Δ(2000) BREIT-WIGNER PHOTON DECAY AMPLITUDES

Δ(2000) → ργ, helicity-1/2 amplitude A₁/₂

<table><thead><tr><th>VALUE (GeV<sup>-1/2</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>• • •</td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>-0.061 ± 0.018</td><td>1 SHRESTHA</td><td>12A</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2000) → ργ, helicity-3/2 amplitude A₃/₂

<table><thead><tr><th>VALUE (GeV<sup>-1/2</sup>)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>• • •</td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.158 ± 0.032</td><td>1 SHRESTHA</td><td>12A</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2000) REFERENCES

<table><tr><td>SVARC</td><td>14</td><td>PR C89 045205</td></tr><tr><td>SHRESTHA</td><td>12A</td><td>PR C86 055203</td></tr><tr><td>VRANA</td><td>00</td><td>PRPL 328 181</td></tr><tr><td>MANLEY</td><td>92</td><td>PR D45 4002</td></tr><tr><td>Also</td><td></td><td>PR D30 904</td></tr><tr><td>CUTKOSKY</td><td>80</td><td>Toronto Conf. 19</td></tr><tr><td>Also</td><td></td><td>PR D20 2839</td></tr><tr><td>HOEHLER</td><td>79</td><td>PDAT 12-1</td></tr></table>

<table><tr><td>A. Svarc et al.</td><td>(RBI Zagreb, UNI Tuzla)</td></tr><tr><td>M. Shrestha, D.M. Manley</td><td>(KSU)</td></tr><tr><td>T.P. Vrana, S.A. Dytman, T.-S.H. Lee</td><td>(PITT, ANL)</td></tr><tr><td>D.M. Manley, E.M. Saleski</td><td>(KSA) IJP</td></tr><tr><td>D.M. Manley et al.</td><td>(VPI)</td></tr><tr><td>R.E. Cutkosky et al.</td><td>(CMU, LBL)</td></tr><tr><td>R.E. Cutkosky et al.</td><td>(CMU, LBL)</td></tr><tr><td>G. Hohler et al.</td><td>(KARLT)</td></tr></table>

$$ \Delta(2150) 1/2^- $$

$$ I(J^P) = \frac{3}{2}(\frac{1}{2}^-) \text{ Status: } * $$

OMITTED FROM SUMMARY TABLE

Δ(2150) 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>2140 ± 80</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</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>200 ± 80</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2150) ELASTIC POLE RESIDUE

MODULUS $|r|$

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>7 ± 2</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

PHASE $\theta$

<table><thead><tr><th>VALUE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-60 ± 90</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2150) BREIT-WIGNER MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2150 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2150) BREIT-WIGNER WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>200 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2150) 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> Nπ</td><td>6–10 %</td></tr></tbody></table>

Δ(2150) BRANCHING RATIOS

<table><thead><tr><th>Γ(Nπ)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>8 ± 2</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2150) REFERENCES

<table><tr><td>CUTKOSKY</td><td>80</td><td>Toronto Conf. 19</td><td>R.E. Cutkosky et al.</td><td>(CMU, LBL) IJP</td></tr><tr><td>Also</td><td></td><td>PR D20 2839</td><td>R.E. Cutkosky et al.</td><td>(CMU, LBL)</td></tr></table>

$$ \Delta(2200) 7/2^- $$

$$ I(J^P) = \frac{3}{2}(\frac{1}{2}^-) \text{ Status: } *** $$

Δ(2200) POLE POSITION

REAL PART

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

2050 to 2150 (≈ 2100) OUR ESTIMATE

<table><tr><td>1963 ± 1</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>2100 ± 50</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>• • •</td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>2142</td><td>ROenchEN</td><td>15A</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></table>

260 to 420 (≈ 340) OUR ESTIMATE

<table><tr><td>328 ± 2</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>340 ± 80</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>• • •</td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>486</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></table>

Δ(2200) ELASTIC POLE RESIDUE

MODULUS $|r|$

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>6.8 ± 0.3</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>8 ± 3</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>• • •</td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>17</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

PHASE $\theta$

<table><thead><tr><th>VALUE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-80 ± 1</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>-70 ± 40</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>• • •</td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>-56</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2200) INELASTIC POLE RESIDUE

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

Normalized residue in $N\pi \rightarrow \Delta(2200) \rightarrow \Sigma K$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.001 ± 0.002</td><td>-123 ± 1</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>• • •</td><td></td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.005</td><td>-103</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Normalized residue in $N\pi \rightarrow \Delta(2200) \rightarrow \Delta\pi, D$-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>0.16 ± 0.01</td><td>100 ± 1</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>• • •</td><td></td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.23</td><td>107</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Normalized residue in $N\pi \rightarrow \Delta(2200) \rightarrow \Delta\pi, G$-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>0.003 ± 0.001</td><td>152 ± 3</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>• • •</td><td></td><td></td><td></td><td>We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.022</td><td>-151</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2200) BREIT-WIGNER 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>2150 to 2250 (≈ 2200) OUR ESTIMATE</strong></td></tr><tr><td>2176 ± 40</td><td>ANISOVICH</td><td>17</td><td>DPWA Multichannel</td></tr><tr><td>2200 ± 80</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>2215 ± 60</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2200) BREIT-WIGNER WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>210 ± 70</td><td>ANISOVICH</td><td>17</td><td>DPWA Multichannel</td></tr><tr><td>450 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>400 ± 100</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>
Δ(2200) 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> Nπ</td><td>2–8 %</td></tr><tr><td>Γ<sub>2</sub> ΣK</td><td>1–7 %</td></tr><tr><td>Γ<sub>3</sub> Nππ</td><td>>45 %</td></tr><tr><td>Γ<sub>4</sub> Δπ</td><td>>45 %</td></tr><tr><td>Γ<sub>5</sub> Δπ, D-wave</td><td>>40 %</td></tr><tr><td>Γ<sub>6</sub> Δπ, G-wave</td><td>5–25 %</td></tr><tr><td>Γ<sub>7</sub> Δη</td><td>seen</td></tr><tr><td>Γ<sub>8</sub> Δη, D-wave</td><td></td></tr></tbody></table>

Δ(2200) BRANCHING RATIOS

<table><tbody><tr><td colspan="3"><b>Γ(Nπ)/Γ<sub>total</sub></b></td><td colspan="2"><b>Γ<sub>1</sub>/Γ</b></td></tr><tr><td colspan="3"><b>VALUE (%)</b></td><td colspan="2"><b>DOCUMENT ID</b></td><td colspan="2"><b>TECN</b></td><td colspan="2"><b>COMMENT</b></td></tr><tr><td colspan="9"><b>2–8 % OUR ESTIMATE</b></td></tr><tr><td colspan="9">3.5 ± 1.5</td></tr><tr><td colspan="9">6 ± 2</td></tr><tr><td colspan="9">5 ± 2</td></tr><tr><td colspan="3"><b>Γ(ΣK)/Γ<sub>total</sub></b></td><td colspan="2"><b>Γ<sub>2</sub>/Γ</b></td></tr><tr><td colspan="3"><b>VALUE</b></td><td colspan="2"><b>DOCUMENT ID</b></td><td colspan="2"><b>TECN</b></td><td colspan="2"><b>COMMENT</b></td></tr><tr><td colspan="9">0.04 ± 0.03</td></tr><tr><td colspan="3"><b>Γ(Δπ, D-wave)/Γ<sub>total</sub></b></td><td colspan="2"><b>Γ<sub>5</sub>/Γ</b></td></tr><tr><td colspan="3"><b>VALUE</b></td><td colspan="2"><b>DOCUMENT ID</b></td><td colspan="2"><b>TECN</b></td><td colspan="2"><b>COMMENT</b></td></tr><tr><td colspan="9"><b>>40 % OUR ESTIMATE</b></td></tr><tr><td colspan="9">0.70 ± 0.30</td></tr><tr><td colspan="3"><b>Γ(Δπ, G-wave)/Γ<sub>total</sub></b></td><td colspan="2"><b>Γ<sub>6</sub>/Γ</b></td></tr><tr><td colspan="3"><b>VALUE</b></td><td colspan="2"><b>DOCUMENT ID</b></td><td colspan="2"><b>TECN</b></td><td colspan="2"><b>COMMENT</b></td></tr><tr><td colspan="9">0.15 ± 0.10</td></tr><tr><td colspan="3"><b>Γ(Δη, D-wave)/Γ<sub>total</sub></b></td><td colspan="2"><b>Γ<sub>8</sub>/Γ</b></td></tr><tr><td colspan="3"><b>VALUE</b></td><td colspan="2"><b>DOCUMENT ID</b></td><td colspan="2"><b>TECN</b></td><td colspan="2"><b>COMMENT</b></td></tr><tr><td colspan="9">~ 0.01</td></tr></tbody></table>

Δ(2200) PHOTON DECAY AMPLITUDES AT THE POLE

Δ(2200) → Nγ, helicity-1/2 amplitude A<sub>1/2</sub>

<table><thead><tr><th>MODULUS (GeV<sup>-1/2</sup>)</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.104 ± 0.011</td><td>-139 ± 2</td><td>ROENCHEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.106</td><td>-23</td><td>ROENCHEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2200) → Nγ, helicity-3/2 amplitude A<sub>3/2</sub>

<table><thead><tr><th>MODULUS (GeV<sup>-1/2</sup>)</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.021 ± 0.013</td><td>-180 ± 20</td><td>ROENCHEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.157</td><td>-60</td><td>ROENCHEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2200) REFERENCES

<table><tr><td>ROENCHEN</td><td>22</td><td>EPJ A58 229</td></tr><tr><td>ANISOVICH</td><td>17</td><td>PL B766 357</td></tr><tr><td>ROENCHEN</td><td>15A</td><td>EPJ A51 70</td></tr><tr><td>CUTKOSKY</td><td>80</td><td>Toronto Conf. 19</td></tr><tr><td>Also</td><td></td><td>PR D20 2839</td></tr><tr><td>HOEHLER</td><td>79</td><td>PDAT 12-1</td></tr><tr><td>Also</td><td></td><td>Toronto Conf. 3</td></tr></table>

<table><tr><td>D. Roenchen et al.</td></tr><tr><td>A.V. Anisovich et al.</td></tr><tr><td>D. Roenchen et al.</td></tr><tr><td>R.E. Cutkosky et al.</td></tr><tr><td>R.E. Cutkosky et al.</td></tr><tr><td>G. Hohler et al.</td></tr><tr><td>R. Koch</td></tr></table>

(JULI, GWU, BONN+)

(CMU, LBL) IJP
(CMU, LBL) IJP
(KARLT) IJP
(KARLT) IJP

$$\Delta(2300) \ 9/2^+$$

$$I(J^P) = \frac{3}{2}(\frac{5}{2}^+) \text{ Status: } **$$

OMITTED FROM SUMMARY TABLE

Δ(2300) POLE POSITION

REAL PART

<table><tr><td>VALUE (MeV)</td></tr><tr><td>2370 ± 80</td></tr></table>

<table><tr><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></table>

−2×IMAGINARY PART

<table><tr><td>VALUE (MeV)</td></tr><tr><td>420 ± 160</td></tr></table>

<table><tr><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></table>

Δ(2300) ELASTIC POLE RESIDUE

MODULUS |r|

<table><tr><td>VALUE (MeV)</td></tr><tr><td>10 ± 4</td></tr></table>

<table><tr><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></table>

PHASE θ

<table><tr><td>VALUE (°)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>-20 ± 30</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></table>

Δ(2300) BREIT-WIGNER MASS

<table><tr><td>VALUE (MeV)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>2400 ± 125</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>2217 ± 80</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></table>

Δ(2300) BREIT-WIGNER WIDTH

<table><tr><td>VALUE (MeV)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>425 ± 150</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>300 ± 100</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></table>

Δ(2300) 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> Nπ</td><td>1–8 %</td></tr></tbody></table>

Δ(2300) BRANCHING RATIOS

<table><tr><td colspan="3"><b>Γ(Nπ)/Γ<sub>total</sub></b></td><td colspan="2"><b>Γ<sub>1</sub>/Γ</b></td></tr><tr><td colspan="3"><b>VALUE (%)</b></td><td colspan="2"><b>DOCUMENT ID</b></td><td colspan="2"><b>TECN</b></td><td colspan="2"><b>COMMENT</b></td></tr><tr><td colspan="9">6 ± 2</td></tr><tr><td colspan="9">3 ± 2</td></tr><tr><td colspan="9">CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="9">HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></table>

Δ(2300) REFERENCES

<table><tr><td>CUTKOSKY</td><td>80</td><td>Toronto Conf. 19</td></tr><tr><td>Also</td><td></td><td>PR D20 2839</td></tr><tr><td>HOEHLER</td><td>79</td><td>PDAT 12-1</td></tr><tr><td>Also</td><td></td><td>Toronto Conf. 3</td></tr></table>

R.E. Cutkosky et al.
R. Koch

(CMU, LBL) IJP
(CMU, LBL)
(KARLT) IJP
(KARLT) IJP

$$\Delta(2350) \ 5/2^-$$

$$I(J^P) = \frac{3}{2}(\frac{5}{2}^-) \text{ Status: } *$$

OMITTED FROM SUMMARY TABLE

Δ(2350) POLE POSITION

REAL PART

<table><tr><td>VALUE (MeV)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>2400 ± 125</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>2427</td><td>VRANA</td><td>00</td><td>DPWA Multichannel</td></tr></table>

−2×IMAGINARY PART

<table><tr><td>VALUE (MeV)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>400 ± 150</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>458</td><td>VRANA</td><td>00</td><td>DPWA Multichannel</td></tr></table>

Δ(2350) ELASTIC POLE RESIDUE

MODULUS |r|

<table><tr><td>VALUE (MeV)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>15 ± 8</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></table>



PHASE θ

<table><tr><td>VALUE (°)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>-70 ± 70</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></table>



Δ(2350) BREIT-WIGNER MASS

<table><tr><td>VALUE (MeV)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>2400 ± 125</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>2305 ± 26</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></table>



• • • We do not use the following data for averages, fits, limits, etc. • • •
2459 ± 100 VRANA 00 DPWA Multichannel

Δ(2350) BREIT-WIGNER WIDTH

<table><tr><td>VALUE (MeV)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>400 ± 150</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>300 ± 70</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></table>



• • • We do not use the following data for averages, fits, limits, etc. • • •
480 ± 360 VRANA 00 DPWA Multichannel
Δ(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> Nπ</td><td>4–30 %</td></tr></tbody></table>

Δ(2350) BRANCHING RATIOS

<table><thead><tr><th>Γ(Nπ)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>20 ± 10</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>4 ± 2</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>7 ± 14</td><td>VRANA</td><td>00</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2350) REFERENCES

<table><tr><td>VRANA</td><td>00</td><td>PRPL 328 181</td><td>T.P. Vrana, S.A. Dytmman, T.-S.H. Lee (PITT, ANL)</td></tr><tr><td>CUTKOSKY</td><td>80</td><td>Toronto Conf. 19</td><td>R.E. Cutkosky et al. (CMU, LBL) IJP</td></tr><tr><td>Also</td><td></td><td>PR D20 2839</td><td>R.E. Cutkosky et al. (CMU, LBL)</td></tr><tr><td>HOEHLER</td><td>79</td><td>PDAT 12-1</td><td>G. Hohler et al. (KARLT) IJP</td></tr><tr><td>Also</td><td></td><td>Toronto Conf. 3</td><td>R. Koch (KARLT) IJP</td></tr></table>

$$ \Delta(2390) 7/2^+ $$

$$ I(J^P) = \frac{3}{2}(\frac{7}{2}^+) \text{ Status: } * $$

OMITTED FROM SUMMARY TABLE

Δ(2390) 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>2223 ± 15 ± 19</td><td>1 SVARC</td><td>14</td><td>L+P πN → πN</td></tr><tr><td>2350 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</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>431 ± 26 ± 7</td><td>1 SVARC</td><td>14</td><td>L+P πN → πN</td></tr><tr><td>260 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2390) ELASTIC POLE RESIDUE

MODULUS |r|

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>26 ± 2 ± 1</td><td>1 SVARC</td><td>14</td><td>L+P πN → πN</td></tr><tr><td>12 ± 6</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

PHASE θ

<table><thead><tr><th>VALUE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>−160 ± 5 ± 11</td><td>1 SVARC</td><td>14</td><td>L+P πN → πN</td></tr><tr><td>− 90 ± 60</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2390) BREIT-WIGNER MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2350 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>2425 ± 60</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2390) BREIT-WIGNER WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>300 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>300 ± 80</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2390) 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> Nπ</td><td>3–12 %</td></tr></tbody></table>

Δ(2390) BRANCHING RATIOS

<table><thead><tr><th>Γ(Nπ)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>8 ± 4</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>7 ± 4</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2390) FOOTNOTES

