168 1466</td><td>D.V. Bugg et al. (RHEL, BIRM, CAVE) I</td></tr><tr><td>DAUM</td><td>68</td><td>NP B7 19</td><td>C. Daum et al. (CERN) JP</td></tr></table>
# Baryon Particle Listings

## Λ(2585) Bumps

### Λ(2585) Bumps

$I(J^P) = 0(?) Status: *$

OMITTED FROM SUMMARY TABLE

### Λ(2585) MASS
(BUMPS)

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">≈ 2585 OUR ESTIMATE</td></tr><tr><td>2585 ± 45</td><td>ABRAMS</td><td>70</td><td>CNTR K<sup>-</sup> p, K<sup>-</sup> d total</td></tr><tr><td>2530 ± 25</td><td>LU</td><td>70</td><td>CNTR γp → K<sup>+</sup> Y*</td></tr></tbody></table>

### Λ(2585) WIDTH
(BUMPS)

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>300</td><td>ABRAMS</td><td>70</td><td>CNTR K<sup>-</sup> p, K<sup>-</sup> d total</td></tr><tr><td>150</td><td>LU</td><td>70</td><td>CNTR γp → K<sup>+</sup> Y*</td></tr></tbody></table>

### Λ(2585) DECAY MODES
(BUMPS)

<table><thead><tr><th>Mode</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> N<sup>-</sup>K</td></tr></tbody></table>

### Λ(2585) BRANCHING RATIOS
(BUMPS)

$$(J+\frac{1}{2})\times\Gamma(N\bar{K})/\Gamma_{\text{total}} \qquad \Gamma_1/\Gamma$$
$J$ is not known, so only $(J+\frac{1}{2}) \times \Gamma(N\bar{K})/\Gamma_{\text{total}}$ can be given.

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1</td><td>ABRAMS</td><td>70</td><td>CNTR K<sup>-</sup> p, K<sup>-</sup> d total</td></tr><tr><td>0.12 ± 0.12</td><td>1 BRICMAN</td><td>70</td><td>CNTR Total, charge exchange</td></tr></tbody></table>

### Λ(2585) FOOTNOTES
(BUMPS)

¹The resonance is at the end of the region analyzed — no clear signal.

### Λ(2585) REFERENCES
(BUMPS)

<table><tbody><tr><td>ABRAMS</td><td>70</td><td>PR D1 1917</td><td>R.J. Abrams et al.</td><td>(BNL) 1</td></tr><tr><td>Also</td><td></td><td>PRL 16 1228</td><td>R.L. Cool et al.</td><td>(BNL) 1</td></tr><tr><td>BRICMAN</td><td>70</td><td>PL 31B 152</td><td>C. Bricman et al.</td><td>(CERN, CAEN, SACL)</td></tr><tr><td>LU</td><td>70</td><td>PR D2 1846</td><td>D.C. Lu et al.</td><td>(YALE)</td></tr></tbody></table>
# Σ BARYONS

$(S = -1, I = 1)$

$\Sigma^+ = uus, \Sigma^0 = uds, \Sigma^- = dds$

$\Sigma^+$

$I(J^P) = 1(\frac{1}{2}^+) \text{ Status: } ****$

We have omitted some results that have been superseded by later experiments. See our earlier editions.

## Σ⁺ MASS

The fit uses $Σ^+, Σ^0, Σ^-, \text{ and } Λ$ mass and mass-difference measurements.

<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>1189.37±0.07</td><td>OUR FIT</td><td>Error includes scale factor of 2.2.</td><td></td><td></td></tr><tr><td>1189.37±0.06</td><td>OUR AVERAGE</td><td>Error includes scale factor of 1.8. See the ideogram below.</td><td></td><td></td></tr><tr><td>1189.33±0.04</td><td>607</td><td>1 BOHM</td><td>72 EMUL</td><td></td></tr><tr><td>1189.16±0.12</td><td></td><td>HYMAN</td><td>67 HEBC</td><td></td></tr><tr><td>1189.61±0.08</td><td>4205</td><td>SCHMIDT</td><td>65 HBC</td><td>See note with Λ mass</td></tr><tr><td>1189.48±0.22</td><td>58</td><td>2 BHOWMIK</td><td>64 EMUL</td><td></td></tr><tr><td>1189.38±0.15</td><td>144</td><td>2 BARKAS</td><td>63 EMUL</td><td></td></tr></tbody></table>

¹BOHM 72 is updated with our 1973 $K^-, \pi^-$, and $\pi^0$ masses (Reviews of Modern Physics **45** S1 (1973)).

²These masses have been raised 30 keV to take into account a 46 keV increase in the proton mass and a 21 keV decrease in the $\pi^0$ mass (note added 1967 edition, Reviews of Modern Physics **39** 1 (1967)).

WEIGHTED AVERAGE
1189.37±0.06 (Error scaled by 1.8)

<figure><img src="image_718.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.

## Σ⁺ MEAN LIFE

Measurements with fewer than 1000 events have been omitted.

<table><thead><tr><th>VALUE (10<sup>-10</sup> s)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.8018±0.0026</strong></td><td><strong>OUR AVERAGE</strong></td><td></td><td></td><td></td></tr><tr><td>0.8038±0.0040±0.0014</td><td></td><td>BARBOSA</td><td>00 E761</td><td>hyperons, 375 GeV</td></tr><tr><td>0.8043±0.0080±0.0014</td><td></td><td>1 BARBOSA</td><td>00 E761</td><td>hyperons, 375 GeV</td></tr><tr><td>0.798±0.005</td><td>30k</td><td>MARRAFFINO</td><td>80 HBC</td><td>K<sup>-</sup> p 0.42-0.5 GeV/c</td></tr><tr><td>0.807±0.013</td><td>5719</td><td>CONFORTO</td><td>76 HBC</td><td>K<sup>-</sup> p 1-1.4 GeV/c</td></tr><tr><td>0.795±0.010</td><td>20k</td><td>EISELE</td><td>70 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>0.803±0.008</td><td>10664</td><td>BARLOUTAUD</td><td>69 HBC</td><td>K<sup>-</sup> p 0.4-1.2 GeV/c</td></tr><tr><td>0.83±0.032</td><td>1300</td><td>2 CHANG</td><td>66 HBC</td><td></td></tr></tbody></table>

¹This is a measurement of the $\Sigma^-$ lifetime. Here we assume CPT invariance; see below for the fractional $\Sigma^+ - \Sigma^-$ lifetime difference obtained by BARBOSA 00.

²We have increased the CHANG 66 error of 0.018; see our 1970 edition, Reviews of Modern Physics **42** 87 (1970).

$(\tau_{\Sigma^+} - \tau_{\Sigma^-}) / \tau_{\Sigma^+}$

A test of CPT invariance.

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>(-6±12) x 10<sup>-4</sup></td><td>BARBOSA</td><td>00 E761</td><td>hyperons, 375 GeV</td></tr></tbody></table>

## Σ⁺ MAGNETIC MOMENT

See the "Quark Model" review. Measurements with an error $\ge 0.1 \mu_N$ have been omitted.

<table><thead><tr><th>VALUE (μ<sub>N</sub>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>2.458 ±0.010</strong></td><td><strong>OUR AVERAGE</strong></td><td>Error includes scale factor of 2.1. See the ideogram below.</td><td></td><td></td></tr><tr><td>2.4613±0.0034±0.0040</td><td>250k</td><td>MORELOS</td><td>93 SPEC</td><td>pCu 800 GeV</td></tr><tr><td>2.428±0.036±0.007</td><td>12k</td><td>1 MORELOS</td><td>93 SPEC</td><td>pCu 800 GeV</td></tr><tr><td>2.479±0.012±0.022</td><td>137k</td><td>WILKINSON</td><td>87 SPEC</td><td>pBe 400 GeV</td></tr><tr><td>2.4040±0.0198</td><td>44k</td><td>2 ANKENBRA...</td><td>83 CNTR</td><td>pCu 400 GeV</td></tr></tbody></table>

¹We assume CPT invariance: this is (minus) the $\Sigma^-$ magnetic moment as measured by MORELOS 93. See below for the moment difference testing CPT.

²ANKENBRANDT 83 gives the value $2.38 \pm 0.02 \mu_N$. MORELOS 93 uses the same hyperon magnet and channel and claims to determine the field integral better, leading to the revised value given here.

WEIGHTED AVERAGE
2.458±0.010 (Error scaled by 2.1)

<figure><img src="image_719.png" /></figure>

$$(\mu_{\Sigma^+} + \mu_{\Sigma^-}) / \mu_{\Sigma^+}$$

A test of CPT invariance.