Δ(2390) REFERENCES

<table><tr><td>SVARC</td><td>14</td><td>PR C89 045205</td><td>A. Svarc et al. (RBI Zagreb, UNI Tuzla)</td></tr><tr><td>CUTKOSKY</td><td>80</td><td>Toronto Conf. 19</td><td>R.E. Cutkosky et al. (CMU, LBL) IJP</td></tr><tr><td>Also</td><td></td><td>PR D20 2839</td><td>R.E. Cutkosky et al. (CMU, LBL)</td></tr><tr><td>HOEHLER</td><td>79</td><td>PDAT 12-1</td><td>G. Hohler et al. (KARLT) IJP</td></tr><tr><td>Also</td><td></td><td>Toronto Conf. 3</td><td>R. Koch (KARLT) IJP</td></tr></table>

$$ \Delta(2400) 9/2^- $$

$$ I(J^P) = \frac{3}{2}(\frac{9}{2}^-) \text{ Status: } ** $$

OMITTED FROM SUMMARY TABLE

Δ(2400) 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>2458 ± 2</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>2260 ± 60</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1931</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr><tr><td>1983</td><td>ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</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>280 ± 2</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>320 ± 160</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>442</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr><tr><td>878</td><td>ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr></tbody></table>

Δ(2400) ELASTIC POLE RESIDUE

MODULUS |r|

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>5.4 ± 2.7</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>8 ± 4</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>13</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr><tr><td>24</td><td>ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr></tbody></table>

PHASE θ

<table><thead><tr><th>VALUE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>8.4 ± 17</td><td>ROenchEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td>− 25 ± 15</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>− 96</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr><tr><td>− 139</td><td>ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr></tbody></table>

Δ(2400) INELASTIC POLE RESIDUE

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

Normalized residue in $Nπ → Δ(2400) → ΣK$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.004 ± 0.003</td><td>17 ± 15</td><td>ROenchEN</td><td>22</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>0.009</td><td>25</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Normalized residue in $Nπ → Δ(2400) → 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>0.10 ± 0.05</td><td>17 ± 11</td><td>ROenchEN</td><td>22</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>0.18</td><td>− 110</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Normalized residue in $Nπ → Δ(2400) → Σπ, I-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>0.019 ± 0.003</td><td>− 120 ± 25</td><td>ROenchEN</td><td>22</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>0.012</td><td>− 1.0</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2400) BREIT-WIGNER MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2643 ± 141</td><td>1 ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>2300 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>2468 ± 50</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2400) BREIT-WIGNER WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>895 ± 432</td><td>ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>330 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>480 ± 100</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

<footnote n="1">¹ Fit to the amplitudes of HOEHLER 79.</footnote>

<footnote n="1">¹ Statistical error only.</footnote>

<footnote n="2">² Statistical error only.</footnote>
Δ(2400) 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> Nπ</td><td>3–9 %</td></tr></tbody></table>

Δ(2400) BRANCHING RATIOS

<table><thead><tr><th>Γ(Nπ)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>6.4 ± 2.2</td><td>3 ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>5 ± 2</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>6 ± 3</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody><tfoot><tr><td colspan="4">3 Statistical error only.</td></tr></tfoot></table>

Δ(2400) PHOTON DECAY AMPLITUDES AT THE POLE

Δ(2400) → Nγ, helicity-1/2 amplitude A<sub>1/2</sub>

<table><thead><tr><th>MODULUS (GeV<sup>-1/2</sup>)</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.021 ± 0.007</td><td>-67 ± 12</td><td>ROENCHEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>-0.034</td><td>63</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2400) → Nγ, helicity-3/2 amplitude A<sub>3/2</sub>

<table><thead><tr><th>MODULUS (GeV<sup>-1/2</sup>)</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.022 ± 0.007</td><td>122 ± 7</td><td>ROENCHEN</td><td>22</td><td>DPWA Multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.054</td><td>-75</td><td>ROenchEN</td><td>15A</td><td>DPWA Multichannel</td></tr></tbody></table>

Δ(2400) REFERENCES

<table><tr><td>ROENCHEN</td><td>22</td><td>EPJ A58 229</td><td>D. Roenchen et al.</td><td></td></tr><tr><td>ROENCHEN</td><td>15A</td><td>EPJ A51 70</td><td>D. Roenchen et al.</td><td></td></tr><tr><td>ARNDT</td><td>06</td><td>PR C74 045205</td><td>R.A. Arndt et al.</td><td></td></tr><tr><td>CUTKOSKY</td><td>80</td><td>Toronto Conf. 19</td><td>R.E. Cutkosky et al.</td><td>(GWU)</td></tr><tr><td>Also</td><td></td><td>PR D20 2839</td><td>R.E. Cutkosky et al.</td><td>(CMU, LBL) IJP</td></tr><tr><td>HOEHLER</td><td>79</td><td>PDAT 12-1</td><td>G. Hohler et al.</td><td>(CMU, LBL)</td></tr><tr><td>Also</td><td></td><td>Toronto Conf. 3</td><td>R. Koch</td><td>(KARLT) IJP<br/>(KARLT) IJP</td></tr></table>

$$\Delta(2420) 11/2^+$$

$$I(J^P) = \frac{3}{2}(\frac{1}{2}^+) \text{Status: ****}$$

Older and obsolete values are listed and referenced in the 2014 edition, Chinese Physics C38 070001 (2014).

Δ(2420) 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">2300 to 2500 (≈ 2400) OUR ESTIMATE</td></tr><tr><td>2454 ± 4 ± 11</td><td>1 SVARC</td><td>14</td><td>L+P πN → πN</td></tr><tr><td>2360 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>2529</td><td>ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>2300</td><td>HOEHLER</td><td>93</td><td>ARGD πN → πN</td></tr></tbody></table>

1 Fit to the amplitudes of HOEHLER 79.

-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">350 to 550 (≈ 450) OUR ESTIMATE</td></tr><tr><td>462 ± 8 ± 50</td><td>1 SVARC</td><td>14</td><td>L+P πN → πN</td></tr><tr><td>420 ± 100</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>621</td><td>ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>620</td><td>HOEHLER</td><td>93</td><td>ARGD πN → πN</td></tr></tbody></table>

1 Fit to the amplitudes of HOEHLER 79.

Δ(2420) ELASTIC POLE RESIDUE

MODULUS |r|

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">20 to 40 (≈ 30) OUR ESTIMATE</td></tr><tr><td>30 ± 1 ± 7</td><td>1 SVARC</td><td>14</td><td>L+P πN → πN</td></tr><tr><td>18 ± 6</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>33</td><td>ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>39</td><td>HOEHLER</td><td>93</td><td>ARGD πN → πN</td></tr></tbody></table>

1 Fit to the amplitudes of HOEHLER 79.

PHASE θ

<table><thead><tr><th>VALUE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">-60 to 20 (≈ -20) OUR ESTIMATE</td></tr><tr><td>11 ± 1 ± 8</td><td>1 SVARC</td><td>14</td><td>L+P πN → πN</td></tr><tr><td>-30 ± 40</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr></tbody></table>

<table><tr><td colspan="3">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>-45</td><td>ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>-60</td><td>HOEHLER</td><td>93</td><td>ARGD πN → πN</td></tr></table>

1 Fit to the amplitudes of HOEHLER 79.

Δ(2420) BREIT-WIGNER 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">2300 to 2600 (≈ 2450) OUR ESTIMATE</td></tr><tr><td>2633 ± 29</td><td>1 ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>2400 ± 125</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>2416 ± 17</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody><tfoot><tr><td colspan="4">1 Statistical error only.</td></tr></tfoot></table>

Δ(2420) BREIT-WIGNER 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">300 to 700 (≈ 500) OUR ESTIMATE</td></tr><tr><td>692 ± 47</td><td>1 ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>450 ± 150</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>340 ± 28</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody><tfoot><tr><td colspan="4">1 Statistical error only.</td></tr></tfoot></table>

Δ(2420) DECAY MODES

The following branching fractions are our estimates, not fits or averages.

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>j</sub>/Γ)</th></tr></thead><tbody><tr><td>Γ<sub>1</sub> Nπ</td><td>5–10 %</td></tr></tbody></table>

Δ(2420) BRANCHING RATIOS

<table><thead><tr><th>Γ(Nπ)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">5 to 10 (≈ 8) OUR ESTIMATE</td></tr><tr><td>8.5 ± 0.8</td><td>1 ARNDT</td><td>06</td><td>DPWA πN → πN, ηN</td></tr><tr><td>8 ± 3</td><td>CUTKOSKY</td><td>80</td><td>IPWA πN → πN</td></tr><tr><td>8.0 ± 1.5</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

1 Statistical error only.

Δ(2420) REFERENCES

<table><tr><td>PDG</td><td>14</td><td>CP C38 070001</td><td>K. Olive et al.</td><td>(PDG Collab.)</td></tr><tr><td>SVARC</td><td>14</td><td>PR C89 045205</td><td>A. Svarc et al.</td><td>(RBI Zagreb, UNI Tuza)</td></tr><tr><td>ARNDT</td><td>06</td><td>PR C74 045205</td><td>R.A. Arndt et al.</td><td>(GWU)</td></tr><tr><td>HOEHLER</td><td>93</td><td>πN Newsletter 9</td><td>G. Hohler</td><td>(KARL)</td></tr><tr><td>CUTKOSKY</td><td>80</td><td>Toronto Conf. 19</td><td>R.E. Cutkosky et al.</td><td>(CMU, LBL) IJP</td></tr><tr><td>Also</td><td></td><td>PR D20 2839</td><td>R.E. Cutkosky et al.</td><td>(CMU, LBL)</td></tr><tr><td>HOEHLER</td><td>79</td><td>PDAT 12-1</td><td>G. Hohler et al.</td><td>(KARLT) IJP</td></tr><tr><td>Also</td><td></td><td>Toronto Conf. 3</td><td>R. Koch</td><td>(KARLT) IJP</td></tr></table>

$$\Delta(2750) 13/2^-$$

$$I(J^P) = \frac{3}{2}(\frac{13}{2}^-) \text{Status: **}$$

OMITTED FROM SUMMARY TABLE

Δ(2750) BREIT-WIGNER MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>2794 ± 80</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2750) BREIT-WIGNER WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>350 ± 100</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2750) 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> Nπ</td><td>2–6 %</td></tr></tbody></table>

Δ(2750) BRANCHING RATIOS

<table><thead><tr><th>Γ(Nπ)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4.0 ± 1.5</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2750) REFERENCES

<table><tr><td>HOEHLER</td><td>79</td><td>PDAT 12-1</td><td>G. Hohler et al.</td><td>(KARLT) IJP</td></tr><tr><td>Also</td><td></td><td>Toronto Conf. 3</td><td>R. Koch</td><td>(KARLT) IJP</td></tr></table>
$$\Delta(2950) 15/2^+$$

$I(J^P) = \frac{3}{2}(\frac{15}{2}^+) \text{Status: **}$

OMITTED FROM SUMMARY TABLE

Δ(2950) BREIT-WIGNER MASS

<table><thead><tr><th>VALUE (MeV)</th></tr></thead><tbody><tr><td>2990 ± 100</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2950) BREIT-WIGNER WIDTH

<table><thead><tr><th>VALUE (MeV)</th></tr></thead><tbody><tr><td>330 ± 100</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2950) 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> Nπ</td><td>2–6%</td></tr></tbody></table>

Δ(2950) BRANCHING RATIOS

<table><thead><tr><th>Γ(Nπ)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>4 ± 2</td><td>HOEHLER</td><td>79</td><td>IPWA πN → πN</td></tr></tbody></table>

Δ(2950) REFERENCES

HOEHLER
Also

79

PDAT 12-1
Toronto Conf. 3

G. Hohler et al.
R. Koch

(KARLT) IJP
(KARLT) IJP

Δ(~3000 Region)
Partial-Wave Analyses

OMITTED FROM SUMMARY TABLE

We list here miscellaneous high-mass candidates for isospin-3/2 resonances found in partial-wave analyses.

Our 1982 edition also had a Δ(2850) and a Δ(3230). The evidence for them was deduced from total cross-section and 180° elastic cross-section measurements. The Δ(2850) has been resolved into the Δ(2750) $I_{3,13}$ and Δ(2950) $K_{3,15}$. The Δ(3230) is perhaps related to the $K_{3,13}$ of HENDRY 78 and to the $L_{3,17}$ of KOCH 80.

Δ(~3000) BREIT-WIGNER MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>3300</td><td>1 KOCH</td><td>80</td><td>IPWA πN → πN L<sub>3,17</sub> wave</td></tr><tr><td>3500</td><td>1 KOCH</td><td>80</td><td>IPWA πN → πN M<sub>3,19</sub> wave</td></tr><tr><td>2850 ± 150</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN I<sub>3,11</sub> wave</td></tr><tr><td>3200 ± 200</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN K<sub>3,13</sub> wave</td></tr><tr><td>3300 ± 200</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN L<sub>3,17</sub> wave</td></tr><tr><td>3700 ± 200</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN M<sub>3,19</sub> wave</td></tr><tr><td>4100 ± 300</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN N<sub>3,21</sub> wave</td></tr></tbody></table>



Δ(~3000) BREIT-WIGNER WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>700 ± 200</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN I<sub>3,11</sub> wave</td></tr><tr><td>1000 ± 300</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN K<sub>3,13</sub> wave</td></tr><tr><td>1100 ± 300</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN L<sub>3,17</sub> wave</td></tr><tr><td>1300 ± 400</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN M<sub>3,19</sub> wave</td></tr><tr><td>1600 ± 500</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN N<sub>3,21</sub> wave</td></tr></tbody></table>



Δ(~3000) 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> Nπ</td><td>1–8%</td></tr></tbody></table>

Δ(~3000) BRANCHING RATIOS

<table><thead><tr><th>Γ(Nπ)/Γ<sub>total</sub></th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1–8% OUR ESTIMATE</td><td></td><td></td><td></td></tr><tr><td>6 ± 2</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN I<sub>3,11</sub> wave</td></tr><tr><td>5 ± 2</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN K<sub>3,13</sub> wave</td></tr><tr><td>3 ± 1</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN L<sub>3,17</sub> wave</td></tr><tr><td>3 ± 1</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN M<sub>3,19</sub> wave</td></tr><tr><td>2 ± 1</td><td>HENDRY</td><td>78</td><td>MPWA πN → πN N<sub>3,21</sub> wave</td></tr></tbody></table>

Δ(~3000) FOOTNOTES

¹In addition, KOCH 80 reports some evidence for an $S_{31}$ Δ(2700) and a $P_{33}$ Δ(2800).

Δ(~3000) REFERENCES

KOCH
HENDRY
Also

80

Toronto Conf. 3
PRL 41 222
ANP 136 1

R. Koch
A.W. Hendry
A.W. Hendry

(KARLT) IJP
(IND, LBL) IJP
(IND)
# Λ BARYONS
(S = -1, I = 0)

$Λ^0 = uds$

Λ

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

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

## Λ MASS

The fit uses $Λ, Σ^+, Σ^0, Σ^-$ 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 colspan="5"><strong>1115.683±0.006 OUR FIT</strong></td></tr><tr><td colspan="5"><strong>1115.683±0.006 OUR AVERAGE</strong></td></tr><tr><td>1115.678±0.006±0.006</td><td>20k</td><td>HARTOUNI</td><td>94</td><td>SPEC pp 27.5 GeV/c</td></tr><tr><td>1115.690±0.008±0.006</td><td>18k</td><td><sup>1</sup>HARTOUNI</td><td>94</td><td>SPEC pp 27.5 GeV/c</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1115.59 ±0.08</td><td>935</td><td>HYMAN</td><td>72</td><td>HEBC</td></tr><tr><td>1115.39 ±0.12</td><td>195</td><td>MAYEUR</td><td>67</td><td>EMUL</td></tr><tr><td>1115.6 ±0.4</td><td></td><td>LONDON</td><td>66</td><td>HBC</td></tr><tr><td>1115.65 ±0.07</td><td>488</td><td><sup>2</sup>SCHMIDT</td><td>65</td><td>HBC</td></tr><tr><td>1115.44 ±0.12</td><td></td><td><sup>3</sup>BHOWMIK</td><td>63</td><td>RVUE</td></tr></tbody></table>

¹ We assume CPT invariance: this is the $\bar{\Lambda}$ mass as measured by HARTOUNI 94. See below for the fractional mass difference, testing CPT.

² The SCHMIDT 65 masses have been reevaluated using our April 1973 proton and $K^±$ and $π^±$ masses. P. Schmidt, private communication (1974).

³ The mass has been raised 35 keV to take into account a 46 keV increase in the proton mass and an 11 keV decrease in the $π^±$ mass (note added Reviews of Modern Physics 39 1 (1967)).

## $(m_Λ - m_{\bar{\Lambda}}) / m_Λ$

A test of CPT invariance.