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.014±0.015</strong></td><td><strong>1 MORELOS</strong></td><td>93 SPEC</td><td>pCu 800 GeV</td></tr></tbody></table>

¹This is our calculation from the MORELOS 93 measurements of the $\Sigma^+$ and $\Sigma^-$ magnetic moments given above. The statistical error on $\mu_{\Sigma^-}$ dominates the error here.

## Σ⁺ DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>j</sub>/Γ)</th><th>Confidence level</th></tr></thead><tbody><tr><td>Γ<sub>1</sub></td><td>(51.57±0.30) %</td><td></td></tr><tr><td>Γ<sub>2</sub></td><td>(48.31±0.30) %</td><td></td></tr><tr><td>Γ<sub>3</sub></td><td>(1.23±0.05) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>4</sub></td><td>[a] (4.5±0.5) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>5</sub></td><td>(2.3±0.4) × 10<sup>-5</sup></td><td></td></tr></tbody></table>

$$\begin{array}{l} \Delta S = \Delta Q (SQ) \text{ violating modes or} \\ \Delta S = 1 \text{ weak neutral current (SI) modes} \end{array}$$

<table><tbody><tr><td>Γ<sub>6</sub></td><td>ne<sup>+</sup>ν<sub>e</sub></td><td>SQ</td><td>&lt; 5</td><td>× 10<sup>-6</sup></td><td>90%</td></tr><tr><td>Γ<sub>7</sub></td><td>nμ<sup>+</sup>ν<sub>μ</sub></td><td>SQ</td><td>&lt; 3.0</td><td>× 10<sup>-5</sup></td><td>90%</td></tr><tr><td>Γ<sub>8</sub></td><td>pe<sup>+</sup>e<sup>-</sup></td><td>S1</td><td>&lt; 7</td><td>× 10<sup>-6</sup></td><td></td></tr><tr><td>Γ<sub>9</sub></td><td>pe<sup>+</sup>μ<sup>-</sup></td><td>S1</td><td>(2.4<sup>+1.7</sup><sub>-1.3</sub>)</td><td>× 10<sup>-8</sup></td><td></td></tr></tbody></table>

[a] See the Listings below for the pion momentum range used in this measurement.

## CONSTRAINED FIT INFORMATION

An overall fit to 2 branching ratios uses 14 measurements and one constraint to determine 3 parameters. The overall fit has a $\chi^2 = 7.7$ for 12 degrees of freedom.

The following off-diagonal array elements are the correlation coefficients $\langle\delta x_i \delta x_j\rangle / (\delta x_i \delta x_j)$, in percent, from the fit to the branching fractions, $x_i \equiv \Gamma_i / \Gamma_{\text{total}}$. The fit constrains the $x_i$ whose labels appear in this array to sum to one.

<table><tbody><tr><td>x<sub>2</sub></td><td>-100</td></tr><tr><td>x<sub>3</sub></td><td>12 -14</td></tr><tr><td>x<sub>1</sub></td><td>x<sub>2</sub></td></tr></tbody></table>
## $\Sigma^+$ BRANCHING RATIOS

$$ \Gamma(\pi^+) / \Gamma(N\pi) \qquad \Gamma_2 / (\Gamma_1 + \Gamma_2) $$

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

### 0.4836 $\pm$ 0.0030 OUR FIT

### 0.4836 $\pm$ 0.0030 OUR AVERAGE

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.4828 $\pm$ 0.0036</td><td>10k</td><td>1 MARRAFFINO</td><td>80</td><td>HBC K<sup>-</sup> p 0.42-0.5 GeV/c</td></tr><tr><td>0.488 $\pm$ 0.008</td><td>1861</td><td>NOWAK</td><td>78</td><td>HBC</td></tr><tr><td>0.484 $\pm$ 0.015</td><td>537</td><td>TOVEE</td><td>71</td><td>EMUL</td></tr><tr><td>0.488 $\pm$ 0.010</td><td>1331</td><td>BARLOUTAUD</td><td>69</td><td>HBC K<sup>-</sup> p 0.4-1.2 GeV/c</td></tr><tr><td>0.46 $\pm$ 0.02</td><td>534</td><td>CHANG</td><td>66</td><td>HBC</td></tr><tr><td>0.490 $\pm$ 0.024</td><td>308</td><td>HUMPHREY</td><td>62</td><td>HBC</td></tr></tbody></table>

¹ MARRAFFINO 80 actually gives $\Gamma(\rho\pi^0)/\Gamma(\text{total}) = 0.5172 \pm 0.0036$.

$$ \Gamma(\rho\gamma) / \Gamma(\rho\pi^0) \qquad \Gamma_3 / \Gamma_1 $$

<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>

### 2.38 $\pm$ 0.10 OUR FIT

### 2.38 $\pm$ 0.10 OUR AVERAGE

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.32 $\pm$ 0.11 $\pm$ 0.10</td><td>32k</td><td>TIMM</td><td>95</td><td>E761 Σ<sup>+</sup> 375 GeV</td></tr><tr><td>2.81 $\pm$ 0.39 <sup>+0.21</sup><sub>-0.43</sub></td><td>408</td><td>HESSEY</td><td>89</td><td>CNTR K<sup>-</sup> p → Σ<sup>+</sup> π<sup>-</sup> at rest</td></tr><tr><td>2.52 $\pm$ 0.28</td><td>190</td><td>1 KOBAYASHI</td><td>87</td><td>CNTR π<sup>+</sup> p → Σ<sup>+</sup> K<sup>+</sup></td></tr><tr><td>2.46 <sup>+0.30</sup><sub>-0.35</sub></td><td>155</td><td>BIAGI</td><td>85</td><td>CNTR CERN hyperon beam</td></tr><tr><td>2.11 $\pm$ 0.38</td><td>46</td><td>MANZ</td><td>80</td><td>HBC K<sup>-</sup> p → Σ<sup>+</sup> π<sup>-</sup></td></tr><tr><td>2.1 $\pm$ 0.3</td><td>45</td><td>ANG</td><td>69b</td><td>HBC K<sup>-</sup> p at rest</td></tr><tr><td>2.76 $\pm$ 0.51</td><td>31</td><td>GERSHWIN</td><td>69b</td><td>HBC K<sup>-</sup> p → Σ<sup>+</sup> π<sup>-</sup></td></tr><tr><td>3.7 $\pm$ 0.8</td><td>24</td><td>BAZIN</td><td>65</td><td>HBC K<sup>-</sup> p at rest</td></tr></tbody></table>

¹ KOBAYASHI 87 actually gives $\Gamma(\rho\gamma)/\Gamma(\text{total}) = (1.30 \pm 0.15) \times 10^{-3}$.

$$ \Gamma(\rho\gamma) / \Gamma_{\text{total}} \qquad \Gamma_3 / \Gamma $$

<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>

### 0.996 $\pm$ 0.021 $\pm$ 0.18

¹ This value is quoted by ABLIKIM 23γ for the simultaneous fit to $\Sigma \to \rho\gamma$ and $\bar{\Sigma} \to \bar{\rho}\gamma$ assuming no CP violation. Individual values for the branching fractions are given as $(1.005 \pm 0.032) \times 10^{-3}$ and $(0.993 \pm 0.030) \times 10^{-3}$, respectively.

$$ \Gamma(n\pi^+) / \Gamma(n\pi^+) \qquad \Gamma_4 / \Gamma_2 $$

The $\pi^+$ momentum cuts differ, so we do not average the results but simply use the latest value in the Summary Table.

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

### 0.93 $\pm$ 0.10

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

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.27 $\pm$ 0.05</td><td>29</td><td>ANG</td><td>69b</td><td>HBC π<sup>+</sup> &lt; 110 MeV/c</td></tr><tr><td>~ 1.8</td><td></td><td>BAZIN</td><td>65b</td><td>HBC π<sup>+</sup> &lt; 116 MeV/c</td></tr></tbody></table>

$$ \Gamma(\Lambda e^+ \nu_e) / \Gamma_{\text{total}} \qquad \Gamma_5 / \Gamma $$

<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>

### 2.3 $\pm$ 0.4 OUR AVERAGE

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2.93 $\pm$ 0.74 $\pm$ 0.13</td><td>16</td><td>ABLIKIM</td><td>23AA BES3</td><td>e<sup>+</sup> e<sup>-</sup> → J/ψ → Σ<sup>+</sup> K<sup>+</sup></td></tr><tr><td>1.6 $\pm$ 0.7</td><td>5</td><td>BALTAY</td><td>69</td><td>HBC K<sup>-</sup> p at rest</td></tr><tr><td>2.9 $\pm$ 1.0</td><td>10</td><td>EISELE</td><td>69</td><td>HBC K<sup>-</sup> p at rest</td></tr><tr><td>2.0 $\pm$ 0.8</td><td>6</td><td>BARASH</td><td>67</td><td>HBC K<sup>-</sup> p at rest</td></tr></tbody></table>

$$ \Gamma(\ne e^+ \nu_e) / \Gamma(n\pi^+) \qquad \Gamma_6 / \Gamma_2 $$

Test of $\Delta S = \Delta Q$ rule. Experiments with an effective denominator less than 100,000 have been omitted.

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

### < 1.1 $\times$ 10<sup>-5</sup> OUR LIMIT
Our 90% CL limit = (2.3 events)/(effective denominator sum). [Number of events increased to 2.3 for a 90% confidence level.]

<table><thead><tr><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>111000</td><td>0</td><td>1 EBENHOH</td><td>74 HBC K<sup>-</sup> p at rest</td></tr><tr><td>105000</td><td>0</td><td>1 SECHI-ZORN</td><td>73 HBC K<sup>-</sup> p at rest</td></tr></tbody></table>

¹ Effective denominator calculated by us.

$$ \Gamma(n\mu^+ \nu_\mu) / \Gamma(n\pi^+) \qquad \Gamma_7 / \Gamma_2 $$

Test of $\Delta S = \Delta Q$ rule.

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

### < 6.2 $\times$ 10<sup>-5</sup> OUR LIMIT
Our 90% CL limit = (6.7 events)/(effective denominator sum). [Number of events increased to 6.7 for a 90% confidence level.]

<table><thead><tr><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>33800</td><td>0</td><td>BAGGETT</td><td>69b HBC</td></tr><tr><td>62000</td><td>2</td><td>1 EISELE</td><td>69b HBC</td></tr><tr><td>10150</td><td>0</td><td>2 COURANT</td><td>64 HBC</td></tr><tr><td>1710</td><td>0</td><td>2 NAUENBERG</td><td>64 HBC</td></tr><tr><td>120</td><td>1</td><td>GALTIERI</td><td>62 EMUL</td></tr></tbody></table>

¹ Effective denominator calculated by us.

² Effective denominator taken from EISELE 67.

$$ \Gamma(\rho e^+ e^-) / \Gamma_{\text{total}} \qquad \Gamma_8 / \Gamma $$

<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>

### <7

¹ ANG 69b found three $\rho e^+ e^-$ events in agreement with $\gamma \to e^+ e^-$ conversion from $\Sigma^+ \to \rho\gamma$. The limit given here is for neutral currents.

$$ \Gamma(\rho\mu^+ \nu^-) / \Gamma_{\text{total}} \qquad \Gamma_9 / \Gamma $$

A test for a $\Delta S = 1$ weak neutral current, but also allowed by higher-order electroweak interactions.

<table><thead><tr><th>VALUE (units 10<sup>-8</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead></table>

### 2.4 $^{+1.7}_{-1.3}$ OUR AVERAGE

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

<table><thead><tr><th>2.2 $^{+0.9}_{-0.8}$ $^{+1.5}$</th><th>10.2</th><th>1 AAIJ</th><th>18E</th><th>LHCB pp at 7, 8 TeV</th></tr></thead><tbody><tr><td>8.6 $^{+6.6}_{-5.4}$ $^{+5.5}$</td><td>3</td><td>2 PARK</td><td>05</td><td>HYCP p Cu, 800 GeV</td></tr></tbody></table>

¹ AAIJ 18E sees no structure in the dimuon mass distribution, contrary to PARK 05.

² The masses of the three dimuons of PARK 05 are within 1 MeV of one another, perhaps indicating the existence of a new state $P^0$ with mass 214.3 $\pm$ 0.5 MeV. In that case, the decay is $\Sigma^+ \to p P^0$, $P^0 \to \mu^+ \mu^-$, with a branching fraction of $(3.1^{+2.4}_{-1.9} \pm 1.5) \times 10^{-8}$.

$$ \Gamma(\Sigma^+ \to ne^+ \nu_e) / \Gamma(\Sigma^- \to ne^- \bar{\nu}_e) \qquad \Gamma_6 / \Gamma_3^{\Sigma^-} $$

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

### <0.009 OUR LIMIT
Our 90% CL limit, using $\Gamma(\rho e^+ \nu_e) / \Gamma(n\pi^+)$ above.

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

<table><thead><tr><th>&lt;0.019</th><th>90</th><th>0</th><th>EBENHOH</th><th>74</th><th>HBC K<sup>-</sup> p at rest</th></tr></thead><tbody><tr><th>&lt;0.018</th><th>90</th><th>0</th><th>SECHI-ZORN</th><th>73</th><th>HBC K<sup>-</sup> p at rest</th></tr><tr><th>&lt;0.12</th><th>95</th><th>0</th><th>COLE</th><th>71</th><th>HBC K<sup>-</sup> p at rest</th></tr><tr><th>&lt;0.03</th><th>90</th><th>0</th><th>EISELE</th><th>69b</th><th>HBC See EBENHOH 74</th></tr></tbody></table>

$$ \Gamma(\Sigma^+ \to n\mu^+ \nu_\mu) / \Gamma(\Sigma^- \to n\mu^- \bar{\nu}_\mu) \qquad \Gamma_7 / \Gamma_4^{\Sigma^-} $$

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

### <0.12 OUR LIMIT
Our 90% CL limit, using $\Gamma(n\mu^+ \nu_\mu) / \Gamma(n\pi^+)$ above.

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

<table><thead><tr><th>0.06 $^{+0.045}_{-0.03}$</th><th>2</th><th>EISELE</th><th>69b</th><th>HBC K<sup>-</sup> p at rest</th></tr></thead></table>

$$ \Gamma(\Sigma^+ \to n\ell^+ \nu) / \Gamma(\Sigma^- \to n\ell^- \bar{\nu}_\ell) \qquad (\Gamma_6 + \Gamma_7) / (\Gamma_3^{\Sigma^-} + \Gamma_4^{\Sigma^-}) $$

Test of $\Delta S = \Delta Q$ rule.

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

### <0.043 OUR LIMIT
Our 90% CL limit, using $\Gamma(\Sigma^+ \to n\mu^+ \nu_\mu) + \Gamma(\Sigma^+ \to ne^+ \nu_e) / \Gamma(\Sigma^+ \to n\pi^+)$.

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

<table><thead><tr><th>&lt;0.08</th><th>1</th><th>NORTON</th><th>69</th><th>HBC</th></tr></thead><tbody><tr><th>&lt;0.034</th><th>0</th><th>BAGGETT</th><th>67</th><th>HBC</th></tr></tbody></table>

## $\Sigma^+$ DECAY PARAMETERS

See the "Note on Baryon Decay Parameters" in the neutron Listings. A few early results have been omitted.

$$ \alpha_0 \text{ FOR } \Sigma^+ \to \rho\pi^0 \qquad \text{EVTS} \qquad \text{DOCUMENT ID} \qquad \text{TECN} \qquad \text{COMMENT} $$

### $-0.982 \pm 0.014$ OUR FIT

### $-0.982^{+0.016}_{-0.013}$ OUR AVERAGE

<table><thead><tr><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.998 $^{+0.037}_{-0.009}$</td><td>93k</td><td>1 ABLIKIM</td><td>20x BES3 J/ψ/ψ(2S) → Σ<sup>+</sup>Σ<sup>-</sup></td></tr><tr><td>-0.945 $^{+0.055}_{-0.042}$</td><td>1259</td><td>2 LIPMAN</td><td>73 OSPK π<sup>+</sup> p → Σ<sup>+</sup></td></tr><tr><td>-0.940 $^{+0.045}$</td><td>16k</td><td>BELLAMY</td><td>72 ASPK π<sup>+</sup> p → Σ<sup>+</sup> K<sup>+</sup></td></tr><tr><td>-0.98 $^{+0.05}_{-0.02}$</td><td>1335</td><td>3 HARRIS</td><td>70 OSPK π<sup>+</sup> p → Σ<sup>+</sup> K<sup>+</sup></td></tr><tr><td>-0.999 $^{+0.022}$</td><td>32k</td><td>BANGERTER</td><td>69 HBC K<sup>-</sup> p 0.4 GeV/c</td></tr></tbody></table>

¹ ABLIKIM 20x uses production through $e^+ e^- \to J/\psi \to \Sigma^+ \Sigma^-$ and $e^+ e^- \to \psi(2S) \to \Sigma^+ \Sigma^-$, with 87,815 and 5,327 events, respectively. Note that the reported values of decay parameters $\alpha_0$ of $\Sigma^+$ and $\bar{\alpha}_0$ of $\Sigma^-$ are correlated.

² Decay protons scattered off aluminum.