<table><thead><tr><th>VALUE (units 10<sup>-5</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.1 ± 1.1</td><td><strong>OUR AVERAGE</strong></td><td colspan="3">Error includes scale factor of 1.6.</td></tr><tr><td>+ 1.3 ± 1.2</td><td>31k</td><td><sup>1</sup>RYBICKI</td><td>96</td><td>NA32 π<sup>-</sup> Cu, 230 GeV</td></tr><tr><td>- 1.08 ± 0.90</td><td></td><td>HARTOUNI</td><td>94</td><td>SPEC pp 27.5 GeV/c</td></tr><tr><td>4.5 ± 5.4</td><td></td><td>CHIEN</td><td>66</td><td>HBC 6.9 GeV/c p̄p</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>-26 ±13</td><td></td><td>BADIER</td><td>67</td><td>HBC 2.4 GeV/c p̄p</td></tr></tbody></table>

¹ RYBICKI 96 is an analysis of old ACCMOR (NA32) data.

## Λ MEAN LIFE

Measurements with an error $≥ 0.1 × 10^{-10}$ s have been omitted altogether, and only the highest-statistics are used.

<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>2.617 ±0.010</strong></td><td><strong>OUR AVERAGE</strong></td><td colspan="3">Error includes scale factor of 1.5. See the ideogram below.</td></tr><tr><td>2.6107 ±0.0037 ±0.0072</td><td>188M</td><td>ACHARYA</td><td>23</td><td>ALCE Pb-Pb → ΛΧ or ΛΧ at 5.02 TeV</td></tr><tr><td>2.69 ±0.03</td><td>53k</td><td>ZECH</td><td>77</td><td>SPEC Neutral hyperon beam</td></tr><tr><td>2.611 ±0.020</td><td>34k</td><td>CLAYTON</td><td>75</td><td>HBC 0.96-1.4 GeV/c K<sup>-</sup>p</td></tr><tr><td>2.626 ±0.020</td><td>36k</td><td>POULARD</td><td>73</td><td>HBC 0.4-2.3 GeV/c K<sup>-</sup>p</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>2.69 ±0.05</td><td>6582</td><td>ALTHOFF</td><td>73B</td><td>OSPK π<sup>+</sup> n → ΛK<sup>+</sup></td></tr><tr><td>2.54 ±0.04</td><td>4572</td><td>BALTAY</td><td>71B</td><td>HBC K<sup>-</sup> p at rest</td></tr><tr><td>2.535 ±0.035</td><td>8342</td><td>GRIMM</td><td>68</td><td>HBC</td></tr><tr><td>2.47 ±0.08</td><td>2600</td><td>HEPP</td><td>68</td><td>HBC</td></tr><tr><td>2.35 ±0.09</td><td>916</td><td>BURAN</td><td>66</td><td>HLBC</td></tr><tr><td>2.452 ±0.056</td><td>2213</td><td>ENGELMANN</td><td>66</td><td>HBC</td></tr><tr><td>-0.054</td><td></td><td></td><td></td><td></td></tr><tr><td>2.59 ±0.09</td><td>794</td><td>HUBBARD</td><td>64</td><td>HBC</td></tr><tr><td>2.59 ±0.07</td><td>1378</td><td>SCHWARTZ</td><td>64</td><td>HBC</td></tr><tr><td>2.36 ±0.06</td><td>2239</td><td>BLOCK</td><td>63</td><td>HEBC</td></tr></tbody></table>

WEIGHTED AVERAGE
2.617±0.010 (Error scaled by 1.5)

<figure><img src="image_715.png" /></figure>

## $(\tau_Λ - \tau_{\bar{\Lambda}}) / \tau_Λ$

A test of CPT invariance.

<table><thead><tr><th>VALUE (units 10<sup>-3</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.9 ± 3.2</strong></td><td><strong>OUR AVERAGE</strong></td><td colspan="3"></td></tr><tr><td>1.3 ± 2.8 ± 2.1</td><td>188M</td><td>ACHARYA</td><td>23</td><td>ALCE Pb-Pb → ΛΧ or ΛΧ at 5.02 TeV</td></tr><tr><td>- 1.8 ± 6.6 ± 5.6</td><td></td><td>BARNES</td><td>96</td><td>CNTR LEAR p̄p → ΛΛ</td></tr><tr><td>44 ± 85</td><td></td><td>BADIER</td><td>67</td><td>HBC 2.4 GeV/c p̄p</td></tr></tbody></table>

## Λ MAGNETIC MOMENT

See the “Quark Model” review. Measurements with an error $≥ 0.15 μ_N$ 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>-0.613 ± 0.004</strong></td><td><strong>OUR AVERAGE</strong></td><td colspan="3"></td></tr><tr><td>-0.606 ± 0.015</td><td>200k</td><td>COX</td><td>81</td><td>SPEC</td></tr><tr><td>-0.6138 ± 0.0047</td><td>3M</td><td>SCHACHIN...</td><td>78</td><td>SPEC</td></tr><tr><td>-0.59 ± 0.07</td><td>350k</td><td>HELLER</td><td>77</td><td>SPEC</td></tr><tr><td>-0.57 ± 0.05</td><td>1.2M</td><td>BUNCE</td><td>76</td><td>SPEC</td></tr><tr><td>-0.66 ± 0.07</td><td>1300</td><td>DAHL-JENSEN</td><td>71</td><td>EMUL 200 kG field</td></tr></tbody></table>

## Λ ELECTRIC DIPOLE MOMENT

A nonzero value is forbidden by both *T* invariance and *P* invariance.

<table><thead><tr><th>VALUE (10<sup>-16</sup> ecm)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>&lt; 1.5</strong></td><td>95</td><td><sup>1</sup>PONDROM</td><td>81</td><td>SPEC</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>&lt;100</td><td>95</td><td><sup>2</sup>BARONI</td><td>71</td><td>EMUL</td></tr><tr><td>&lt;500</td><td>95</td><td>GIBSON</td><td>66</td><td>EMUL</td></tr></tbody></table>

¹ PONDROM 81 measures (−3.0 ± 7.4) × 10<sup>-17</sup> e-cm.

² BARONI 71 measures (−5.9 ± 2.9) × 10<sup>-15</sup> e-cm.

## Λ DECAY MODES

<table><thead><tr><th>Mode</th><th>Fraction (Γ<sub>f</sub>/Γ)</th><th>Confidence level</th></tr></thead><tbody><tr><td>Γ<sub>1</sub></td><td>(64.1 ± 0.5) %</td><td></td></tr><tr><td>Γ<sub>2</sub></td><td>(35.9 ± 0.5) %</td><td></td></tr><tr><td>Γ<sub>3</sub></td><td>(8.3 ± 0.7) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>4</sub></td><td>[a] (8.5 ± 1.4) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>5</sub></td><td>(8.34 ± 0.14) × 10<sup>-4</sup></td><td></td></tr><tr><td>Γ<sub>6</sub></td><td>(1.51 ± 0.19) × 10<sup>-4</sup></td><td></td></tr></tbody></table>

## Lepton (L) and/or Baryon (B) number violating decay modes

<table><tbody><tr><td>Γ<sub>7</sub></td><td>π<sup>+</sup> e<sup>-</sup></td><td>L,B</td><td>&lt; 6</td><td>× 10<sup>-7</sup></td><td>90%</td></tr><tr><td>Γ<sub>8</sub></td><td>π<sup>+</sup> μ<sup>-</sup></td><td>L,B</td><td>&lt; 6</td><td>× 10<sup>-7</sup></td><td>90%</td></tr><tr><td>Γ<sub>9</sub></td><td>π<sup>-</sup> e<sup>+</sup></td><td>L,B</td><td>&lt; 4</td><td>× 10<sup>-7</sup></td><td>90%</td></tr><tr><td>Γ<sub>10</sub></td><td>π<sup>-</sup> μ<sup>+</sup></td><td>L,B</td><td>&lt; 6</td><td>× 10<sup>-7</sup></td><td>90%</td></tr><tr><td>Γ<sub>11</sub></td><td>K<sup>+</sup> e<sup>-</sup></td><td>L,B</td><td>&lt; 2</td><td>× 10<sup>-6</sup></td><td>90%</td></tr><tr><td>Γ<sub>12</sub></td><td>K<sup>+</sup> μ<sup>-</sup></td><td>L,B</td><td>&lt; 3</td><td>× 10<sup>-6</sup></td><td>90%</td></tr><tr><td>Γ<sub>13</sub></td><td>K<sup>-</sup> e<sup>+</sup></td><td>L,B</td><td>&lt; 2</td><td>× 10<sup>-6</sup></td><td>90%</td></tr><tr><td>Γ<sub>14</sub></td><td>K<sup>-</sup> μ<sup>+</sup></td><td>L,B</td><td>&lt; 3</td><td>× 10<sup>-6</sup></td><td>90%</td></tr><tr><td>Γ<sub>15</sub></td><td>K<sup>0</sup> S<sup>ν</sup></td><td>L,B</td><td>&lt; 2</td><td>× 10<sup>-5</sup></td><td>90%</td></tr><tr><td>Γ<sub>16</sub></td><td>p̄π<sup>+</sup></td><td>B</td><td>&lt; 9</td><td>× 10<sup>-7</sup></td><td>90%</td></tr><tr><td>Γ<sub>17</sub></td><td>invisible</td><td></td><td>&lt; 7.4</td><td>× 10<sup>-5</sup></td><td>90%</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 4 branching ratios uses 11 measurements and one constraint to determine 3 parameters. The overall fit has a $\chi^2 = 6.9$ for 9 degrees of freedom.

The following off-diagonal array elements are the correlation coefficients $\langle\delta x_i \delta x_j\rangle / (\delta x_i \cdot \delta x_j)$, 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_716.png" /></figure>

Λ BRANCHING RATIOS

$$ \Gamma(\rho\pi^-)/\Gamma(N\pi) \quad \Gamma_1/(\Gamma_1+\Gamma_2) $$

VALUE EVTS DOCUMENT ID TECN COMMENT

0.641±0.005 OUR FIT

0.640±0.005 OUR AVERAGE

0.646±0.008 4572 BALTAY 71B HBC $\kappa^- p$ at rest

0.635±0.007 6736 DOYLE 69 HBC $\pi^- p \to \Lambda K^0$

0.643±0.016 903 HUMPHREY 62 HBC $\pi^- p \to \Lambda K^0$

0.624±0.030 75 CRAWFORD 59B HBC $\pi^- p \to \Lambda K^0$

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>22AJ</td><td>BES3</td></tr></tbody></table>

$$ \Gamma(\pi n^0)/\Gamma(N\pi) \quad \Gamma_2/(\Gamma_1+\Gamma_2) $$

VALUE EVTS DOCUMENT ID TECN COMMENT

0.359±0.005 OUR FIT

0.310±0.028 OUR AVERAGE

0.35 ± 0.05 BROWN 63 HLBC

0.291±0.034 75 CHRETIEN 63 HLBC

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>22AJ</td><td>BES3</td></tr></tbody></table>

$$ \Gamma(\eta\gamma)/\Gamma(\pi\gamma) \quad \Gamma_3/\Gamma $$

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

0.832±0.038±0.054 13889 1 ABLIKIM

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>22AJ</td><td>BES3</td></tr></tbody></table>

J/ψ → $\Lambda\bar{\Lambda}$

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

1.75 ± 0.15 1816 LARSON 93 SPEC $\kappa^- p$ at rest

1.78 ± 0.24 $^{+0.14}_{-0.16}$ 287 NOBLE 92 SPEC See LARSON 93

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>22AJ</td><td>BES3</td></tr></tbody></table>

1 This ABLIKIM 22AJ value is a factor of 2.1 smaller and differs by 5.6σ from the previous LARSON 93 value.

$$ \Gamma(\eta\gamma)/\Gamma(\pi\eta) \quad \Gamma_3/\Gamma $$

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

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

2.86±0.74±0.57 24 BIAGI 86 SPEC SPS hyperon beam

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>22AJ</td><td>BES3</td></tr></tbody></table>

$$ \Gamma(\rho\pi^-\gamma)/\Gamma(\rho\pi^-) \quad \Gamma_4/\Gamma $$

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

1.32±0.22 72 BAGGETT 72C HBC $\pi^- < 95$ MeV/c

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>22AJ</td><td>BES3</td></tr></tbody></table>

$$ \Gamma(\rho e^-\bar{\nu}_e)/\Gamma(\rho\pi^-) \quad \Gamma_5/\Gamma $$

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

1.301±0.019 OUR AVERAGE

1.335±0.056 7111 BOURQUIN 83 SPEC SPS hyperon beam

1.313±0.024 10k WISE 80 SPEC

1.23 ± 0.11 544 LINDQUIST 77 SPEC $\pi^- p \to \kappa^0 \Lambda$

1.27 ± 0.07 1089 KATZ 73 HBC

1.31 ± 0.06 1078 ALTHOFF 71 OSPK

1.17 ± 0.13 86 1 CANTER 71 HBC $\kappa^- p$ at rest

1.20 ± 0.12 143 2 MALONEY 69 HBC

1.17 ± 0.18 120 2 BAGLIN 64 FBC $\kappa^- \text{ freon } 1.45$ GeV/c

1.23 ± 0.20 150 2 ELY 63 FBC

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>22AJ</td><td>BES3</td></tr></tbody></table>

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

1.32 ± 0.15 218 1 LINDQUIST 71 OSPK See LINDQUIST 77

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>21AG</td><td>BES3</td></tr></tbody></table>

1 Changed by us from $\Gamma(\rho e^-\bar{\nu}_e)/\Gamma(N\pi)$ assuming the authors used $\Gamma(\Lambda \to p\pi^-)/\Gamma(\text{total}) = 2/3$.

2 Changed by us from $\Gamma(\rho e^-\bar{\nu}_e)/\Gamma(N\pi)$ because $\Gamma(\rho e^-\nu)/\Gamma(\rho\pi^-)$ is the directly measured quantity.

$$ \Gamma(\rho\mu^-\bar{\nu}_\mu)/\Gamma(\mu\bar{\nu}) \quad \Gamma_6/\Gamma $$

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

1.51±0.19 OUR FIT

1.48±0.21±0.08 64 1 ABLIKIM 21AG BES3 J/ψ → $\Lambda\bar{\Lambda}$

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>21AG</td><td>BES3</td></tr></tbody></table>

1 ABLIKIM 21AG use $\bar{\Lambda} \to \bar{p}\pi^+$ decay mode as the double tag identifier and thus as indirect normalization.

$$ \Gamma(\rho\mu^-\bar{\nu}_\mu)/\Gamma(N\pi) \quad \Gamma_6/(\Gamma_1+\Gamma_2) $$

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

1.51±0.19 OUR FIT

1.57±0.35 OUR AVERAGE

1.4 ± 0.5 14 BAGGETT 72B HBC $\kappa^- p$ at rest

2.4 ± 0.8 9 CANTER 71B HBC $\kappa^- p$ at rest

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>22P</td><td>BES3</td></tr></tbody></table>

1.3 ± 0.7

3

LIND

64 RVUE

1.5 ± 1.2

2

RONNE

64 FBC

Lepton (L) and/or Baryon (B) number violating decay modes

$$ \Gamma(\pi^+ e^-)/\Gamma_{\text{total}} \quad \Gamma_7/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;6 × 10<sup>-7</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

$$ \Gamma(\pi^+ \mu^-)/\Gamma_{\text{total}} \quad \Gamma_8/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;6 × 10<sup>-7</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

$$ \Gamma(\pi^- e^+)/\Gamma_{\text{total}} \quad \Gamma_9/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;4 × 10<sup>-7</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

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

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;6 × 10<sup>-7</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

$$ \Gamma(K^+ e^-)/\Gamma_{\text{total}} \quad \Gamma_{11}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;2 × 10<sup>-6</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

$$ \Gamma(K^+ \mu^-)/\Gamma_{\text{total}} \quad \Gamma_{12}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;3 × 10<sup>-6</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

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

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;2 × 10<sup>-6</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

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

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;3 × 10<sup>-6</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

$$ \Gamma(K_S \nu)/\Gamma_{\text{total}} \quad \Gamma_{15}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;2 × 10<sup>-5</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

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

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;9 × 10<sup>-7</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 MCCRACKEN</td><td>15</td><td>CLAS</td></tr></tbody></table>

1 Uses B($\Lambda \to p\pi^-$) = (63.9 ± 0.5)% for normalization mode.

$$ \Gamma(\text{invisible})/\Gamma_{\text{total}} \quad \Gamma_{17}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>CL%</th></tr></thead><tbody><tr><td>&lt;7.4 × 10<sup>-5</sup></td><td>90</td></tr></tbody></table>

<table><thead><tr><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1 ABLIKIM</td><td>22P</td><td>BES3</td></tr></tbody></table>

J/ψ → $\Lambda\bar{\Lambda}$

Λ CP-violating decay-rate asymmetries

This is the difference between $\Lambda$ and $\bar{\Lambda}$ decay rates to state $f$ and $\bar{f}$ divided

by the sum of the rates:

$$ A_{CP}(f) = [(B(\Lambda \to f)) - (B(\bar{\Lambda} \to \bar{f}))]/\text{Sum.} $$

$$ A_{CP}(\rho\mu^-\bar{\nu}_\mu) \text{ in } \Lambda \to \rho\mu^-\bar{\nu}_\mu, \bar{\Lambda} \to \bar{p}\mu^+\nu_\mu $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.02±0.14±0.02</td><td>1 ABLIKIM</td><td>21AG</td><td>BES3</td></tr></tbody></table>

Limit on $\bar{\Lambda}\Lambda$ oscillations

Upper limit for the oscillation rate of ($\bar{\Lambda} \to \Lambda$) hyperons. A test of baryon number nonconservation. We quote the oscillation parameter $\delta m_{\bar{\Lambda}\Lambda'}$ deduced from the oscillation rate $P(\Lambda)$ and the hyperon lifetime $\tau_\Lambda$, as $(\delta m_{\bar{\Lambda}\Lambda'})^2 = P(\Lambda) / 2\tau_\Lambda^2$.