³ Decay protons scattered off carbon.

$$ \bar{\alpha}_0 \text{ FOR } \Sigma^- \to \bar{\rho}\pi^0 \qquad \text{EVTS} \qquad \text{DOCUMENT ID} \qquad \text{TECN} \qquad \text{COMMENT} $$

<table><thead><tr><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.990 $^{+0.037}_{-0.011}$</td><td>93k</td><td>1 ABLIKIM</td><td>20x BES3 J/ψ/ψ(2S) → Σ<sup>+</sup>Σ<sup>-</sup></td></tr></tbody></table>

¹ ABLIKIM 20x uses production through $e^+ e^- \to J/\psi \to \Sigma^+ \Sigma^-$ and $e^+ e^- \to \psi(2S) \to \Sigma^+ \Sigma^-$, with 87,815 and 5,327 events, respectively. Note that the reported values of decay parameters $\alpha_0$ of $\Sigma^+$ and $\bar{\alpha}_0$ of $\Sigma^-$ are correlated.

$$ (\alpha_0 + \bar{\alpha}_0) / (\alpha_0 - \bar{\alpha}_0) \qquad \text{EVTS} \qquad \text{DOCUMENT ID} \qquad \text{TECN} \qquad \text{COMMENT} $$

<table><thead><tr><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.004 $^{+0.037}_{-0.010}$</td><td>93k</td><td>1 ABLIKIM</td><td>20x BES3 J/ψ/ψ(2S) → Σ<sup>+</sup>Σ<sup>-</sup></td></tr></tbody></table>

¹ ABLIKIM 20x uses production through $e^+ e^- \to J/\psi \to \Sigma^+ \Sigma^-$ and $e^+ e^- \to \psi(2S) \to \Sigma^+ \Sigma^-$, with 87,815 and 5,327 events, respectively. Note that the reported values of decay parameters $\alpha_0$ of $\Sigma^+$ and $\bar{\alpha}_0$ of $\Sigma^-$ are correlated.

$$ \phi_0 \text{ ANGLE FOR } \Sigma^+ \to \rho\pi^0 \qquad (\tan \phi_0 = \beta/\gamma) $$

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

### 36 $^{+34}_{-17}$ OUR AVERAGE

<table><thead><tr><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>38.1 $^{+35.7}_{-37.1}$</td><td>1259</td><td>1 LIPMAN</td><td>73 OSPK π<sup>+</sup> p → Σ<sup>+</sup> K<sup>+</sup></td></tr><tr><td>22 $\pm$ 90</td><td></td><td>2 HARRIS</td><td>70 OSPK π<sup>+</sup> p → Σ<sup>+</sup> K<sup>+</sup></td></tr></tbody></table>

¹ Decay proton scattered off aluminum.

² Decay protons scattered off carbon.
$α_+ / α_0$

Older results have been omitted.

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

$-4.90 \pm 0.27 \text{ OUR FIT}$

$-5.0 \pm 0.4 \text{ OUR AVERAGE}$

$$ \begin{aligned} -4.90 \pm 0.32 \pm 0.21 \quad & 754k & \quad 1 \text{ ABLIKIM} & \quad 23BN BES3 & J/\psi \to \Sigma^+ \Sigma^- \\ -7.3 \pm 2.1 \quad & 23k & \quad \text{MARRAFFINO} & \quad 80 \quad \text{HBC} & K^- p 0.42-0.5 \text{ GeV/c} \end{aligned} $$

¹ ABLIKIM 23BN uses production through $e^+ e^- \to J/\psi \to \Sigma^+ \Sigma^-$ with 10G $J/\psi$ events.

$α_+ \text{ FOR } Σ^+ \to nπ^+$

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

$4.89 \pm 0.26 \text{ OUR FIT}$

$4.9 \pm 0.4 \text{ OUR AVERAGE}$

$$ \begin{aligned} 4.81 \pm 0.31 \pm 0.19 \quad & 754k & \quad 1 \text{ ABLIKIM} & \quad 23BN BES3 & J/\psi \to \Sigma^+ \Sigma^- \\ 3.7 \pm 4.9 \quad & 4101 & \quad \text{BERLEY} & \quad 70B \quad \text{HBC} & K^- p 0.4 \text{ GeV/c} \end{aligned} $$

$$ \begin{aligned} 6.9 \pm 1.7 \quad & 35k & \quad \text{BANGERTER} & \quad 69 \quad \text{HBC} & K^- p 0.4 \text{ GeV/c} \end{aligned} $$

¹ ABLIKIM 23BN uses production through $e^+ e^- \to J/\psi \to \Sigma^+ \Sigma^-$ with 10G $J/\psi$ events.

$\phi_+ \text{ ANGLE FOR } Σ^+ \to nπ^+$

$(\tan \phi_+ = \beta/\gamma)$

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

$167 \pm 20 \text{ OUR AVERAGE}$

$$ \begin{aligned} 184 \pm 24 \quad & 1054 & \quad 1 \text{ BERLEY} & \quad 70B \quad \text{HBC} & K^- p 0.4 \text{ GeV/c} \\ 143 \pm 29 \quad & 560 & \quad \text{BANGERTER} & \quad 69B \quad \text{HBC} & K^- p 0.4 \text{ GeV/c} \end{aligned} $$

¹ Changed from 176 to 184° to agree with our sign convention.

$\bar{\alpha}_- \text{ FOR } \Sigma^- \to \bar{n}\pi^-$

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

$$ \begin{aligned} -5.65 \pm 0.47 \pm 0.22 \quad & 1.1M & \quad 1 \text{ ABLIKIM} & \quad 23BN BES3 & J/\psi \to \Sigma^+ \Sigma^- \end{aligned} $$

¹ ABLIKIM 23BN uses production through $e^+ e^- \to J/\psi \to \Sigma^+ \Sigma^-$ with 10G $J/\psi$ events.

$\bar{\alpha}_- / \bar{\alpha}_0$

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

$$ \begin{aligned} -5.71 \pm 0.53 \pm 0.32 \quad & \text{ABLIKIM} & \quad 23BN BES3 & J/\psi \to \Sigma^+ \Sigma^- \end{aligned} $$

$(\alpha_+ + \bar{\alpha}_-) / (\alpha_+ - \bar{\alpha}_-)$

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

$$ \begin{aligned} -8.0 \pm 5.2 \pm 2.8 \quad & \text{ABLIKIM} & \quad 23BN BES3 & J/\psi \to \Sigma^+ \Sigma^- \end{aligned} $$

$\alpha_γ \text{ FOR } Σ^+ \to pγ$

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

$-0.69 \pm 0.05 \text{ OUR AVERAGE}$

$$ \begin{aligned} -0.652 \pm 0.056 \pm 0.020 \quad & 2.5k & \quad 1 \text{ ABLIKIM} & \quad 23Y \quad BES3 & e^+ e^- \to J/\psi \to \Sigma^+ \Sigma^- \\ -0.720 \pm 0.086 \pm 0.045 \quad & 35k & \quad 2 \text{ FOUCHER} & \quad 92 \quad SPEC & \Sigma^+ 375 \text{ GeV} \\ -0.86 \pm 0.13 \pm 0.04 \quad & 190 & \quad \text{KOBAYASHI} & \quad 87 \quad CNTR & \pi^- p \to \Sigma^+ K^+ \\ -0.53 \pm 0.38 \pm 0.36 \quad & 46 & \quad \text{MANZ} & \quad 80 \quad \text{HBC} & K^- p \to \Sigma^+ \pi^- \\ -1.03 \pm 0.52 \pm 0.42 \quad & 61 & \quad \text{GERSHWIN} & \quad 69B \quad \text{HBC} & K^- p \to \Sigma^+ \pi^- \end{aligned} $$

¹ This value is quoted by ABLIKIM 23γ for the simultaneous fit to $Σ^- \to pγ$ and $Σ^- \to \bar{p}γ$ assuming no CP violation. Individual values are given as $-0.587 \pm 0.082$ and $0.710 \pm 0.076$, respectively.

² See TIMM 95 for a detailed description of the analysis.

## $Σ^+$ REFERENCES

We have omitted some papers that have been superseded by later experiments. See our earlier editions.