<table><thead><tr><th>VALUE (GeV)</th><th>CL%</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>&lt;3.8 × 10<sup>-18</sup></td><td>90</td><td>1 ABLIKIM</td><td>23BM BES3</td><td>J/ψ → pK<sup>-</sup>Λ</td></tr></tbody></table>

1 ABLIKIM 23BM quote the oscillation rate limit $P(\Lambda) < 4.4 \times 10^{-6}$ and calculate the oscillation parameter $\delta m_{\bar{\Lambda}\Lambda}$ given here.
## Λ DECAY PARAMETERS

See the “Note on Baryon Decay Parameters” in the neutron Listings. Some early results have been omitted.

### α<sub>-</sub> FOR Λ → ρπ<sup>-</sup>

OUR FIT value is obtained from measurements of α(Ξ⁻), α<sub>-</sub>(Λ), and α(Ξ⁻)α<sub>-</sub>(Λ).

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.747 ±0.009</strong></td><td><strong>OUR FIT</strong></td><td></td><td></td><td>Error includes scale factor of 2.5.</td></tr><tr><td><strong>0.746 ±0.009</strong></td><td><strong>OUR AVERAGE</strong></td><td></td><td></td><td>Error includes scale factor of 2.5. See the ideogram below.</td></tr><tr><td>0.757 ±0.011 ±0.008</td><td>73k</td><td>ABLIKIM</td><td>22AD BES3</td><td>J/ψ → ΞΞ⁻ → ΛΛππ</td></tr><tr><td>0.7519 ±0.0036 ±0.0024</td><td>3.2M</td><td>ABLIKIM</td><td>22AG BES3</td><td>J/ψ → ΛΛ</td></tr><tr><td>0.721 ±0.006 ±0.005</td><td></td><td><sup>1</sup>IRELAND</td><td>19 CLAS</td><td>K production</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.74 ±0.04</td><td></td><td>AAIJ</td><td>200 LHCB</td><td>Λ<sub>b</sub> → J/ψΛ</td></tr><tr><td>0.750 ±0.009 ±0.004</td><td>420k</td><td>ABLIKIM</td><td>19BJ BES3</td><td>J/ψ → ΛΛ</td></tr><tr><td>0.584 ±0.046</td><td>8500</td><td>ASTBURY</td><td>75 OSPK</td><td></td></tr><tr><td>0.649 ±0.023</td><td>10325</td><td>CLELAND</td><td>72 OSPK</td><td></td></tr><tr><td>0.67 ±0.06</td><td>3520</td><td>DAUBER</td><td>69 HBC</td><td>From Ξ decay</td></tr><tr><td>0.645 ±0.017</td><td>10130</td><td>OVERSETH</td><td>67 OSPK</td><td>Λ from π⁻ p</td></tr><tr><td>0.62 ±0.07</td><td>1156</td><td>CRONIN</td><td>63 CNTR</td><td>Λ from π⁻ p</td></tr></tbody></table>

WEIGHTED AVERAGE
0.746±0.009 (Error scaled by 2.5)

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.

<figure><img src="image_717.png" /></figure>

### α<sub>+</sub> FOR Λ → pπ<sup>+</sup>

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>-0.757 ±0.004</strong></td><td><strong>OUR AVERAGE</strong></td><td></td><td></td><td></td></tr><tr><td>-0.763 ±0.011 ±0.007</td><td>73k</td><td>ABLIKIM</td><td>22AD BES3</td><td>J/ψ → ΞΞ⁻ → ΛΛππ</td></tr><tr><td>-0.7559 ±0.0036 ±0.0030</td><td>3.2M</td><td>ABLIKIM</td><td>22AG BES3</td><td>J/ψ → ΛΛ</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>-0.758 ±0.010 ±0.007</td><td>420k</td><td>ABLIKIM</td><td>19BJ BES3</td><td>J/ψ → ΛΛ</td></tr><tr><td>-0.755 ±0.083 ±0.063</td><td>8.7k</td><td>ABLIKIM</td><td>10 BES</td><td>J/ψ → ΛΛ</td></tr><tr><td>-0.63 ±0.13</td><td>770</td><td>TIXIER</td><td>88 DM2</td><td>J/ψ → ΛΛ</td></tr></tbody></table>

### ω₀ FOR Λ → ππ⁰

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>-0.692 ±0.016 ±0.006</strong></td><td>47k</td><td>ABLIKIM</td><td>19BJ BES3</td><td>J/ψ to ΛΛ</td></tr></tbody></table>

### α<sub>γ</sub> FOR Λ → nγ

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>-0.16 ±0.10 ±0.05</strong></td><td>13889</td><td>ABLIKIM</td><td>22AJ BES3</td><td>J/ψ → ΛΛ</td></tr></tbody></table>

### φ ANGLE FOR Λ → ρπ⁻

<table><thead><tr><th>VALUE (°)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>-6.5 ± 3.5</strong></td><td><strong>OUR AVERAGE</strong></td><td></td><td></td><td></td></tr><tr><td>-7.0 ± 4.5</td><td>10325</td><td>CLELAND</td><td>72 OSPK</td><td>Λ from π⁻ p</td></tr><tr><td>-8.0 ± 6.0</td><td>10130</td><td>OVERSETH</td><td>67 OSPK</td><td>Λ from π⁻ p</td></tr><tr><td>13.0 ± 17.0</td><td>1156</td><td>CRONIN</td><td>63 OSPK</td><td>Λ from π⁻ p</td></tr></tbody></table>

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>1.01 ±0.07</strong></td><td><strong>OUR AVERAGE</strong></td><td></td><td></td><td></td></tr><tr><td>1.000 ±0.068</td><td>4760</td><td>1 OLSEN</td><td>70 OSPK</td><td>π<sup>+</sup> n → ΛK<sup>+</sup></td></tr><tr><td>1.10 ±0.27</td><td></td><td>CORK</td><td>60 CNTR</td><td></td></tr></tbody></table>

### α₀ / α<sub>-</sub> = α(Λ → nπ⁰) / α(Λ → ρπ⁻)

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>1.01 ±0.07</strong></td><td><strong>OUR AVERAGE</strong></td><td></td><td></td><td></td></tr><tr><td>1.000 ±0.068</td><td>4760</td><td>1 OLSEN</td><td>70 OSPK</td><td>π<sup>+</sup> n → ΛK<sup>+</sup></td></tr><tr><td>1.10 ±0.27</td><td></td><td>CORK</td><td>60 CNTR</td><td></td></tr></tbody></table>

### ω₀ / α<sub>+</sub> in Λ → ππ⁰, Λ → pπ⁺

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>0.913 ±0.028 ±0.012</strong></td><td>47k</td><td>ABLIKIM</td><td>19BJ BES3</td><td>J/ψ to ΛΛ</td></tr></tbody></table>

### (α<sub>-</sub> + α<sub>+</sub>)/(α<sub>-</sub> + α<sub>+</sub>) in Λ → ρπ⁻, Λ → pπ⁺

Zero if CP is conserved; α<sub>-</sub> and α<sub>+</sub> are the asymmetry parameters for Λ → ρπ⁻ and Λ → pπ⁺ decay. See also the Ξ⁻ for a similar test involving the decay chain Ξ⁻ → Λπ⁻, Λ → ρπ⁻ and the corresponding antiparticle chain.

<table><thead><tr><th>VALUE (units 10<sup>-2</sup>)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>-0.1 ± 0.4</strong></td><td><strong>OUR AVERAGE</strong></td><td></td><td></td><td></td></tr><tr><td>1.3 ± 0.7 ± 1.1</td><td>369k</td><td>1 LI</td><td>23C BELL</td><td>J/ψ → ΞΞ⁻ → ΛΛππ</td></tr><tr><td>-0.4 ± 1.2 ± 0.9</td><td>73k</td><td>ABLIKIM</td><td>22AD BES3</td><td>J/ψ → ΞΞ⁻ → ΛΛππ</td></tr><tr><td>-0.25 ± 0.46 ± 0.12</td><td>3.2M</td><td>ABLIKIM</td><td>22AG BES3</td><td>J/ψ → ΛΛ</td></tr><tr><td>-8.1 ± 5.5 ± 5.9</td><td>8.7k</td><td>ABLIKIM</td><td>10 BES</td><td>J/ψ → ΛΛ</td></tr><tr><td>1.3 ± 2.2</td><td>96k</td><td>BARNES</td><td>96 CNTR</td><td>LEAR p̄p → ΛΛ</td></tr><tr><td>1 ± 10</td><td>770</td><td>TIXIER</td><td>88 DM2</td><td>J/ψ → ΛΛ</td></tr><tr><td>-2 ±14</td><td>10k</td><td>2 CHAUVAT</td><td>85 CNTR</td><td>p̄p, p̄p p̄ISR</td></tr></tbody></table>

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

<table><thead><tr><th>-0.6 ± 1.2 ± 0.7</th><th>420k</th><th>3 ABLIKIM</th><th>19BJ BES3</th><th>J/ψ → ΛΛ</th></tr></thead><tbody><tr><td>-7 ± 9</td><td>4063</td><td>BARNES</td><td>87 CNTR</td><td>See BARNES 96</td></tr></tbody></table>

$$R = |G_E/G_M| \quad \begin{array}{c} \text{in } \Lambda \rightarrow \rho\pi^{-}, \quad \Lambda \rightarrow \bar{p}\pi^{+} \\ \text{DOCUMENT ID} \\ \text{TECN} \\ \text{COMMENT} \end{array}$$
$$0.96 \pm 0.14 \pm 0.02$$
$$1 \text{ ABLIKIM} \quad 19\text{BF BES3} \quad e^{+} e^{-} \rightarrow \Lambda\bar{\Lambda} \text{ at } \sqrt{s} = 2.396 \text{ GeV}$$

$$\Delta\Phi = \Phi_E - \Phi_M \quad \begin{array}{c} \text{in } \Lambda \rightarrow \rho\pi^{-}, \quad \Lambda \rightarrow \bar{p}\pi^{+} \\ \text{DOCUMENT ID} \\ \text{TECN} \\ \text{COMMENT} \end{array}$$
$$37 \pm 12 \pm 6$$
$$1 \text{ ABLIKIM} \quad 19\text{BF BES3} \quad e^{+} e^{-} \rightarrow \Lambda\bar{\Lambda} \text{ at } \sqrt{s} = 2.396 \text{ GeV}$$

### g<sub>A</sub> / g<sub>V</sub> FOR Λ → p̄e⁻p̄e<sub>e</sub>

Measurements with fewer than 500 events have been omitted. Where necessary, signs have been changed to agree with our conventions. are given in the “Note on Baryon Decay Parameters” in the neutron Listings. The measurements all assume that the form factor g<sub>2</sub> = 0. See also the footnote on DWORKIN 90.

<table><thead><tr><th>VALUE</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td><strong>-0.718 ±0.015</strong></td><td><strong>OUR AVERAGE</strong></td><td></td><td></td><td></td></tr><tr><td>-0.719 ±0.016 ±0.012</td><td>37k</td><td>1 DWORKIN</td><td>90 SPEC</td><td>eν angular corr.</td></tr><tr><td>-0.70 ± 0.03</td><td>7111</td><td>BOURQUIN</td><td>83 SPEC</td><td>Ξ → Λπ<sup>-</sup></td></tr><tr><td>-0.734 ±0.031</td><td>10k</td><td>2 WISE</td><td>81 SPEC</td><td>eν angular correl.</td></tr></tbody></table>

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

<table><thead><tr><th>-0.63 ± 0.06</th><th>817</th><th>ALTHOFF</th><th>73 OSPK</th><th>Polarized Λ</th></tr></thead></table>

## Λ REFERENCES

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

<table><tbody><tr><td>ABLIKIM</td><td>23BM PRL 131 121801</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ACHARYA</td><td>23 PR D108 032009</td><td>S. Acharya et al.</td><td>(ALICE Collab.)</td></tr><tr><td>LI</td><td>23C SCIB 68 583</td><td>L.K. Li et al.</td><td>(BELLE Collab.)</td></tr><tr><td>ABLIKIM</td><td>22AD NAT 606 64</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22AG PRL 129 131801</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22AJ PRL 129 212002</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>22P PR D105 L071101</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>21AG PRL 127 121802</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>AAJ</td><td>200 JHEP 2006 110</td><td>R. Aaij et al.</td><td>(LHCb Collab.)</td></tr><tr><td>ABLIKIM</td><td>19BF PRL 123 122003</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>ABLIKIM</td><td>19BJ NATP 15 631</td><td>M. Ablikim et al.</td><td>(BESIII Collab.)</td></tr><tr><td>IRELAND</td><td>19 PRL 123 182301</td><td>D.G. Ireland et al.</td><td>(GLAS, GWU, JULI+)</td></tr><tr><td>MCCRACKEN</td><td>15 PR D92 072002</td><td>M.E. McCracken et al.</td><td>(JLAB CLAS Collab.)</td></tr><tr><td>ABLIKIM</td><td>16 PR D81 12003</td><td>M. Ablikim et al.</td><td>(BES Collab.)</td></tr><tr><td>BARNES</td><td>96 PR C54 1877</td><td>P.D. Barnes et al.</td><td>(CERN PS-185 Collab.)</td></tr><tr><td>RYBICKI</td><td>96 APP B27 2155</td><td>K. Rybicki</td><td></td></tr><tr><td>HARTOUNI</td><td>94 PRL 72 1322</td><td>E.P. Hartouni et al.</td><td>(BNL E766 Collab.)</td></tr><tr><td>Also</td><td>93 PRL 72 2821 (errat.)</td><td>E.P. Hartouni et al.</td><td>(BNL E766 Collab.)</td></tr><tr><td>LARSON</td><td>92 PR D47 799</td><td>K.D. Larson et al.</td><td>(BNL-811 Collab.)</td></tr><tr><td>NOBLE</td><td>92 PRL 69 414</td><td>A.J. Noble et al.</td><td>(BIRM, BOST, BRO+C)</td></tr><tr><td>DWORKIN</td><td>90 PR D41 780</td><td>J. Dworkin et al.</td><td>(MICH, WISC, RUTG+)</td></tr><tr><td>TIXIER</td><td>88 PL B212 523</td><td>M.H. Tixier et al.</td><td>(DM2 Collab.)</td></tr><tr><td>BARNES</td><td>87 PL B199 147</td><td>P.D. Barnes et al.</td><td>(CMU, SACL, LANL+)</td></tr><tr><td>BIAGI</td><td>86 ZPHY C30 201</td><td>S.F. Biagi et al.</td><td>(BRIS, CERN, GEVA+)</td></tr><tr><td>CHAUVAT</td><td>85 PL 163B 273</td><td>P. Chauvat et al.</td><td>(CERN, CLER, UCLA+)</td></tr><tr><td>BOURQUIN</td><td>83 ZPHY C21 1</td><td>M.H. Bourquin et al.</td><td>(BRIS, GEVA, HEIDP+)</td></tr><tr><td>COX</td><td>81 PRL 46 877</td><td>P.T. Cox et al.</td><td>(MICH, WISC, RUTG, MINN+)</td></tr><tr><td>PONDROM</td><td>81 PR D23 814</td><td>L. Pondrom et al.</td><td>(WISC, MICH, RUTG+)</td></tr><tr><td>WISE</td><td>81 PL 9B8 123</td><td>J.E. Wise et al.</td><td>(MASA, BNL)</td></tr><tr><td>WISE</td><td>80 PL 9B1 165</td><td>J.E. Wise et al.</td><td>(MASA, BNL)</td></tr><tr><td>SCHACHIN...</td><td>78 PRL 41 1348</td><td>L. Schachinger et al.</td><td>(MICH, RUTG, WISC)</td></tr><tr><td>HELLER</td><td>77 PL 6B8 480</td><td>K. Heller et al.</td><td>(MICH, WISC, HEIDH)</td></tr></tbody></table>