<table><tr><td>ABLIKIM</td><td>23AA</td><td>PR D107 0702010</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>23BN</td><td>PRL 131 191802</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>23Y</td><td>PRL 130 211901</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>20X</td><td>PRL 125 052004</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>AAU</td><td>18E</td><td>PRL 120 221803</td><td>R. Aaij et al.</td><td>(LHCb Collab.)</td></tr><tr><td>PARK</td><td>05</td><td>PRL 94 021801</td><td>H.K. Park et al.</td><td>(FNAL HyperCP Collab.)</td></tr><tr><td>BARBOSA</td><td>00</td><td>PR D61 031101</td><td>R.F. Barbosa et al.</td><td>(FNAL E761 Collab.)</td></tr><tr><td>TIMM</td><td>95</td><td>PR D51 4638</td><td>S. Timm et al.</td><td>(FNAL E761 Collab.)</td></tr><tr><td>MORELOS</td><td>93</td><td>PRL 71 3417</td><td>A. Morelos et al.</td><td>(FNAL E761 Collab.)</td></tr><tr><td>FOUCHER</td><td>92</td><td>PRL 68 3004</td><td>M. Foucher et al.</td><td>(FNAL E761 Collab.)</td></tr><tr><td>HESSEY</td><td>89</td><td>ZPHY C42 175</td><td>N.P. Hessey et al.</td><td>(BNL-811 Collab.)</td></tr><tr><td>KOBAYASHI</td><td>87</td><td>PRL 59 868</td><td>M. Kobayashi et al.</td><td>(KYOT)</td></tr><tr><td>WILKINSON</td><td>87</td><td>PRL 58 855</td><td>C.A. Wilkinson et al.</td><td>(WISC, MICH, RUTG+)</td></tr><tr><td>BIAGI</td><td>85</td><td>ZPHY C28 495</td><td>S.F. Blagi et al.</td><td>(CERN WA62 Collab.)</td></tr><tr><td>ANKENBRA...</td><td>83</td><td>PRL 51 863</td><td>C.M. Ankenbrandt et al.</td><td>(FNAL, IOWA, ISU+)</td></tr><tr><td>MANZ</td><td>80</td><td>PRL 96B 217</td><td>A. Manz et al.</td><td>(MPIM, VAND)</td></tr><tr><td>MARRAFFINO</td><td>80</td><td>PRL 21 2501</td><td>J. Marraffino et al.</td><td>(VAND, MPIM)</td></tr><tr><td>NOWAK</td><td>78</td><td>NP B139 61</td><td>R.J. Nowak et al.</td><td>(LOU, BELG, DURH+)</td></tr><tr><td>CONFORTO</td><td>76</td><td>NP Conl05 189</td><td>B. Conforto et al.</td><td>(RHEL, LOIC)</td></tr><tr><td>EBENHOH</td><td>74</td><td>ZPHY 266 367</td><td>H. Ebenhoh et al.</td><td>(HEIDT)</td></tr><tr><td>EBENHOH</td><td>73</td><td>ZPHY 264 413</td><td>W. Ebenhoh et al.</td><td>(HEIDT)</td></tr><tr><td>LIPMAN</td><td>73</td><td>PL 43B 89</td><td>N.H. Lipman et al.</td><td>(RHEL, SUSS, LOWC)</td></tr><tr><td>PDG</td><td>73</td><td>RMP 45 S1</td><td>T.A. Lasinski et al.</td><td>(LBL, BRAN, CERN+)</td></tr><tr><td>SECHI-ZORN</td><td>73</td><td>PR D8 12</td><td>B. Sechi-Zorn, G.A. Snow</td><td>(UMD)</td></tr><tr><td>BELLAMY</td><td>72</td><td>PL 39B 299</td><td>E.H. Bellamy et al.</td><td>(LOWC, RHEL, SUSS)</td></tr><tr><td>BOM</td><td>72</td><td>NP B48 1</td><td>G. Bohn et al.</td><td>(BERL, KIDR, BRUX, IASD+)</td></tr><tr><td>Also</td><td>72</td><td>IHIPE-73.2 Nov</td><td>G. Bohn et al.</td><td>(BERL, KIDR, BRUX, IASD, DUUC+)</td></tr><tr><td>COLE</td><td>71</td><td>PR D4 631</td><td>J. Cole et al.</td><td>(STON, COLU)</td></tr><tr><td>TOVEE</td><td>71</td><td>NP B33 493</td><td>D.N. Tovee et al.</td><td>(LOU, KIDR, BERL+)</td></tr><tr><td>BERLEY</td><td>70B</td><td>PR D1 2015</td><td>D. Berley et al.</td><td>(BNL, MASA, YALE)</td></tr><tr><td>EISELE</td><td>70</td><td>ZPHY 238 372</td><td>F. Eisele et al.</td><td>(HEID)</td></tr><tr><td>HARRIS</td><td>70</td><td>PRL 24 165</td><td>F. Harris et al.</td><td>(MICH, WISC)</td></tr><tr><td>PDG</td><td>70</td><td>RMP 42 87</td><td>A. Barbaro-Galtieri et al.</td><td>(LRL, BRAN+)</td></tr><tr><td>ANG</td><td>69B</td><td>ZPHY 228 151</td><td>G. Ang et al.</td><td>(HEID)</td></tr></table>

<table><tr><td>BAGGETT</td><td>69B</td><td>Thesis MDDP-TR-973</td><td>N.V. Baggett</td><td>(UMD)</td></tr><tr><td>BALTAY</td><td>69</td><td>PRL 22 615</td><td>C. Baltay et al.</td><td>(COLU, STON)</td></tr><tr><td>BANGERTER</td><td>69B</td><td>Thesis UCR 19244</td><td>R.O. Bangerter</td><td>(LRL)</td></tr><tr><td>BANGERTER</td><td>69B</td><td>PR 187 1821</td><td>R.O. Bangerter et al.</td><td>(LRL)</td></tr><tr><td>BARLOUTAUD</td><td>69</td><td>NP B14 153</td><td>R. Barloutaud et al.</td><td>(SACL, CERN, HEID)</td></tr><tr><td>EISELE</td><td>69</td><td>ZPHY 221 1</td><td>F. Eisele et al.</td><td>(HEID)</td></tr><tr><td>Also</td><td>69B</td><td>PRL 13 291</td><td>W. Willis et al.</td><td>(BNL, CERN, HEID, UMD)</td></tr><tr><td>EISELE</td><td>69B</td><td>ZPHY 221 401</td><td>F. Eisele et al.</td><td>(HEID)</td></tr><tr><td>GERSHWIN</td><td>69B</td><td>PR 188 2077</td><td>L.K. Gershwin et al.</td><td>(LRL)</td></tr><tr><td>Also</td><td>69B</td><td>Thesis UCR 19246</td><td>L.K. Gershwin</td><td>(LRL)</td></tr><tr><td>NORTON</td><td>69</td><td>Thesis Nevis 175</td><td>H. Norton</td><td>(COLU)</td></tr><tr><td>BAGGETT</td><td>67</td><td>PRL 19 1458</td><td>N. Baggett et al.</td><td>(UMD)</td></tr><tr><td>Also</td><td>67</td><td>Vienna Abs. 374</td><td>N.V. Baggett, B. Kehoe</td><td>(UMD)</td></tr><tr><td>Also</td><td>67</td><td>Private Comm.</td><td>N.V. Baggett</td><td>(UMD)</td></tr><tr><td>BARASH</td><td>67</td><td>PRL 19 181</td><td>N. Barash et al.</td><td>(UMD)</td></tr><tr><td>EISELE</td><td>67</td><td>ZPHY 205 409</td><td>F. Eisele et al.</td><td>(HEID)</td></tr><tr><td>HYMAN</td><td>67</td><td>PL 25B 376</td><td>L.G. Hyman et al.</td><td>(ANL, CMU, NWES)</td></tr><tr><td>PDG</td><td>67</td><td>RMP 39 1</td><td>A.H. Rosenfeld et al.</td><td>(LRL, CERN, YALE)</td></tr><tr><td>CHANG</td><td>66</td><td>PR 151 1081</td><td>C.Y. Chang</td><td>(COLU)</td></tr><tr><td>Also</td><td>66</td><td>Thesis Nevis 145</td><td>C.Y. Chang</td><td>(COLU)</td></tr><tr><td>BAZIN</td><td>65</td><td>PRL 14 154</td><td>M. Bazin et al.</td><td>(PRIN, COLU)</td></tr><tr><td>BAZIN</td><td>65B</td><td>PR 140 B1358</td><td>M. Bazin et al.</td><td>(PRIN, RUTG, COLU)</td></tr><tr><td>SCHMIDT</td><td>65</td><td>PR 140 B1328</td><td>P. Schmidt</td><td>(COLU)</td></tr><tr><td>BHOWMIK</td><td>64</td><td>NP 53 22</td><td>B. Bhowmik et al.</td><td>(DELH)</td></tr><tr><td>COURANT</td><td>64</td><td>PR 136 B1791</td><td>H. Courant et al.</td><td>(CERN, HEID, UMD+)</td></tr><tr><td>NAUENBERG</td><td>64</td><td>PRL 12 679</td><td>U. Nauenberg et al.</td><td>(COLU, RUTG, PRIN)</td></tr><tr><td>BARKAS</td><td>63</td><td>PR 11 26</td><td>W.H. Barkas, J.N. Dyer, H.H. Heckman</td><td>(LRL)</td></tr><tr><td>Also</td><td>63</td><td>PR 11 26</td><td>J.N. Dyer</td><td>(LRL)</td></tr><tr><td>GALTIERI</td><td>62</td><td>PRL 9 26</td><td>A. Barbaro-Galtieri et al.</td><td>(LRL)</td></tr><tr><td>HUMPHREY</td><td>62</td><td>PR 127 1305</td><td>W.E. Humphrey, R.R. Ross</td><td>(LRL)</td></tr></table>

$\Sigma^0$

$I(J^P) = 1(\frac{1}{2}^+)$ Status: ****

COURANT 63 and ALFF 65, using $Σ^0 \to \Lambda e^+ e^-$ decays (Dalitz decays), determined the $Σ^0$ parity to be positive, given that $J = 1/2$ and that certain very reasonable assumptions about form factors are true. The results of experiments involving the Primakoff effect, from which the $Σ^0$ mean life and $Σ^0 \to \Lambda$ transition magnetic moment come (see below), strongly support $J = 1/2$.

## $Σ^0$ MASS

The fit uses $Σ^+, Σ^0, Σ^-, \text{and } \Lambda$ mass and mass-difference measurements.

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

$1192.64 \pm 0.024 \text{ OUR FIT}$

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

$$ 1192.65 \pm 0.020 \pm 0.014 \quad 3327 \quad 1 \text{ WANG} \quad 97 \text{ SPEC} \quad \Sigma^0 \to \Lambda\gamma \to (\rho\gamma^-)(e^+ e^-) $$

¹ This WANG 97 result is redundant with the $Σ^0-\Lambda$ mass-difference measurement below.

$m_{\Sigma^-} - m_{\Sigma^0}$

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

$4.807 \pm 0.035 \text{ OUR FIT}$

$4.86 \pm 0.08 \text{ OUR AVERAGE}$

$$ \begin{aligned} 4.87 \pm 0.12 \quad & 37 \quad \text{DOSCH} & 65 \quad \text{HBC} \\ 5.01 \pm 0.12 \quad & 12 \quad \text{SCHMIDT} & 65 \quad \text{HBC} \\ 4.75 \pm 0.1 \quad & 18 \quad \text{BURNSTEIN} & 64 \quad \text{HBC} \end{aligned} \quad \text{See note with } \Lambda \text{ mass} $$

$m_{\Sigma^0} - m_{\Lambda}$

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

$$ \begin{aligned} 76.959 \pm 0.023 \text{ OUR FIT} \quad & 9327 \quad \text{WANG} & 97 \quad \text{SPEC} \quad \Sigma^0 \to \Lambda\gamma \to (\rho\gamma^-)(e^+ e^-) \end{aligned} $$

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

$$ \begin{aligned} 76.23 \pm 0.55 \quad & 109 \quad \text{COLAS} & 75 \quad \text{HLBC} \\ 76.63 \pm 0.28 \quad & 208 \quad \text{SCHMIDT} & 65 \quad \text{HBC} \end{aligned} \quad \text{See note with } \Lambda \text{ mass} $$

## $Σ^0$ MEAN LIFE

These lifetimes are deduced from measurements of the cross sections for the Primakoff process $\Lambda \to Σ^0$ in nuclear Coulomb fields. An alternative expression of the same information is the $Σ^0-\Lambda$ transition magnetic moment given in the following section. The relation is $(\mu_{Σ^+}/\mu_N)^2 \tau = 1.92951 \times 10^{-19}$ s (see DEVLIN 86).

$$ \text{VALUE (10}^{-20}\text{)} \quad \text{DOCUMENT ID} \quad \text{TECN} \quad \text{COMMENT} $$

$7.4 \pm 0.7 \text{ OUR EVALUATION}$

$$ 6.5 \pm 1.7 \quad 2 \text{ DEVLIN} \quad 86 \quad \text{SPEC} \quad \text{Primakoff effect} $$

$$ 7.6 \pm 0.5 \pm 0.7 \quad 3 \text{ PETERSEN} \quad 86 \quad \text{SPEC} \quad \text{Primakoff effect} $$

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

$$ 5.8 \pm 1.3 \quad 2 \text{ DYDAK} \quad 77 \quad \text{SPEC} \quad \text{See DEVLIN 86} $$

² DEVLIN 86 is a recalculation of the results of DYDAK 77 removing a numerical approximation made in that work.

³ An additional uncertainty of the Primakoff formalism is estimated to be < 5%.
|$\mu(\Sigma^0 \to \Lambda)$| TRANSITION MAGNETIC MOMENT

See the note in the $\Sigma^0$ mean-life section above. Also, See the "Quark Model" review.

<table><thead><tr><th>VALUE (μ<sub>N</sub>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>1.61±0.08 OUR AVERAGE</strong></td><td></td><td></td><td></td></tr><tr><td>1.72<sup>+0.17</sup><sub>-0.19</sub></td><td>4 DEVLIN</td><td>86</td><td>SPEC Primakoff effect</td></tr><tr><td>1.59±0.05±0.07</td><td>5 PETERSEN</td><td>86</td><td>SPEC Primakoff effect</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1.82<sup>+0.25</sup><sub>-0.18</sub></td><td>4 DYDAK</td><td>77</td><td>SPEC See DEVLIN 86</td></tr></tbody></table>

⁴DEVLIN 86 is a recalculation of the results of DYDAK 77 removing a numerical approximation made in that work.

⁵An additional uncertainty of the Primakoff formalism is estimated to be < 2.5%.

$\Sigma^0$ DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>f</sub>/Γ)</th><th>Confidence level</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> Λγ</td><td>100%</td><td></td></tr><tr><td>Γ<sub>2</sub> Λγγ</td><td>&lt; 3%</td><td>90%</td></tr><tr><td>Γ<sub>3</sub> Λe<sup>+</sup>e<sup>-</sup></td><td>[a] 5 × 10<sup>-3</sup></td><td></td></tr></tbody></table>

[a] A theoretical value using QED.

$\Sigma^0$ BRANCHING RATIOS

<table><thead><tr><th>Γ(Λγγ)/Γ<sub>total</sub></th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th></tr></thead><tbody><tr><td><u>&lt;0.03</u></td><td>90</td><td>COLAS</td><td>75 HLBC</td></tr></tbody></table>

<table><thead><tr><th>Γ(Λe<sup>+</sup>e<sup>-</sup>)/Γ<sub>total</sub></th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th></tr></thead><tbody><tr><td><u>0.00545</u></td><td>58</td><td>FEINBERG</td><td>58 Theoretical QED calculation</td></tr></tbody></table>

$\Sigma^0$ REFERENCES

<table><tr><td>WANG</td><td>97</td><td>PR D56 2544</td><td>M.H.L.S. Wang et al. (BNL-E766 Collab.)</td></tr><tr><td>DEVLIN</td><td>86</td><td>PR D34 1626</td><td>T. Devlin, P.C. Petersen, A. Beretvas (RUTG)</td></tr><tr><td>PETERSEN</td><td>86</td><td>PRL 57 949</td><td>P.C. Petersen et al. (RUTG, WISC, MICH+)</td></tr><tr><td>DYDAK</td><td>77</td><td>NP B118.1</td><td>F. Dydak et al. (CERN, DORT, HEIDH)</td></tr><tr><td>COLAS</td><td>75</td><td>NP B91 253</td><td>J. Colas et al. (ORSAY)</td></tr><tr><td>ALFF</td><td>65</td><td>PR 137 B1105</td><td>C. Alff et al. (COLU, RUTG, BNL) P</td></tr><tr><td>DOSCH</td><td>65</td><td>PL 14 239</td><td>H.C. Dosch et al. (HEID)</td></tr><tr><td>SCHMIDT</td><td>65</td><td>PR 140 B1328</td><td>P. Schmidt (COLU)</td></tr><tr><td>BURNSTEIN</td><td>64</td><td>PRL 13 66</td><td>R.A. Burnstein et al. (UMD)</td></tr><tr><td>COURANT</td><td>63</td><td>PRL 10 409</td><td>H. Courant et al. (CERN, UMD) P</td></tr><tr><td>FEINBERG</td><td>58</td><td>PR 109 1019</td><td>G. Feinberg (BNL)</td></tr></table>

<figure><img src="image_720.png" /></figure>

$$I(J^P) = 1(\frac{1}{2}^+) \text{ Status: } ****$$

We have omitted some results that have been superseded by later experiments. See our earlier editions.

$\Sigma^-$ MASS

The fit uses $\Sigma^+, \Sigma^0, \Sigma^-$, and $\Lambda$ mass and mass-difference measurements.