<footnote n="1">¹ This is a new analysis based on existing kaon photoproduction data of the CLAS collaboration and using spin algebra constraints.</footnote>

<footnote n="1">¹ OLSEN 70 compares proton and neutron distributions from Λ decay.</footnote>

<footnote n="1">¹ LI 23c quote the average Λ-hyperon asymmetry A<sup>α</sup><sub>C</sub> P from 264k Λ<sup>+</sup><sub>C</sub> → Λπ<sup>+</sup> decays and 105k Λ<sup>+</sup><sub>C</sub> → Σ<sup>0</sup>π<sup>+</sup> decays, under the assumption of no CP violation in the SM for Λ<sup>+</sup><sub>C</sub>, i.e. α<sub>Λ<sup>+</sup><sub>C</sub></sub> = -α<sub>Λ<sup>+</sup><sub>C</sub></sub>.</footnote>

<footnote n="2">² CHAUVAT 85 actually gives α<sub>+</sub>(Λ)/α<sub>-</sub>(Λ) = -1.04 ± 0.29. Assumes polarization is same in p̄p → ΛΛX and p̄p → ΛX. Tests of this assumption, based on C-invariance and fragmentation, are satisfied by the data.</footnote>

<footnote n="3">³ Superseded by ABLIKIM 22AG.</footnote>

<footnote n="1">¹ Determined using the latest BES-III value on the asymmetry parameter α = 0.750 ± 0.010.</footnote>

<footnote n="1">¹ Relative phase between GE and GM, determined using the latest BES-III value on the asymmetry parameter α = 0.750 ± 0.010.</footnote>

<footnote n="1">¹ The tabulated result assumes the weak-magnetism coupling w ≡ g<sub>W</sub>(0)/g<sub>V</sub>(0) to be 0.97, as given by the CVC hypothesis and as assumed by the other listed measurements. However, DWORKIN 90 measures w to be 0.15 ± 0.30, and then g<sub>A</sub>/g<sub>V</sub> = -0.731 ± 0.016.</footnote>

<footnote n="2">² This experiment measures only the absolute value of g<sub>A</sub>/g<sub>V</sub>.</footnote>
<table><tr><td>LINDQUIST</td><td>77</td><td>PR D16 2104</td><td>J. Lindquist et al.</td><td>(EFL OSU, ANL)</td></tr><tr><td>Also</td><td></td><td>JP G2 L211</td><td>J. Lindquist et al.</td><td>(EFL, WUSL, OSU+)</td></tr><tr><td>ZECH</td><td>77</td><td>NP B124 413</td><td>G. Zech et al.</td><td>(SIEG, CERN, DORT, HEIDH)</td></tr><tr><td>BUNCE</td><td>76</td><td>PRL 36 1113</td><td>G.R.M. Bunce et al.</td><td>(WISC, MICH, RUTG)</td></tr><tr><td>ASTBURY</td><td>75</td><td>NP B99 30</td><td>P. Astbury et al.</td><td>(LOIC, CERN, ETH+)</td></tr><tr><td>CLAYTON</td><td>75</td><td>NP B95 130</td><td>E.F. Clayton et al.</td><td>(LOIC, RHEL)</td></tr><tr><td>ALTHOFF</td><td>73</td><td>PL 43B 237</td><td>K.H. Althoff et al.</td><td>(CERN, HEID)</td></tr><tr><td>ALTHOFF</td><td>73B</td><td>NP B66 29</td><td>K.H. Althoff et al.</td><td>(CERN, HEID)</td></tr><tr><td>KATZ</td><td>73</td><td>Thesis MDDP-TR-74-044</td><td>C.N. Katz</td><td>(UMD)</td></tr><tr><td>POULARD</td><td>73</td><td>PL 46B 135</td><td>G. Poulard, A. Givernaud, A.C. Borg</td><td>(SACL)</td></tr><tr><td>BAGGETT</td><td>72B</td><td>ZPHY 252 362</td><td>M.J. Baggett et al.</td><td>(HEID)</td></tr><tr><td>BAGGETT</td><td>72C</td><td>PL 42B 379</td><td>M.J. Baggett et al.</td><td>(HEID)</td></tr><tr><td>CLELAND</td><td>72</td><td>NP B40 221</td><td>W.E. Cleland et al.</td><td>(CERN, GEVA, LUND)</td></tr><tr><td>HYMAN</td><td>72</td><td>PR D5 1063</td><td>L.G. Hyman et al.</td><td>(ANL, CMU)</td></tr><tr><td>ALTHOFF</td><td>71</td><td>PL 37B 531</td><td>K.H. Althoff et al.</td><td>(CERN, HEID)</td></tr><tr><td>BALTAY</td><td>71B</td><td>PR D4 670</td><td>C. Baltay et al.</td><td>(COLU, BING)</td></tr><tr><td>BARONI</td><td>71</td><td>LNC 2 1256</td><td>G. Baroni, S. Pettera, G. Romano</td><td>(ROMA)</td></tr><tr><td>CANTER</td><td>71</td><td>PRL 26 868</td><td>J. Canter et al.</td><td>(STON, COLU)</td></tr><tr><td>CANTER</td><td>71B</td><td>PRL 27 59</td><td>J. Canter et al.</td><td>(STON, COLU)</td></tr><tr><td>DAHL-JENSEN</td><td>71</td><td>NC 3A 1</td><td>E. Dahl-Jensen et al.</td><td>(CERN, ANKA, LAUS+)</td></tr><tr><td>LINDQUIST</td><td>71</td><td>PRL 27 612</td><td>J. Lindquist et al.</td><td>(EFL, WUSL, OSU+)</td></tr><tr><td>OLSEN</td><td>70</td><td>PRL 24 843</td><td>S.L. Olsen et al.</td><td>(WISC, MICH)</td></tr><tr><td>DAUBER</td><td>69</td><td>PR 179 1262</td><td>P.M. Dauber et al.</td><td>(LRL)</td></tr><tr><td>DOYLE</td><td>69</td><td>Thesis UCRL 18139</td><td>J.C. Doyle</td><td>(LRL)</td></tr><tr><td>MALONEY</td><td>69</td><td>PRL 23 425</td><td>J.E. Maloney, B. Sechi-Zorn</td><td>(UMD)</td></tr><tr><td>GRIMM</td><td>68</td><td>NC 54A 187</td><td>H.J. Grimm</td><td>(HEID)</td></tr><tr><td>HEPP</td><td>68</td><td>ZPHY 214 71</td><td>V. Hepp, H. Schleich</td><td>(HEID)</td></tr><tr><td>BADIER</td><td>67</td><td>PL 25B 152</td><td>J. Badier et al.</td><td>(EPOL)</td></tr><tr><td>MAYEUR</td><td>67</td><td>U Lib, Brux, Bul. 32</td><td>C. Mayeur, E. Tompa, J.H. Wickens</td><td>(BELG, LUND)</td></tr><tr><td>OVERSETH</td><td>67</td><td>PRL 19 391</td><td>O.E. Overseth, R.F. Roth</td><td>(MICH, PRIN)</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>BURAN</td><td>66</td><td>PL 20 318</td><td>T. Buran et al.</td><td>(OSLO)</td></tr><tr><td>CHIEN</td><td>66</td><td>PR 192 1171</td><td>C.Y. Chien et al.</td><td>(YALE, BNL)</td></tr><tr><td>ENGELMANN</td><td>66</td><td>NC 45A 1388</td><td>R. Engelmann et al.</td><td>(HEID, REHO)</td></tr><tr><td>GIBSON</td><td>66</td><td>NC 45A 882</td><td>W.M. Gibson, K. Green</td><td>(BRIS)</td></tr><tr><td>LONDON</td><td>66</td><td>PR 143 1034</td><td>G.W. London et al.</td><td>(BNL, SYRA)</td></tr><tr><td>SCHMIDT</td><td>65</td><td>PR 140 B1328</td><td>P. Schmidt</td><td>(COLU)</td></tr><tr><td>BAGLIN</td><td>64</td><td>NC 35 977</td><td>C. Baglin et al.</td><td>(EPOL, CERN, LOUC, RHEL+)</td></tr><tr><td>HUBBARD</td><td>64</td><td>PR 135 B183</td><td>J.R. Hubbard et al.</td><td>(LRL)</td></tr><tr><td>LIND</td><td>64</td><td>PR 135 B1483</td><td>V.G. Lind et al.</td><td>(WISC)</td></tr><tr><td>RONNE</td><td>64</td><td>PL 11 357</td><td>B.E. Ronne et al.</td><td>(CERN, EPOL, LOUC+)</td></tr><tr><td>SCHWARTZ</td><td>64</td><td>Thesis UCRL 11360</td><td>J.A. Schwartz</td><td>(LRL)</td></tr><tr><td>BHOWMIK</td><td>63</td><td>NC 28 1494</td><td>B. Bhowmik, D.P. Goyal</td><td>(DELH)</td></tr><tr><td>BLOCK</td><td>63</td><td>PR 130 766</td><td>M.M. Block et al.</td><td>(NWES, BGNA, SYRA+)</td></tr><tr><td>BROWN</td><td>63</td><td>PR 130 769</td><td>J.L. Brown et al.</td><td>(LRL, MICH)</td></tr><tr><td>CHRETIEN</td><td>63</td><td>PR 131 2208</td><td>M. Chretien et al.</td><td>(BRAN, BROW, HARV+)</td></tr><tr><td>CRONIN</td><td>63</td><td>PR 129 1795</td><td>J.W. Cronin, O.E. Overseth</td><td>(PRIN)</td></tr><tr><td>ELY</td><td>63</td><td>PR 131 868</td><td>R.P. Ely 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><tr><td>CORK</td><td>60</td><td>PR 120 1000</td><td>B. Cork et al.</td><td>(LRL, PRIN, BNL)</td></tr><tr><td>CRAWFORD</td><td>59B</td><td>PRL 2 266</td><td>F.S. Crawford et al.</td><td>(LRL)</td></tr></table>

See the related review(s):

Λ and Σ Resonances

$$ \Lambda(1380) 1/2^{-} $$

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

OMITTED FROM SUMMARY TABLE

See the related review on "Pole Structure of the Λ(1405) Region."

Λ(1380) POLE POSITION

REAL PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th></tr></thead><tbody><tr><td>1325 ± 15</td><td>1 MAI</td><td>15 DPWA</td></tr><tr><td>1330 <sup>+4</sup><sub>-5</sub></td><td>2 MAI</td><td>15 DPWA</td></tr><tr><td>1388 ± 9</td><td>GUO</td><td>13 DPWA</td></tr><tr><td>1381 <sup>+18</sup><sub>-6</sub></td><td>IKEDA</td><td>12 DPWA</td></tr></tbody></table>

¹Solution number 4.

²Solution number 2.

−2×IMAGINARY PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th></tr></thead><tbody><tr><td>180 <sup>+24</sup><sub>-36</sub></td><td>1 MAI</td><td>15 DPWA</td></tr><tr><td>112 <sup>+34</sup><sub>-22</sub></td><td>2 MAI</td><td>15 DPWA</td></tr><tr><td>228 <sup>+48</sup><sub>-50</sub></td><td>GUO</td><td>13 DPWA</td></tr><tr><td>162 <sup>+38</sup><sub>-16</sub></td><td>IKEDA</td><td>12 DPWA</td></tr></tbody></table>

¹Solution number 4.

²Solution number 2.

Λ(1380) REFERENCES

<table><tr><td>MAI</td><td>15</td><td>EPJ A51 30</td><td>M. Mai, U.-G. Meissner</td><td>(BONN, JULI)</td></tr><tr><td>GUO</td><td>13</td><td>PR C87 035202</td><td>Z.-H. Guo, J. Offer</td><td></td></tr><tr><td>IKEDA</td><td>12</td><td>NP A881 98</td><td>Y. Ikeda, T. Hyodo, W. Weise</td><td>(TUM, RIKEN, TINT)</td></tr></table>

$$ \Lambda(1405) 1/2^{-} $$

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

In the 1998 Note on the Λ(1405) in PDG 98, R.H. Dalitz discussed the S-shaped cusp behavior of the intensity at the N-K threshold observed in THOMAS 73 and HEMINGWAY 85. He commented that this behavior "is characteristic of S-wave coupling; the other below threshold hyperon, the Σ(1385), has no such threshold distortion because its N-K coupling is P-wave. For Λ(1405) this asymmetry is the sole direct evidence that $J^P = 1/2^{-}$."

A recent measurement by the CLAS collaboration, MORIYA 14, definitively established the long-assumed $J^P = 1/2^-$ spin-parity assignment of the Λ(1405). The experiment produced the Λ(1405) spin-polarized in the photoproduction process $\gamma p \to K^+ \Lambda(1405)$ and measured the decay of the Λ(1405) (polarized) $\to \Sigma^+(\text{polarized})\pi^-$. The observed isotropic decay of Λ(1405) is consistent with spin $J = 1/2$. The polarization transfer to the $\Sigma^+(\text{polarized})$ direction revealed negative parity, and thus established $J^P = 1/2^-$.

See the related review(s):

Pole Structure of the Λ(1405) Region

Λ(1405) POLE POSITION

REAL PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th></tr></thead><tbody><tr><td>1417.7 <sup>+6.0</sup><sub>-1.4</sub></td><td>AIKAWA</td><td>23 DPWA</td></tr><tr><td>1429 <sup>+8</sup><sub>-7</sub></td><td>1 MAI</td><td>15 DPWA</td></tr><tr><td>1434 ± 2</td><td>2 MAI</td><td>15 DPWA</td></tr><tr><td>1421 <sup>+3</sup><sub>-2</sub></td><td>GUO</td><td>13 DPWA</td></tr><tr><td>1424 <sup>+7</sup><sub>-23</sub></td><td>IKEDA</td><td>12 DPWA</td></tr></tbody></table>

¹Solution number 4.

²Solution number 2.

−2×IMAGINARY PART

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th></tr></thead><tbody><tr><td>52.2 <sup>+12.0</sup><sub>-15.8</sub></td><td>AIKAWA</td><td>23 DPWA</td></tr><tr><td>24 <sup>+4</sup><sub>-6</sub></td><td>1 MAI</td><td>15 DPWA</td></tr><tr><td>20 <sup>+4</sup><sub>-2</sub></td><td>2 MAI</td><td>15 DPWA</td></tr><tr><td>38 <sup>+16</sup><sub>-10</sub></td><td>GUO</td><td>13 DPWA</td></tr><tr><td>52 <sup>+6</sup><sub>-28</sub></td><td>IKEDA</td><td>12 DPWA</td></tr></tbody></table>

¹Solution number 4.

²Solution number 2.

Λ(1405) MASS

PRODUCTION EXPERIMENTS

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5"><strong>1405.1 <sup>+1.3</sup><sub>-1.0</sub> OUR AVERAGE</strong></td></tr><tr><td>1405</td><td><sup>+11</sup><sub>-9</sub></td><td>HASSANVAND 13</td><td>SPEC</td><td>$p \to p \Lambda(1405) K^+$</td></tr><tr><td>1405</td><td><sup>+1.4</sup><sub>-1.0</sub></td><td>ESMAILI 10</td><td>RVUE</td><td>$^4\text{He} K^- \to \Sigma^\pm \pi^\mp X$ at rest</td></tr><tr><td>1406.5 ± 4.0</td><td></td><td>1 DALITZ 91</td><td></td><td>M-matrix fit</td></tr><tr><td>1391 ± 1</td><td>700</td><td>1 HEMINGWAY 85</td><td>HBC</td><td>$K^- p 4.2 \text{ GeV/c}$</td></tr><tr><td>~ 1405</td><td>400</td><td>2 THOMAS 73</td><td>HBC</td><td>$\pi^- p 1.69 \text{ GeV/c}$</td></tr><tr><td>1405</td><td>120</td><td>BARBARO-... 68b</td><td>DBC</td><td>$K^- d 2.1-2.7 \text{ GeV/c}$</td></tr><tr><td>1400 ± 5</td><td>67</td><td>BIRMINGHAM 66</td><td>HBC</td><td>$K^- p 3.5 \text{ GeV/c}$</td></tr><tr><td>1382 ± 8</td><td></td><td>ENGLER 65</td><td>DHBC</td><td>$\pi^- p, \pi^+ d 1.68 \text{ GeV/c}$</td></tr><tr><td>1400 ± 24</td><td></td><td>MUSGRAVE 65</td><td>HBC</td><td>$\bar{p} p 3-4 \text{ GeV/c}$</td></tr><tr><td>1410</td><td></td><td>ALEXANDER 62</td><td>HBC</td><td>$\pi^- p 2.1 \text{ GeV/c}$</td></tr><tr><td>1405</td><td></td><td>ALSTON 62</td><td>HBC</td><td>$K^- p 1.2-0.5 \text{ GeV/c}$</td></tr><tr><td>1405</td><td></td><td>ALSTON 61b</td><td>HBC</td><td>$K^- p 1.15 \text{ GeV/c}$</td></tr></tbody></table>

¹DALITZ 91 fits the HEMINGWAY 85 data.