<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><strong>1197.449±0.029 OUR FIT</strong></td><td></td><td>Error includes scale factor of 1.1.</td><td></td><td></td></tr><tr><td><strong>1197.45 ±0.04 OUR AVERAGE</strong></td><td></td><td>Error includes scale factor of 1.2.</td><td></td><td></td></tr><tr><td>1197.417±0.040</td><td>GUREV</td><td>93 SPEC</td><td>$\Sigma^-$ C atom, crystal diff.</td><td></td></tr><tr><td>1197.532±0.057</td><td>GALL</td><td>88 CNTR</td><td>$\Sigma^-$ Pb, $\Sigma^-$ W atoms</td><td></td></tr><tr><td>1197.43 ±0.08</td><td>SCHMIDT</td><td>65 HBC</td><td>See note with $\Lambda$ mass</td><td></td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1197.24 ±0.15</td><td>1 DUGAN</td><td>75 CNTR</td><td>Exotic atoms</td><td></td></tr><tr><td colspan="5">¹GALL 88 concludes that the DUGAN 75 mass needs to be reevaluated.</td></tr></tbody></table>

$m_{\Sigma^-} - m_{\Sigma^+}$

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th></tr></thead><tbody><tr><td><strong>8.08±0.08 OUR FIT</strong></td><td></td><td>Error includes scale factor of 1.9.</td><td></td></tr><tr><td><strong>8.09±0.16 OUR AVERAGE</strong></td><td></td><td></td><td></td></tr><tr><td>7.91±0.23</td><td>86</td><td>BOHM</td><td>72 EMUL</td></tr><tr><td>8.25±0.25</td><td>2500</td><td>DOSCH</td><td>65 HBC</td></tr><tr><td>8.25±0.40</td><td>87</td><td>BARKAS</td><td>63 EMUL</td></tr></tbody></table>

$m_{\Sigma^-} - m_{\Lambda}$

<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><strong>81.766±0.029 OUR FIT</strong></td><td></td><td>Error includes scale factor of 1.1.</td><td></td><td></td></tr><tr><td><strong>81.69 ±0.07 OUR AVERAGE</strong></td><td></td><td></td><td></td><td></td></tr><tr><td>81.64 ±0.09</td><td>2279</td><td>HEPP</td><td>68 HBC</td><td></td></tr></tbody></table>

<table><tr><td>81.80 ±0.13</td><td>85</td><td>SCHMIDT</td><td>65 HBC</td><td>See note with $\Lambda$ mass</td></tr><tr><td>81.70 ±0.19</td><td>64 HBC</td><td>BURNSTEIN</td><td></td><td></td></tr></table>

$\Sigma^-$ MEAN LIFE

Measurements with an error $\ge 0.2 \times 10^{-10}$ s have been omitted.

<table><thead><tr><th>VALUE (10<sup>-10</sup> s)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>1.479±0.011 OUR AVERAGE</strong></td><td></td><td>Error includes scale factor of 1.3.</td><td></td><td>See the ideogram below.</td></tr><tr><td>1.480±0.014</td><td>16k</td><td>MARRAFFINO</td><td>80 HBC</td><td>$\Sigma^-$ p 0.42-0.5 GeV/c</td></tr><tr><td>1.49 ±0.03</td><td>8437</td><td>CONFORTO</td><td>76 HBC</td><td>$\Sigma^-$ p 1-1.4 GeV/c</td></tr><tr><td>1.463±0.039</td><td>2400</td><td>ROBERTSON</td><td>72 HBC</td><td>$\Sigma^-$ p 0.25 GeV/c</td></tr><tr><td>1.42 ±0.05</td><td>1383</td><td>BAKKER</td><td>71 DBC</td><td>$\Sigma^-$ N $\to \Sigma^-$ $\pi\pi$</td></tr><tr><td>1.41 +0.09</td><td></td><td>TOVEE</td><td>71 EMUL</td><td></td></tr><tr><td>-0.08</td><td></td><td></td><td></td><td></td></tr><tr><td>1.485±0.022</td><td>100k</td><td>EISELE</td><td>70 HBC</td><td>$\Sigma^-$ p at rest</td></tr><tr><td>1.472±0.016</td><td>10k</td><td>BARLOUTAUD</td><td>69 HBC</td><td>$\Sigma^-$ p 0.4-1.2 GeV/c</td></tr><tr><td>1.38 ±0.07</td><td>506</td><td>WHITESIDE</td><td>68 HBC</td><td>$\Sigma^-$ p at rest</td></tr><tr><td>1.666±0.075</td><td>3267</td><td>¹ CHANG</td><td>66 HBC</td><td>$\Sigma^-$ p at rest</td></tr><tr><td>1.58 ±0.06</td><td>1208</td><td>HUMPHREY</td><td>62 HBC</td><td>$\Sigma^-$ p at rest</td></tr></tbody></table>

¹We have increased the CHANG 66 error of 0.026; see our 1970 edition, Reviews of Modern Physics **42** 87 (1970).

<figure><img src="image_721.png" /><figcaption>$\Sigma^-$ mean life (10$^{-10}$ s)</figcaption></figure>

$\Sigma^-$ MAGNETIC MOMENT

See the "Quark Model" review. Measurements with an error $\ge 0.3 \mu_N$ have been omitted.

<table><caption>WEIGHTED AVERAGE
-1.160±0.025 (Error scaled by 1.7)</caption><thead><tr><th>VALUE (μ<sub>N</sub>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>-1.160±0.025 OUR AVERAGE</strong></td><td></td><td>Error includes scale factor of 1.7.</td><td></td><td>See the ideogram below.</td></tr><tr><td>-1.105±0.029±0.010</td><td>HERTZOG</td><td>88 CNTR</td><td>$\Sigma^-$ Pb, $\Sigma^-$ W atoms</td><td></td></tr><tr><td>-1.166±0.014±0.010</td><td>ZAPALAC</td><td>86 SPEC</td><td>$\pi e^-$, $\pi n^-$ decays</td><td></td></tr><tr><td>-1.23 ±0.03 ±0.03</td><td>WAH</td><td>85 CNTR</td><td>$p\text{Cu} \to \Sigma^-$ X</td><td></td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>-0.89 ±0.14</td><td>516k</td><td>DECK</td><td>83 SPEC</td><td>$p\text{Be} \to \Sigma^-$ X</td></tr></tbody></table>

<figure><img src="image_722.png" /><figcaption>$\Sigma^-$ magnetic moment ($\mu_N$)</figcaption></figure>
## Σ⁻ CHARGE RADIUS

<table><thead><tr><th>VALUE (fm)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.780 ± 0.080 ± 0.060</td><td></td><td></td><td></td></tr></tbody></table>

¹ESCHRICH 01 actually gives $\langle r^2 \rangle = (0.61 \pm 0.12 \pm 0.09)$ fm².

## Σ⁻ DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>i</sub>/Γ)</th><th>Confidence level</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> nπ<sup>-</sup></td><td>(99.848 ± 0.005) %</td><td></td></tr><tr><td>Γ<sub>2</sub> nπ<sup>-</sup>γ</td><td rowspan="4">[a] ( 4.6 ± 0.6 ) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>3</sub> n e<sup>-</sup>ν<sub>e</sub></td><td>( 1.017 ± 0.034 ) × 10<sup>-3</sup></td><td></td></tr><tr><td>Γ<sub>4</sub> n μ<sup>-</sup>ν<sub>μ</sub></td><td>( 4.5 ± 0.4 ) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>5</sub> Λe<sup>-</sup>ν<sub>e</sub></td><td>( 5.73 ± 0.27 ) × 10<sup>-5</sup></td><td></td></tr><tr><td>Γ<sub>6</sub> Σ<sup>+</sup>X</td><td>&lt; 1.2</td><td>× 10<sup>-4</sup></td><td>90%</td></tr></tbody></table>

### Lepton number (L) violating modes

<table><tr><td>Γ<sub>7</sub> p e<sup>-</sup> e<sup>-</sup></td><td>L</td><td>&lt; 6.7</td><td>× 10<sup>-5</sup></td><td>90%</td></tr></table>

[a] See the Listings below for the pion momentum range used in this measurement.

## CONSTRAINED FIT INFORMATION

An overall fit to 3 branching ratios uses 16 measurements and one constraint to determine 4 parameters. The overall fit has a $\chi^2 = 8.7$ for 13 degrees of freedom.

The following off-diagonal array elements are the correlation coefficients $\langle \delta x_i \delta x_j \rangle / (\delta x_i \delta x_j)$, in percent, from the fit to the branching fractions, $x_i \equiv \Gamma_i/\Gamma_{\text{total}}$. The fit constrains the $x_i$ whose labels appear in this array to sum to one.

<figure><img src="image_723.png" /></figure>

1

## Σ⁻ BRANCHING RATIOS

$$ \Gamma(n\pi^{-}\gamma)/\Gamma(n\pi^{-}) \qquad \Gamma_2/\Gamma_1 $$
The $\pi^+$ momentum cuts differ, so we do not average the results but simply use the latest value for the Summary Table.