²THOMAS 73 data is fit by CHAO 73 (see next section).
## EXTRAPOLATIONS BELOW $N\bar{K}$ THRESHOLD

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1407.56 or 1407.50</td><td>1 KIMURA</td><td>00</td><td>potential model</td></tr><tr><td>1411</td><td>2 MARTIN</td><td>81</td><td>K-matrix fit</td></tr><tr><td>1406</td><td>3 CHAO</td><td>73</td><td>DPWA 0-range fit (sol. B)</td></tr><tr><td>1421</td><td>MARTIN</td><td>70</td><td>RVUE Constant K-matrix</td></tr><tr><td>1416 ± 4</td><td>MARTIN</td><td>69</td><td>HBC Constant K-matrix</td></tr><tr><td>1403 ± 3</td><td>KIM</td><td>67</td><td>HBC K-matrix fit</td></tr><tr><td>1407.5 ± 1.2</td><td>4 KITTEL</td><td>66</td><td>HBC 0-effective-range fit</td></tr><tr><td>1410.7 ± 1.0</td><td>KIM</td><td>65</td><td>HBC 0-effective-range fit</td></tr><tr><td>1409.6 ± 1.7</td><td>4 SAKITT</td><td>65</td><td>HBC 0-effective-range fit</td></tr></tbody></table>

¹ The KIMURA 00 values are from fits A and B from a coupled-channel potential model using low-energy $N\bar{K}$ and $\Sigma\pi$ data, kaonic-hydrogen x-ray measurements, and our A(1405) mass and width. The results bear mainly on the *nature* of the A(1405): three-quark state or $N\bar{K}$ bound state.

² The MARTIN 81 fit includes the $K^{\pm}p$ forward scattering amplitudes and the dispersion relations they must satisfy.

³ See also the accompanying paper of THOMAS 73.

⁴ Data of SAKITT 65 are used in the fit by KITTEL 66.

## A(1405) WIDTH

### PRODUCTION EXPERIMENTS

<table><thead><tr><th>VALUE (MeV)</th><th>EVT'S</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5"><strong>50.5±2.0 OUR AVERAGE</strong></td></tr><tr><td>62 ± 10</td><td>1 HASSANVAND 13</td><td>SPEC</td><td>pp → pA(1405) K<sup>+</sup></td><td></td></tr><tr><td>50 ± 2</td><td>1 DALITZ 91</td><td></td><td>M-matrix fit</td><td></td></tr><tr><td colspan="5"><strong>• • • We do not use the following data for averages, fits, limits, etc. • • •</strong></td></tr><tr><td>24 + 4</td><td>ESMAILI 10</td><td>RVUE</td><td><sup>4</sup>He K<sup>-</sup> → Σ<sup>±</sup>π<sup>∓</sup>X at rest</td><td></td></tr><tr><td>- 3</td><td></td><td></td><td></td><td></td></tr><tr><td>32 ± 1</td><td>700</td><td>1 HEMINGWAY 85</td><td>HBC K<sup>-</sup> p 4.2 GeV/c</td><td></td></tr><tr><td>45 to 55</td><td>400</td><td>2 THOMAS 73</td><td>HBC π<sup>-</sup> p 1.69 GeV/c</td><td></td></tr><tr><td>35</td><td>120</td><td>BARBARO-... 68B</td><td>DBC K<sup>-</sup> d 2.1-2.7 GeV/c</td><td></td></tr><tr><td>50 ± 10</td><td>67</td><td>BIRMINGHAM 66</td><td>HBC K<sup>-</sup> p 3.5 GeV/c</td><td></td></tr><tr><td>89 ± 20</td><td></td><td>ENGLER 65</td><td>HDBC</td><td></td></tr><tr><td>60 ± 20</td><td></td><td>MUSGRAVE 65</td><td>HBC</td><td></td></tr><tr><td>35 ± 5</td><td></td><td>ALEXANDER 62</td><td>HBC</td><td></td></tr><tr><td>50</td><td></td><td>ALSTON 62</td><td>HBC</td><td></td></tr><tr><td>20</td><td></td><td>ALSTON 61B</td><td>HBC</td><td></td></tr></tbody></table>

¹ DALITZ 91 fits the HEMINGWAY 85 data.

² THOMAS 73 data is fit by CHAO 73 (see next section).

## EXTRAPOLATIONS BELOW $N\bar{K}$ THRESHOLD

<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>• • • We do not use the following data for averages, fits, limits, etc. • • •</strong></td></tr><tr><td>50.24 or 50.26</td><td>1 KIMURA</td><td>00</td><td>potential model</td></tr><tr><td>30</td><td>2 MARTIN</td><td>81</td><td>K-matrix fit</td></tr><tr><td>55</td><td>3,4 CHAO</td><td>73</td><td>DPWA 0-range fit (sol. B)</td></tr><tr><td>20</td><td>MARTIN</td><td>70</td><td>RVUE Constant K-matrix</td></tr><tr><td>29 ± 6</td><td>MARTIN</td><td>69</td><td>HBC Constant K-matrix</td></tr><tr><td>50 ± 5</td><td>KIM</td><td>67</td><td>K-matrix fit</td></tr><tr><td>34.1 ± 4.1</td><td>5 KITTEL</td><td>66</td><td>HBC</td></tr><tr><td>37.0 ± 3.2</td><td>KIM</td><td>65</td><td>HBC</td></tr><tr><td>28.2 ± 4.1</td><td>5 SAKITT</td><td>65</td><td>HBC</td></tr></tbody></table>

¹ The KIMURA 00 values are from fits A and B from a coupled-channel potential model using low-energy $N\bar{K}$ and $\Sigma\pi$ data, kaonic-hydrogen x-ray measurements, and our A(1405) mass and width. The results bear mainly on the *nature* of the A(1405): three-quark state or $N\bar{K}$ bound state.

² The MARTIN 81 fit includes the $K^{\pm}p$ forward scattering amplitudes and the dispersion relations they must satisfy.

³ An asymmetric shape, with $\Gamma/2 = 41$ MeV below resonance, 12 MeV above.

⁴ See also the accompanying paper of THOMAS 73.

⁵ Data of SAKITT 65 are used in the fit by KITTEL 66.

## A(1405) 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> Σπ</td><td>100 %</td></tr><tr><td>Γ<sub>2</sub> Λγ</td><td></td></tr><tr><td>Γ<sub>3</sub> Σ<sup>0</sup>γ</td><td></td></tr><tr><td>Γ<sub>4</sub> N<span style="text-decoration: overline">K</span></td><td></td></tr></tbody></table>

## A(1405) PARTIAL WIDTHS

<table><thead><tr><th>Γ(Λγ)</th><th>DOCUMENT ID</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="3"><strong>• • • We do not use the following data for averages, fits, limits, etc. • • •</strong></td></tr><tr><td>27 ± 8</td><td>BURKHARDT 91</td><td>Isobar model fit</td></tr></tbody></table>

<table><thead><tr><th>Γ(Σ<sup>0</sup>γ)</th><th>DOCUMENT ID</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="3"><strong>• • • We do not use the following data for averages, fits, limits, etc. • • •</strong></td></tr><tr><td>10 ± 4 or 23 ± 7</td><td>BURKHARDT 91</td><td>Isobar model fit</td></tr></tbody></table>

## A(1405) BRANCHING RATIOS

$$ \frac{\Gamma(N\bar{K})/\Gamma(\Sigma\pi)}{\Gamma_4/\Gamma_1} $$

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

<3 95 HEMINGWAY 85 HBC K<sup>-</sup> p 4.2 GeV/c

## A(1405) REFERENCES

<table><tbody><tr><td>AIKAWA</td><td>23</td><td>PL B837 137637</td><td>S. Aikawa et al. (J-PARC E31 Collab.)</td></tr><tr><td>MAI</td><td>15</td><td>EPJ A51 30</td><td>M. Mai, U.-G. Meissner (BONN, JULI)</td></tr><tr><td>MORIYA</td><td>14</td><td>PRL 112 082004</td><td>K. Moriya et al. (CLAS Collab.) JP</td></tr><tr><td>GUO</td><td>13</td><td>PR C87 035202</td><td>Z.-H. Guo, J. Oller</td></tr><tr><td>HASSANVAND</td><td>13</td><td>PR C87 055202</td><td>M. Hassanvand et al.</td></tr><tr><td>IKEDA</td><td>12</td><td>NP A881 98</td><td>M. Hassanvand et al.</td></tr><tr><td>ESMAILI</td><td>10</td><td>PL B686 23</td><td>Y. Ikeda, T. Hyodo, W. Weise (TUM, RIKEN, TINT)</td></tr><tr><td>KIMURA</td><td>00</td><td>PR C62 015206</td><td>J. Esmaili, Y. Akaiishi, T. Yamazaki (RIKEN, ISUT+)</td></tr><tr><td>PDG</td><td>98</td><td>EPJ C3 1</td><td>C. Caso et al. (PDG Collab.)</td></tr><tr><td>BURKHARDT</td><td>91</td><td>PR C44 607</td><td>H. Burkhardt, J. Lowe (NOTT, UNM, BIRM)</td></tr><tr><td>DALITZ</td><td>91</td><td>JP G1 289</td><td>R.H. Dalitz, A. Deloff (OXFTP, WINNEP)</td></tr><tr><td>HEMINGWAY</td><td>85</td><td>NP B253 742</td><td>R.J. Hemingway (CERN) J</td></tr><tr><td>MARTIN</td><td>81</td><td>NP B179 33</td><td>A.D. Martin (DURH)</td></tr><tr><td>CHAO</td><td>73</td><td>NP B56 46</td><td>Y.A. Chao et al. (RHEL, CMU, LOUC)</td></tr><tr><td>THOMAS</td><td>73</td><td>NP B56 15</td><td>D.W. Thomas et al. (CMU) J</td></tr><tr><td>MARTIN</td><td>73</td><td>NP B16 479</td><td>A.D. Martin, G.G. Ross (DURH)</td></tr><tr><td>MARTIN</td><td>69</td><td>PR 183 1352</td><td>B.R. Martin, M. Sakitt (LOUC, BNL)</td></tr><tr><td>Also</td><td></td><td>PR 183 1345</td><td>B.R. Martin, M. Sakitt (LOUC, BNL)</td></tr><tr><td>BARBARO-...</td><td>68B</td><td>PRL 21 573</td><td>A. Barbaro-Galtieri et al. (LRL, SLAC)</td></tr><tr><td>KIM</td><td>67</td><td>PRL 19 1074</td><td>J.K. Kim (YALE)</td></tr><tr><td>BIRMINGHAM</td><td>66</td><td>PR 152 1148</td><td>M. Haque et al. (BIRM, GLAS, LOIC, OXF+)</td></tr><tr><td>KITTEL</td><td>66</td><td>PL 21 349</td><td>W. Kittel, G. Otter, I. Wacek (VIEN)</td></tr><tr><td>ENGLER</td><td>65</td><td>PR 15 224</td><td>A. Engler et al. (CMU, BNL) J</td></tr><tr><td>KIM</td><td>65</td><td>PR 14 29</td><td>J.K. Kim (COLU)</td></tr><tr><td>MUSGRAVE</td><td>65</td><td>NC 35 735</td><td>B. Musgrave et al. (BIRM, CERN, EPL+)</td></tr><tr><td>SAKITT</td><td>65</td><td>PR 139 B719</td><td>M. Sakitt et al. (UMD, LRL)</td></tr><tr><td>ALEXANDER</td><td>62</td><td>PL 137 47</td><td>G. Alexander et al. (LRL) J</td></tr><tr><td>ALSTON</td><td>62</td><td>CERN Conf. 311</td><td>M.H. Alston et al. (LRL) J</td></tr><tr><td>ALSTON</td><td>61B</td><td>PRL 6 698</td><td>M.H. Alston et al. (LRL) J</td></tr></tbody></table>

## OTHER RELATED PAPERS

<table><tbody><tr><td>IWASAKI</td><td>97</td><td>PRL 78 3067</td><td>M. Iwasaki et al. (KEK 228 Collab.)</td></tr><tr><td>FINK</td><td>90</td><td>PR C41 2720</td><td>P.J.Jr. Fink, Fink et al. (IBMY, ORST, ANSJM)</td></tr><tr><td>LEINWEBER</td><td>90</td><td>ANP 198 203</td><td>D.B. Leinwebber (MCMCS)</td></tr><tr><td>MUELLER-GR-... 90</td><td>NP A513 557</td><td>A. Mueller-Groeling, K. Holinde, J. Speth (JULI)</td></tr><tr><td>BARRETT</td><td>89</td><td>NC 102A 179</td><td>R.C. Barrett (SURR)</td></tr><tr><td>BATTY</td><td>89</td><td>NC 102A 255</td><td>C.J. Batty, A. Gal (RAL, HEBR)</td></tr><tr><td>CAPSTICK</td><td>89</td><td>Excited Baryons 88, p.32 S. Capstick</td><td>(GUEL, BIRM)</td></tr><tr><td>LOWE</td><td>89</td><td>NC 102A 167</td><td>J. Lowe (BIRM)</td></tr><tr><td>WHITEHOUSE 89</td><td>PR C63 1352</td><td>D.A. Whitehouse et al. (BIRM, BOST, BRCO+)</td></tr><tr><td>SIEGEL</td><td>89</td><td>PR C38 2221</td><td>P.B. Siegel, W. Weise (REGE)</td></tr><tr><td>WORKMAN</td><td>88</td><td>PR D37 3117</td><td>R.L. Workman, H.W. Fearing (TRIU)</td></tr><tr><td>SCHNICK</td><td>87</td><td>PR 50 1719</td><td>J. Schnick, R.H. Landau (ORST)</td></tr><tr><td>CAPSTICK</td><td>86</td><td>PR D34 2809</td><td>S. Capstick, N. Isgur (TNTO)</td></tr><tr><td>JENNINGS</td><td>86</td><td>PR B176 229</td><td>B.K. Jennings (TRIU)</td></tr><tr><td>MALTMAN</td><td>86</td><td>PR D34 1372</td><td>K. Maltman, N. Isgur (LANL, TNTO)</td></tr><tr><td>ZHONG</td><td>86</td><td>PL B171 471</td><td>Y.S. Zhong et al. (ADLD, TRIU, SURR)</td></tr><tr><td>BURKHARDT</td><td>85</td><td>NP A440 653</td><td>H. Burkhardt, J. Lowe, A.S. Rosenthal (NOTT+)</td></tr><tr><td>DAREWYCH</td><td>85</td><td>PR D32 1765</td><td>J.W. Darewych, R. Koniuk, N. Isgur (YORKC, TNTO)</td></tr><tr><td>VEIT</td><td>85</td><td>PR D31 1033</td><td>E.A. Veit et al. (TRIU, ADLD, SURR)</td></tr><tr><td>KIANG</td><td>84</td><td>PR C30 1638</td><td>PR D31 1033 (TRIU, ADLD, SURR)</td></tr><tr><td>MILLER</td><td>84</td><td>Conference paper</td><td>(DALH, MCMS)</td></tr><tr><td>Conf. Intersections between Particle and Nuclear Physics, p. 783</td><td></td><td>D.J. Miller (LOUC)</td><td></td></tr><tr><td>VANDIJK</td><td>84</td><td>PR D30 937</td><td>W. van Dijk (MCMS)</td></tr><tr><td>VEIT</td><td>84</td><td>PR 137B 415</td><td>E.A. Veit et al. (TRIU, SURR, CERN)</td></tr><tr><td>DALITZ</td><td>82</td><td>Heid. Conf.</td><td>R.H. Dalitz et al. (OXFTP)</td></tr><tr><td>Heidelberg Conf., p. 201</td><td></td><td></td><td></td></tr><tr><td>DALITZ</td><td>81</td><td>Kao Conf.</td><td>R.H. Dalitz, J.G. McGinley (OXFTP)</td></tr><tr><td>MARTIN</td><td>81B</td><td>Kao Conf.</td><td>Low and Intermediate Energy Kaon-Nucleon Physics, p.381 (DURH)</td></tr><tr><td>MARTIN</td><td>81B</td><td>Kao Conf.</td><td>Low and Intermediate Energy Kaon-Nucleon Physics, p. 97 (DURH)</td></tr><tr><td>OADES</td><td>77</td><td>NC 42A 462</td><td>G.C. Oades, G. Rasche (AARH, ZURI)</td></tr><tr><td>SHAW</td><td>73</td><td>Purdue Conf. 417</td><td>G.L. Shaw (UCI)</td></tr><tr><td>BARBARO-... 72</td><td>LB1 559</td><td>A. Barbaro-Galtieri</td><td>A. Barbaro-Galtieri</td></tr><tr><td>DOBSON</td><td>72</td><td>PL B32 3256</td><td>P.N. Dobson, R. McElhaney (HAWA)</td></tr><tr><td>RAJASEKAR</td><td>72</td><td>PR D5 610</td><td>G. Rajasekaran (TATA)</td></tr><tr><td colspan="4">Earlier papers also cited in RAJASEKARAN 72.</td></tr><tr><td>CLINE</td><td>71</td><td>PRL 26 1194</td><td>D. Cline, R. Laumann, J. Mapp (WISC)</td></tr><tr><td>MILLIN</td><td>67</td><td>PR 35B 612</td><td>A.D. Martin, A.D. Martin, G.G. Ross (DURH, LOUC+)</td></tr><tr><td>DALITZ</td><td>67</td><td>PR 153 1617</td><td>R.H. Dalitz, T.C. Wong, G. Rajasekaran (OXFTP+)</td></tr><tr><td>DONALD</td><td>66</td><td>PR 22 711</td><td>R.A. Donald et al. (LIVP)</td></tr><tr><td>KADYK</td><td>66</td><td>PRL 17 599</td><td>J.A. Kadyk et al. (LRL)</td></tr><tr><td>ABRAMS</td><td>65</td><td>PR 139 B454</td><td>G.S. Abrams, B. Sechi-Zorn (UMD)</td></tr></tbody></table>

$$ \Gamma(1520) 3/2^{-} $$

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

Discovered by FERRO-LUZZI 62; the elaboration in WATSON 63 is the classic paper on the Breit-Wigner analysis of a multichannel resonance.