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.46 ± 0.06</td><td>292</td><td>EBENHOH</td><td>73</td><td>HBC π<sup>+</sup> &lt; 150 MeV/c</td></tr></tbody></table>

• • • We do not use the following data for averages, fits, limits, etc. • • •
0.10 ± 0.02 23 ANG 69B HBC π<sup>-</sup> &lt; 110 MeV/c
~ 1.1 BAZIN 65B HBC π<sup>-</sup> &lt; 166 MeV/c

$$ \Gamma(ne^{-}\nu_{e})/\Gamma(n\pi^{-}) \qquad \Gamma_{3}/\Gamma_{1} $$
Measurements with an error $\ge 0.2 \times 10^{-3}$ have been omitted.

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

### 1.019 ± 0.035 OUR FIT

### 1.019 + 0.031 / -0.040 OUR AVERAGE

<table><tr><td>0.96 ± 0.05</td><td>2847</td><td>BOURQUIN</td><td>83c SPEC</td><td>SPS hyperon beam</td></tr><tr><td>1.09 ± 0.06</td><td>601</td><td>1 EBENHOH</td><td>74 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>1.05 ± 0.07</td><td>455</td><td>1 SECHI-ZORN</td><td>73 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>0.97 ± 0.15</td><td>57</td><td>COLE</td><td>71 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>1.11 ± 0.09</td><td>180</td><td>BIERMAN</td><td>68 HBC</td><td></td></tr></table>

¹An additional negative systematic error is included for internal radiative corrections and latest form factors; see BOURQUIN 83c.

$$ \Gamma(n\mu^{-}\nu_{\mu})/\Gamma(n\pi^{-}) \qquad \Gamma_{4}/\Gamma_{1} $$

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

### 0.45 ± 0.04 OUR FIT

### 0.45 ± 0.04 OUR AVERAGE

<table><tr><td>0.38 ± 0.11</td><td>13</td><td>COLE</td><td>71 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>0.43 ± 0.06</td><td>72</td><td>ANG</td><td>69 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>0.43 ± 0.09</td><td>56</td><td>BAGGETT</td><td>69 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>0.56 ± 0.20</td><td>11</td><td>BAZIN</td><td>65B HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>0.66 ± 0.15</td><td>22</td><td>COURANT</td><td>64 HBC</td><td></td></tr></table>

$$ \Gamma(\Lambda e^{-}\nu_{e})/\Gamma(n\pi^{-}) \qquad \Gamma_{5}/\Gamma_{1} $$

<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></table>

### 0.574 ± 0.027 OUR FIT

### 0.574 ± 0.027 OUR AVERAGE

<table><tr><td>0.561 ± 0.031</td><td>1620</td><td>1 BOURQUIN</td><td>82 SPEC</td><td>SPS hyperon beam</td></tr><tr><td>0.63 ± 0.11</td><td>114</td><td>THOMPSON</td><td>80 ASPK</td><td>Hyperon beam</td></tr><tr><td>0.52 ± 0.09</td><td>31</td><td>BALTAY</td><td>69 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>0.69 ± 0.12</td><td>31</td><td>EISELE</td><td>69 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>0.64 ± 0.12</td><td>35</td><td>BARASH</td><td>67 HBC</td><td>K<sup>-</sup> p at rest</td></tr><tr><td>0.75 ± 0.28</td><td>11</td><td>COURANT</td><td>64 HBC</td><td>K<sup>-</sup> p at rest</td></tr></table>

¹The value is from BOURQUIN 83b, and includes radiation corrections and new acceptance.

$$ \Gamma(\Sigma^{+}X)/\Gamma_{\text{total}} \qquad \Gamma_{6}/\Gamma $$

Here mode X can be any particle combination.

<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;1.2 × 10<sup>-4</sup></td><td>90</td><td>ABLIKIM</td><td>21F</td><td>BES 1,311 M J/ψ decays</td></tr></tbody></table>

### Lepton number (L) violating modes

$$ \Gamma(pe^{-}e^{-})/\Gamma_{\text{total}} \qquad \Gamma_{7}/\Gamma $$

<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;6.7 × 10<sup>-5</sup></td><td>90</td><td>ABLIKIM</td><td>21F</td><td>BES 1,311 M J/ψ decays</td></tr></tbody></table>

## Σ⁻ DECAY PARAMETERS

See the “Note on Baryon Decay Parameters” in the neutron Listings. Older, outdated results have been omitted.

$$ \alpha_{-} \text{ FOR } \Sigma^{-} \rightarrow n\pi^{-} $$

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.068 ± 0.008 OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>-0.062 ± 0.024</td><td>28k</td><td>HANSL</td><td>78 HBC</td><td>K<sup>-</sup> p → Σ<sup>+</sup>π<sup>+</sup></td></tr><tr><td>-0.067 ± 0.011</td><td>60k</td><td>BOGERT</td><td>70 HBC</td><td>K<sup>-</sup> p 0.4 GeV/c</td></tr><tr><td>-0.071 ± 0.012</td><td>51k</td><td>BANGERTER</td><td>69 HBC</td><td>K<sup>-</sup> p 0.4 GeV/c</td></tr></tbody></table>

$$ \phi \text{ ANGLE FOR } \Sigma^{-} \rightarrow n\pi^{-} \qquad (\tan\phi = \beta / \gamma) $$

<table><thead><tr><th>VALUE (°)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>10 ± 15 OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>+ 5 ± 23</td><td>1092</td><td>1 BERLEY</td><td>70B HBC</td><td>n rescattering</td></tr><tr><td>14 ± 19</td><td>1385</td><td>BANGERTER</td><td>69B HBC</td><td>K<sup>-</sup> p 0.4 GeV/c</td></tr></tbody></table>

¹BERLEY 70B changed from -5 to +5° to agree with our sign convention.

$$ g_A/g_V \text{ FOR } \Sigma^{-} \rightarrow ne^{-}\nu_e $$

Measurements with fewer than 500 events have been omitted. Where necessary, signs have been changed to agree with our conventions, which are given in the “Note on Baryon Decay Parameters” in the neutron Listings. What is actually listed is $|g_1/f_1 - 0.237g_2/f_2|$. This reduces to $g_A/g_V = g_1(0)/f_1(0)$ on making the usual assumption that $g_2 = 0$. See also the note on HSUEH 88.

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.340 ± 0.017 OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>+0.327 ± 0.007 ± 0.019</td><td>50k</td><td>1 HSUEH</td><td>88 SPEC</td><td>Σ<sup>-</sup> 250 GeV</td></tr><tr><td>+0.34 ± 0.05</td><td>4456</td><td>2 BOURQUIN</td><td>83C SPEC</td><td>SPS hyperon beam</td></tr><tr><td>+0.385 ± 0.037</td><td>3507</td><td>3 TANENBAUM</td><td>74 ASPK</td><td></td></tr></tbody></table>

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

<table><tr><td>0.29 ± 0.07</td><td>25k</td><td>HSUEH</td><td>85 SPEC</td><td>See HSUEH 88</td></tr><tr><td>0.17 ± 0.09</td><td>519</td><td>DECAMP</td><td>77 ELEC</td><td>Hyperon beam</td></tr></table>

¹The sign is, with our conventions, unambiguously positive. The value assumes, as usual, that $g_2 = 0$. If $g_2$ is included in the fit, than (with our sign convention) $g_2 = -0.56 \pm 0.37$, with a corresponding reduction of $g_A/g_V$ to +0.20 ± 0.08.

²BOURQUIN 83c favors the positive sign by at least 2.6 standard deviations.

³TANENBAUM 74 gives 0.435 ± 0.035, assuming no $q^2$ dependence in $g_A$ and $g_V$. The listed result allows $q^2$ dependence, and is taken from HSUEH 88.

$$ f_2(0)/f_1(0) \text{ FOR } \Sigma^{-} \rightarrow ne^{-}\nu_e $$

The signs have been changed to be in accord with our conventions, given in the “Note on Baryon Decay Parameters” in the neutron Listings.

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.97 ± 0.14 OUR AVERAGE</td><td></td><td></td><td></td><td></td></tr><tr><td>+0.96 ± 0.07 ± 0.13</td><td>50k</td><td>HSUEH</td><td>88 SPEC</td><td>Σ<sup>-</sup> 250 GeV</td></tr><tr><td>+1.02 ± 0.34</td><td>4456</td><td>BOURQUIN</td><td>83C SPEC</td><td>SPS hyperon beam</td></tr></tbody></table>

$$ \text{TRIPLE CORRELATION COEFFICIENT } D \text{ for } \Sigma^{-} \rightarrow ne^{-}\nu_e $$

The coefficient $D$ of the term $D \cdot (\rho_e \times \rho_\nu)$ in the $\Sigma^{-} \rightarrow ne^{-}\nu_e$ decay angular distribution. A nonzero value would indicate a violation of time-reversal invariance.

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.11 ± 0.10</td><td>50k</td><td>HSUEH</td><td>88 SPEC</td><td>Σ<sup>-</sup> 250 GeV</td></tr></tbody></table>