The measurements of the mass, width, and elasticity published before 1975 are now obsolete and have been omitted. They were last listed in our 1982 edition Physics Letters 111B 1 (1982).

Production and formation experiments agree quite well, so they are listed together here.

## A(1520) POLE POSITION

<table><thead><tr><th>REAL PART</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1517 to 1518 (≈ 1517.5) OUR ESTIMATE</td><td></td><td></td><td></td></tr><tr><td>1517.5±0.4 OUR AVERAGE</td><td></td><td></td><td></td></tr><tr><td>1517.5±0.4</td><td>SARANTSEV 19</td><td>DPWA N<sup>3</sup> multichannel</td><td></td></tr><tr><td>1517 +4</td><td>1 KAMANO 15</td><td>DPWA N<sup>3</sup> multichannel</td><td></td></tr></tbody></table>
• • • We do not use the following data for averages, fits, limits, etc. • • •

<table><tr><td>1518</td><td>ZHANG</td><td>13A</td><td>DPWA</td><td>K̄N multichannel</td></tr><tr><td>1518.8</td><td>QIANG</td><td>10</td><td>SPEC</td><td>ep → e'K<sup>+</sup>X (fit to X)</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

### -2xIMAGINARY 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>14 to 18 (≈ 16) OUR ESTIMATE</strong></td></tr><tr><td colspan="4"><strong>15.3 ± 0.9 OUR AVERAGE</strong></td></tr><tr><td>15.3 ± 0.9</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td>15 ± 10/8</td><td>¹ KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

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

<table><tr><td>16</td><td>ZHANG</td><td>13A</td><td>DPWA K̄N multichannel</td></tr><tr><td>17.2</td><td>QIANG</td><td>10</td><td>SPEC</td><td>ep → e'K<sup>+</sup>X (fit to X)</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

## Λ(1520) POLE RESIDUES

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

### Normalized residue in N̄K → Λ(1520) → N̄K

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.45 ±0.01</td><td>-10 ± 3</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

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

<table><tr><td>0.431</td><td>-11</td><td>¹ KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̄K → Λ(1520) → 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>0.44 ±0.01</td><td>-15 ± 3</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

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

<table><tr><td>0.435</td><td>-10</td><td>¹ KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̄K → Λ(1520) → 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>0.013 ±0.003</td><td>116 ± 3</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

### Normalized residue in N̄K → Λ(1520) → Σ(1385)π, S-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>0.431</td><td>-123</td><td>¹ KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

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

<table><tr><td>0.0141</td><td>122</td><td>¹ KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in N̄K → Λ(1520) → 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>0.0141</td><td>122</td><td>¹ KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></tbody></table>

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

<table><tr><td>0.0141</td><td>122</td><td>¹ KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

## Λ(1520) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5"><strong>1518 to 1520 (≈ 1519) OUR ESTIMATE</strong></td></tr><tr><td colspan="5"><strong>1519.42 ± 0.19 OUR AVERAGE</strong></td></tr><tr><td>1518.5 ± 0.5</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td><td></td></tr><tr><td>1519.6 ± 0.5</td><td>ZHANG</td><td>13A</td><td>DPWA K̄N multichannel</td><td></td></tr><tr><td>1520.4 ± 0.6 ± 1.5</td><td>QIANG</td><td>10</td><td>SPEC</td><td>ep → e'K<sup>+</sup>X (fit to X)</td></tr><tr><td>1517.3 ± 1.5</td><td>BARBER</td><td>80d</td><td>SPEC</td><td>γp → Λ(1520) K<sup>+</sup></td></tr><tr><td>1517.8 ± 1.2</td><td>BARLAG</td><td>79</td><td>HBC</td><td>K<sup>-</sup> p 4.2 GeV/c</td></tr><tr><td>1520.0 ± 0.5</td><td>ALSTON...</td><td>78</td><td>DPWA</td><td>K̄N → K̄N</td></tr><tr><td>1519.7 ± 0.3</td><td>CAMERON</td><td>77</td><td>HBC</td><td>K<sup>-</sup> p 0.96-1.36 GeV/c</td></tr><tr><td>1519 ± 1</td><td>GOPAL</td><td>77</td><td>DPWA</td><td>K̄N multichannel</td></tr><tr><td>1519.4 ± 0.3</td><td>CORDEN</td><td>75</td><td>DBC</td><td>K<sup>-</sup> d 1.4-1.8 GeV/c</td></tr></tbody></table>

## Λ(1520) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>EVTS</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="5"><strong>15 to 17 (≈ 16) OUR ESTIMATE</strong></td></tr><tr><td colspan="5"><strong>15.73 ± 0.26 OUR AVERAGE</strong></td></tr><tr><td>15.7 ± 1.0</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td><td></td></tr><tr><td>17 ± 1</td><td>ZHANG</td><td>13A</td><td>DPWA K̄N multichannel</td><td></td></tr><tr><td>18.6 ± 1.9 ± 1.0</td><td>QIANG</td><td>10</td><td>SPEC</td><td>ep → e'K<sup>+</sup>X (fit to X)</td></tr><tr><td>16.3 ± 3.3</td><td>BARBER</td><td>80d</td><td>SPEC</td><td>γp → Λ(1520) K<sup>+</sup></td></tr><tr><td>16 ± 1</td><td>GOPAL</td><td>80</td><td>DPWA</td><td>K̄N → K̄N</td></tr><tr><td>14 ± 3</td><td>1 BARLAG</td><td>79</td><td>HBC</td><td>K<sup>-</sup> p 4.2 GeV/c</td></tr><tr><td>15.4 ± 0.5</td><td>ALSTON...</td><td>78</td><td>DPWA</td><td>K̄N → K̄N</td></tr><tr><td>16.3 ± 0.5</td><td>CAMERON</td><td>77</td><td>HBC</td><td>K<sup>-</sup> p 0.96-1.36 GeV/c</td></tr><tr><td>15.0 ± 0.5</td><td>GOPAL</td><td>77</td><td>DPWA</td><td>K̄N multichannel</td></tr><tr><td>15.5 ± 1.6</td><td>CORDEN</td><td>75</td><td>DBC</td><td>K<sup>-</sup> d 1.4-1.8 GeV/c</td></tr></tbody></table>

¹ From the best-resolution sample of Λππ events only.

## Λ(1520) 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></td><td>(45 ± 1) %</td></tr><tr><td>Γ<sub>2</sub></td><td>(42 ± 1) %</td></tr><tr><td>Γ<sub>3</sub></td><td>(10 ± 1) %</td></tr><tr><td>Γ<sub>4</sub></td><td>Σ(1385)π, S-wave</td></tr><tr><td>Γ<sub>5</sub></td><td>Σ(1385)π, D-wave</td></tr><tr><td>Γ<sub>6</sub></td><td>Σ(1385)π</td></tr><tr><td>Γ<sub>7</sub></td><td>Σ(1385)π (→ Λππ)</td></tr><tr><td>Γ<sub>8</sub></td><td>Λ(ππ)S-wave</td></tr><tr><td>Γ<sub>9</sub></td><td>Σππ (0.9 ± 0.1) %</td></tr><tr><td>Γ<sub>10</sub></td><td>Λγ (0.85 ± 0.15) %</td></tr><tr><td>Γ<sub>11</sub></td><td>Σ<sup>0</sup>γ</td></tr></tbody></table>

## Λ(1520) BRANCHING RATIOS

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

<table><thead><tr><th>Γ(N̄K)/Γ<sub>total</sub></th><th>Γ<sub>1</sub>/Γ</th></tr></thead><tbody><tr><td><strong>0.45 to 0.47 OUR ESTIMATE</strong></td><td></td></tr><tr><td>0.45 ± 0.01</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.47 ± 0.04</td><td>ZHANG</td><td>13A</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.47 ± 0.02</td><td>GOPAL</td><td>80</td><td>DPWA K̄N → K̄N</td></tr><tr><td>0.45 ± 0.03</td><td>ALSTON...</td><td>78</td><td>DPWA K̄N → K̄N</td></tr><tr><td>0.448 ± 0.014</td><td>CORDEN</td><td>75</td><td>DBC K<sup>-</sup> d 1.4-1.8 GeV/c</td></tr></tbody></table>

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

<table><tr><td>0.43</td><td>¹ KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.47 ± 0.01</td><td>GOPAL</td><td>77</td><td>DPWA</td><td>See GOPAL 80</td></tr><tr><td>0.42</td><td>MAST</td><td>76</td><td>HBC K<sup>-</sup> p → K̄<sup>0</sup>π</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>Γ(Σπ)/Γ<sub>total</sub></th><th>Γ<sub>2</sub>/Γ</th></tr></thead><tbody><tr><td><strong>0.42 to 0.46 OUR ESTIMATE</strong></td><td></td></tr><tr><td>0.42 ± 0.01</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.47 ± 0.05</td><td>ZHANG</td><td>13A</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.426 ± 0.014</td><td>CORDEN</td><td>75</td><td>DBC K<sup>-</sup> d 1.4-1.8 GeV/c</td></tr><tr><td>0.418 ± 0.017</td><td>BARBARO...</td><td>69b</td><td>HBC K<sup>-</sup> p 0.28-0.45 GeV/c</td></tr></tbody></table>

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

<table><tr><td>0.446</td><td>¹ KAMANO</td><td>15</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.46</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

<table><thead><tr><th>Γ(Σπ)/Γ(N̄K)</th><th>Γ<sub>2</sub>/Γ<sub>1</sub></th></tr></thead><tbody><tr><td><strong>0.9 to 1.0 OUR ESTIMATE</strong></td><td></td></tr><tr><td>0.98 ± 0.03</td><td>¹ GOPAL</td><td>77</td><td>DPWA K̄N multichannel</td></tr><tr><td>0.82 ± 0.08</td><td>BURKHARDT</td><td>69</td><td>HBC K<sup>-</sup> p 0.8-1.2 GeV/c</td></tr><tr><td>1.06 ± 0.14</td><td>SCHEUER</td><td>68</td><td>DBC K<sup>-</sup> N 3 GeV/c</td></tr><tr><td>0.96 ± 0.20</td><td>DAHL</td><td>67</td><td>HBC K<sup>-</sup> p 1.6-4 GeV/c</td></tr><tr><td>0.73 ± 0.11</td><td>DAUBER</td><td>67</td><td>HBC K<sup>-</sup> p 2 GeV/c</td></tr></tbody></table>

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

<table><tr><td>1.06 ± 0.12</td><td>BERTHON</td><td>74</td><td>HBC</td><td>Quasi-2-body σ</td></tr><tr><td>1.72 ± 0.78</td><td>MUSGRAVE</td><td>65</td><td>HBC</td><td></td></tr></table>

¹ The K̄N → Σπ amplitude at resonance is +0.46 ± 0.01.

<table><thead><tr><th>Γ(Λππ)/Γ<sub>total</sub></th><th>Γ<sub>3</sub>/Γ</th></tr></thead><tbody><tr><td><strong>0.09 to 0.11 OUR ESTIMATE</strong></td><td></td></tr><tr><td>0.091 ± 0.006</td><td>CORDEN</td><td>75</td><td>DBC K<sup>-</sup> d 1.4-1.8 GeV/c</td></tr><tr><td>0.11 ± 0.01</td><td>¹ MAST</td><td>73b</td><td>IPWA K<sup>-</sup> p → Λππ</td></tr></tbody></table>

¹ Assumes Γ(N̄K)/Γ<sub>total</sub> = 0.46 ± 0.02.

<table><thead><tr><th>Γ(Λππ)/Γ(N̄K)</th><th>Γ<sub>3</sub>/Γ<sub>1</sub></th></tr></thead><tbody><tr><td><strong>0.18 to 0.22 OUR ESTIMATE</strong></td><td></td></tr><tr><td>0.22 ± 0.03</td><td>BURKHARDT</td><td>69</td><td>HBC K<sup>-</sup> p 0.8-1.2 GeV/c</td></tr><tr><td>0.19 ± 0.04</td><td>SCHEUER</td><td>68</td><td>DBC K<sup>-</sup> N 3 GeV/c</td></tr><tr><td>0.17 ± 0.05</td><td>DAHL</td><td>67</td><td>HBC K<sup>-</sup> p 1.6-4 GeV/c</td></tr><tr><td>0.21 ± 0.18</td><td>DAUBER</td><td>67</td><td>HBC K<sup>-</sup> p 2 GeV/c</td></tr></tbody></table>

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

<table><tr><td>0.27 ± 0.13</td><td>BERTHON</td><td>74</td><td>HBC</td><td>Quasi-2-body σ</td></tr><tr><td>0.2</td><td>KIM</td><td>71</td><td>DPWA</td><td>K-matrix analysis</td></tr></table>

<table><thead><tr><th>Γ(Σπ)/Γ(Λππ)</th><th>Γ<sub>2</sub>/Γ<sub>3</sub></th></tr></thead><tbody><tr><td><strong>3.4 to 4.4 OUR ESTIMATE</strong></td><td></td></tr><tr><td>3.9 ± 1.0</td><td>UHLIG</td><td>67</td><td>HBC K<sup>-</sup> p 0.9-1.0 GeV/c</td></tr><tr><td>3.3 ± 1.1</td><td>BIRMINGHAM</td><td>66</td><td>HBC K<sup>-</sup> p 3.5 GeV/c</td></tr><tr><td>4.5 ± 1.0</td><td>ARMENTEROS65c</td><td></td><td>HBC</td></tr></tbody></table>
Γ(Σ(1385)π, S-wave)/Γ<sub>total</sub> Γ<sub>4</sub>/Γ

DOCUMENT ID TECN COMMENT VALUE

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

0.121 1 KAMANO 15 DPWA K̄N multichannel

¹ From the preferred solution A in KAMANO 15.

Γ(Σ(1385)π, D-wave)/Γ<sub>total</sub> Γ<sub>5</sub>/Γ

DOCUMENT ID TECN COMMENT VALUE

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

0.003 1 KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

Γ(Σ(1385)π)/Γ<sub>total</sub> Γ<sub>6</sub>/Γ

DOCUMENT ID TECN COMMENT VALUE

0.041 ± 0.005 CHAN 72 HBC K⁻p → Λππ

Γ(Σ(1385)π → Λππ)/Γ(Λππ) Γ<sub>7</sub>/Γ<sub>3</sub>

The Λππ mode is largely due to Σ(1385)π. Only the values of (Σ(1385)π) / (Λ2π) given by MAST 73b and CORDEN 75 are based on real 3-body partial-wave analyses. The discrepancy between the two results is essentially due to the different hypotheses made concerning the shape of the (ππ)S-wave state.

DOCUMENT ID TECN COMMENT VALUE

<table><tr><td>0.58 ± 0.22</td><td>CORDEN</td><td>75</td><td>DBC</td><td>K<sup>-</sup> d 1.4-1.8 GeV/c</td></tr><tr><td>0.82 ± 0.10</td><td>1 MAST</td><td>73b</td><td>IPWA</td><td>K<sup>-</sup> p → Λππ</td></tr></table>

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

<table><tr><td>&lt;0.44</td><td>90</td><td>WIELAND</td><td>11</td><td>SPHR</td><td>γp → K<sup>+</sup>Λ(1520)</td></tr><tr><td>0.39 ± 0.10</td><td>2 BURKHARDT</td><td>71</td><td>HBC</td><td>K<sup>-</sup> p → (Λππ)π</td></tr></table>

¹ Both Σ(1385)π D5<sub>03</sub> and Σ(ππ) DP<sub>03</sub> contribute.

² The central bin (1514–1524 MeV) gives 0.74 ± 0.10; other bins are lower by 2-to-5 standard deviations.

Γ(Λ(ππ)S-wave)/Γ(Λππ) Γ<sub>8</sub>/Γ<sub>3</sub>

DOCUMENT ID TECN COMMENT VALUE

0.20 ± 0.08 CORDEN 75 DBC K⁻d 1.4-1.8 GeV/c

Γ(Σππ)/Γ<sub>total</sub> Γ<sub>9</sub>/Γ

DOCUMENT ID TECN COMMENT VALUE

<table><tr><td>0.007</td><td>to 0.011</td><td>OUR ESTIMATE</td><td></td></tr><tr><td>0.007 ± 0.002</td><td>1</td><td>CORDEN</td><td>75</td><td>DBC</td><td>K<sup>-</sup> d 1.4-1.8 GeV/c</td></tr><tr><td>0.0085 ± 0.0006</td><td>2</td><td>MAST</td><td>73</td><td>MPWA</td><td>K<sup>-</sup> p → Σππ</td></tr><tr><td>0.010 ± 0.0015</td><td>BARBARO...</td><td>69b</td><td>HBC</td><td>K<sup>-</sup> p 0.28-0.45 GeV/c</td></tr></table>

¹ Much of the Σππ decay proceeds via Σ(1385)π.

² Assumes Γ(NK̄)/Γ<sub>total</sub> = 0.46.

Γ(Λγ)/Γ<sub>total</sub> Γ<sub>10</sub>/Γ

DOCUMENT ID TECN COMMENT VALUE

<table><tr><td>7</td><td>to 11</td><td>OUR ESTIMATE</td><td></td></tr><tr><td>10.7 ± 2.9<sup>+1.5</sup><sub>-0.4</sub></td><td>32</td><td>TAYLOR</td><td>05</td><td>CLAS</td><td>γp → K<sup>+</sup>Λγ</td></tr><tr><td>10.2 ± 2.1 ± 1.5</td><td>290</td><td>ANTIPOV</td><td>04a</td><td>SPNX</td><td>ρN(C) → Λ(1520) K<sup>+</sup> N(C)</td></tr><tr><td>8.0 ± 1.4</td><td>238</td><td>MAST</td><td>68b</td><td>HBC</td><td>Using Γ(NK̄)/Γ<sub>total</sub> = 0.45</td></tr></table>

Γ(Σ<sup>0</sup>γ)/Γ<sub>total</sub> Γ<sub>11</sub>/Γ

DOCUMENT ID TECN COMMENT VALUE

0.02 ± 0.0035 1 MAST 68b HBC Not measured; see note

¹ Calculated from Γ(Λγ)/Γ<sub>total</sub>, assuming SU(3). Needed to constrain the sum of all the branching ratios to be unity.

Λ(1520) 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>WIELAND</td><td>11</td><td>EPJ A47 47</td><td>F. Wieland et al.</td><td>(ELSA SAPHIR Collab.)</td></tr><tr><td>QIANG</td><td>10</td><td>PL B694 123</td><td>Y. Qiang et al.</td><td>(DUKE, JEFF, PNPI, GWU+)</td></tr><tr><td>TAYLOR</td><td>05</td><td>PR C71 054609 (errat.)</td><td>S. Taylor et al.</td><td>(JLab CLAS Collab.)</td></tr><tr><td>TAYLOR</td><td>05</td><td>PR C72 039902</td><td>S. Taylor et al.</td><td>(JLab CLAS Collab.)</td></tr><tr><td>ANTIPOV</td><td>04a</td><td>PL B604 22</td><td>Yu.M. Antipov et al.</td><td>(IHEP SPHINX Collab.)</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>BARBER</td><td>80d</td><td>ZPHY C7 17</td><td>D.P. Barber et al.</td><td>(DARE, LANC, SHEF)</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>BARLAG</td><td>79</td><td>NP B149 220</td><td>S.J.M. Bartlag et al.</td><td>(AMST, CERN, NIJM+)</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>78</td><td>PRL 38 1007</td><td>M. Alston-Garnjost et al.</td><td>(LBL, MTHO+) IJP</td></tr><tr><td>CAMERON</td><td>77</td><td>NP B131 399</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>MAST</td><td>76</td><td>PR D14 13</td><td>T.S. Mast et al.</td><td>(LBL)</td></tr><tr><td>CORDEN</td><td>75</td><td>NP B84 306</td><td>M.J. Corden et al.</td><td>(BIRM)</td></tr><tr><td>BERTHON</td><td>74</td><td>NC 21A 146</td><td>A. Berthon et al.</td><td>(CDEF, RHEL, SACL+)</td></tr><tr><td>MAST</td><td>73</td><td>PR D7 3212</td><td>T.S. Mast et al.</td><td>(LBL) IJP</td></tr><tr><td>MAST</td><td>73b</td><td>PR D7 5</td><td>T.S. Mast et al.</td><td>(LBL) IJP</td></tr><tr><td>CHAN</td><td>72</td><td>PRL 28 256</td><td>S.B. Chan et al.</td><td>(MASA, YALE)</td></tr><tr><td>BURKHARDT</td><td>71</td><td>NP B27 64</td><td>E. Burkhardt et al.</td><td>(HEID, CERN, SAPL)</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>71</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>BARBARO...</td><td>69B</td><td>Lund Conf. 352</td><td>A. Barbaro-Galtieri et al.</td><td>(LRL)</td></tr><tr><td>Also</td><td>69B</td><td>Duke Conf. 95</td><td>R.D. Tripp</td><td>(LRL)</td></tr><tr><td>Hyperon Resonances 1970</td><td></td><td></td><td></td><td></td></tr><tr><td>BURKHARDT</td><td>69</td><td>NP B14 106</td><td>E. Burkhardt et al.</td><td>(HEID, EFI, CERN+)</td></tr></table>

<table><tr><td>MAST</td><td>68B</td><td>PRL 21 1715</td><td>T.S. Mast et al.</td><td>(LRL)</td></tr><tr><td>SCHEUER</td><td>68</td><td>NP B8 503</td><td>J.C. Scheuer et al.</td><td>(SABRE Collab.)</td></tr><tr><td>DAHL</td><td>67</td><td>PR 163 1377</td><td>O.I. Dahl et al.</td><td>(LRL)</td></tr><tr><td>DAUBER</td><td>67</td><td>PL 24B 525</td><td>P.M. Dauber et al.</td><td>(UCLA)</td></tr><tr><td>UHLIG</td><td>67</td><td>PR 155 1448</td><td>R.P. Uhlig et al.</td><td>(UMD, NRL)</td></tr><tr><td>BIRMINGHAM</td><td>66</td><td>PR 152 1148</td><td>M. Haque et al.</td><td>(BIRM, GLAS, LOIC, OXF+)</td></tr><tr><td>ARMENTEROS 65C</td><td>65</td><td>PL 19 338</td><td>R. Armenteros et al.</td><td>(CERN, HEID, SACL)</td></tr><tr><td>MUSGRAVE</td><td>65</td><td>NC 35 735</td><td>B. Musgrave et al.</td><td>(BIRM, CERN, EPOL+)</td></tr><tr><td>WATSON</td><td>63</td><td>PR 131 2248</td><td>M.B. Watson, M. Ferro-Luzzi, R.D. Tripp</td><td>(LRL) IJP</td></tr><tr><td>FERRO-LUZZI</td><td>62</td><td>PRL 8 28</td><td>M. Ferro-Luzzi, R.D. Tripp, M.B. Watson</td><td>(LRL) IJP</td></tr></table>

$$\Lambda(1600) \frac{1}{2}^+$$

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

Λ(1600) POLE POSITION

REAL PART

DOCUMENT ID TECN COMMENT VALUE

1540 to 1560 (≈ 1550) OUR ESTIMATE

1546 ± 6 OUR AVERAGE Error includes scale factor of 2.1.

1562 ± 8 SARANTSEV 19 DPWA K̄N multichannel

1544 + 3/3 1 KAMANO 15 DPWA Multichannel

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

1572 ZHANG 13A DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

-2×IMAGINARY PART

DOCUMENT ID TECN COMMENT VALUE

120 to 240 (≈ 180) OUR ESTIMATE

159 + 60/12 OUR AVERAGE Error includes scale factor of 6.2.

232 ± 15 SARANTSEV 19 DPWA K̄N multichannel

112 + 1/2 1 KAMANO 15 DPWA Multichannel

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

138 ZHANG 13A DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

Λ(1600) POLE RESIDUES

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

Normalized residue in N̄K → Λ(1600) → N̄K

<table><tr><td>MODULUS</td><td>PHASE (°)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>0.36 ± 0.07</td><td>-63 ± 10</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></table>

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

0.105 -80 1 KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

Normalized residue in N̄K → Λ(1600) → Σπ

<table><tr><td>MODULUS</td><td>PHASE (°)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>0.39 ± 0.08</td><td>148 ± 10</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></table>

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

0.232 108 1 KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

Normalized residue in N̄K → Λ(1600) → Λη

<table><tr><td>MODULUS</td><td>PHASE (°)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>0.22 ± 0.13</td><td>180 ± 20</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></table>

Normalized residue in N̄K → Λ(1600) → Λσ

<table><tr><td>MODULUS</td><td>PHASE (°)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>0.30 ± 0.06</td><td>-70 ± 10</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></table>

Normalized residue in N̄K → Λ(1600) → Σ(1385)π

<table><tr><td>MODULUS</td><td>PHASE (°)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>0.37 ± 0.07</td><td>103 ± 12</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></table>

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

0.183 77 1 KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

Normalized residue in N̄K → Λ(1600) → N̄K* (892), S=1/2, P-wave

<table><tr><td>MODULUS</td><td>PHASE (°)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>0.02 ± 0.01</td><td>126 ± 45</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></table>

Normalized residue in N̄K → Λ(1600) → N̄K* (892), S=3/2, P-wave

<table><tr><td>MODULUS</td><td>PHASE (°)</td><td>DOCUMENT ID</td><td>TECN</td><td>COMMENT</td></tr><tr><td>0.02 ± 0.01</td><td>-135 ± 45</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄N multichannel</td></tr></table>
## $\Lambda(1600)$ 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>1570 to 1630 (≈ 1600) OUR ESTIMATE</strong></td></tr><tr><td>1605 ± 8</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>1592 ± 10</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>1568 ± 20</td><td>GOPAL</td><td>80</td><td>DPWA $\overline{K}N \to \overline{K}N$</td></tr><tr><td>1703 ± 100</td><td>ALSTON-...</td><td>78</td><td>DPWA $\overline{K}N \to \overline{K}N$</td></tr><tr><td>1573 ± 25</td><td>GOPAL</td><td>77</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>1596 ± 6</td><td>KANE</td><td>74</td><td>DPWA $\overline{K}^-p \to \Sigma\pi$</td></tr><tr><td>1620 ± 10</td><td>LANGBEIN</td><td>72</td><td>IPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

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

<table><tr><td>1572 or 1617</td><td>1 MARTIN</td><td>77</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>1646 ± 7</td><td>2 CARROLL</td><td>76</td><td>DPWA Isospin-0 total $\sigma$</td></tr><tr><td>1570</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr></table>

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

² A total cross-section bump with $(J+1/2) \Gamma_{el} / \Gamma_{total} = 0.04$.

## $\Lambda(1600)$ 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>150 to 250 (≈ 200) OUR ESTIMATE</strong></td></tr><tr><td>245 ± 15</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>150 ± 28</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>116 ± 20</td><td>GOPAL</td><td>80</td><td>DPWA $\overline{K}N \to \overline{K}N$</td></tr><tr><td>593 ± 200</td><td>ALSTON-...</td><td>78</td><td>DPWA $\overline{K}N \to \overline{K}N$</td></tr><tr><td>147 ± 50</td><td>GOPAL</td><td>77</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>175 ± 20</td><td>KANE</td><td>74</td><td>DPWA $\overline{K}^-p \to \Sigma\pi$</td></tr><tr><td>60 ± 10</td><td>LANGBEIN</td><td>72</td><td>IPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

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

<table><tr><td>247 or 271</td><td>1 MARTIN</td><td>77</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>20</td><td>2 CARROLL</td><td>76</td><td>DPWA Isospin-0 total $\sigma$</td></tr><tr><td>50</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr></table>

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

² A total cross-section bump with $(J+1/2) \Gamma_{el} / \Gamma_{total} = 0.04$.

## $\Lambda(1600)$ DECAY MODES

<table><thead><tr><th>Mode</th><th>Mode</th><th>Fraction ($\Gamma_{\gamma}/\Gamma$)</th></tr></thead><tbody><tr><td>$\Gamma_1$</td><td>$N\overline{K}$</td><td>15-30 %</td></tr><tr><td>$\Gamma_2$</td><td>$\Sigma\pi$</td><td>10-60 %</td></tr><tr><td>$\Gamma_3$</td><td>$\Lambda\sigma$</td><td>(19±4) %</td></tr><tr><td>$\Gamma_4$</td><td>$\Sigma(1385)\pi$</td><td>(9±4) %</td></tr></tbody></table>

## $\Lambda(1600)$ BRANCHING RATIOS

See “Sign conventions for resonance couplings” in the Note on $\Lambda$ and $\Sigma$ Resonances.

$$ \Gamma(N\overline{K})/\Gamma_{\text{total}} \qquad \Gamma_1/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4"><strong>0.14 to 0.28 OUR ESTIMATE</strong></td></tr><tr><td>0.29 ± 0.06</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>0.14 ± 0.04</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>0.23 ± 0.04</td><td>GOPAL</td><td>80</td><td>DPWA $\overline{K}N \to \overline{K}N$</td></tr><tr><td>0.14 ± 0.05</td><td>ALSTON-...</td><td>78</td><td>DPWA $\overline{K}N \to \overline{K}N$</td></tr><tr><td>0.25 ± 0.15</td><td>LANGBEIN</td><td>72</td><td>IPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

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

<table><tr><td>0.064</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr><tr><td>0.24 ± 0.04</td><td>GOPAL</td><td>77</td><td>DPWA See GOPAL 80</td></tr><tr><td>0.30 or 0.29</td><td>2 MARTIN</td><td>77</td><td>DPWA $\overline{K}N$ multichannel</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>0.37 ± 0.07</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

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

<table><tr><td>0.851</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(\Lambda\sigma)/\Gamma_{\text{total}} \qquad \Gamma_3/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.19 ± 0.04</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

$$ \Gamma(\Sigma(1385)\pi)/\Gamma_{\text{total}} \qquad \Gamma_4/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.09 ± 0.04</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

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

<table><tr><td>0.085</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

$$ (\Gamma_1\Gamma_2)^{1/2}/\Gamma_{\text{total}} \text{ in } N\overline{K} \to \Lambda(1600) \to \Sigma\pi \qquad (\Gamma_1\Gamma_2)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.23 ± 0.03</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.16 ± 0.04</td><td>GOPAL</td><td>77</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>-0.33 ± 0.11</td><td>KANE</td><td>74</td><td>DPWA $\overline{K}^-p \to \Sigma\pi$</td></tr><tr><td>0.28 ± 0.09</td><td>LANGBEIN</td><td>72</td><td>IPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

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

<table><tr><td>-0.39 or -0.39</td><td>1 MARTIN</td><td>77</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>not seen</td><td>HEPP</td><td>76B</td><td>DPWA $\overline{K}^-p \to \Sigma\pi$</td></tr></table>

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

## $\Lambda(1600)$ 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 052505</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) IJ</td></tr><tr><td>ALSTON-...</td><td>78</td><td>PR D18 182</td><td>M. Alston-Garnjost et al.</td><td>(LBL, MTHO+) IJ</td></tr><tr><td>Also</td><td>78</td><td>PRL 38 1007</td><td>M. Alston-Garnjost et al.</td><td>(LBL, MTHO+) IJ</td></tr><tr><td>GOPAL</td><td>77</td><td>NP B119 362</td><td>G.P. Gopal et al.</td><td>(LOIC, RHEL) IJ</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+) IJ</td></tr><tr><td>Also</td><td>77</td><td>NP B126 266</td><td>B.R. Martin, M.K. Pidcock</td><td>(LOUC) IJ</td></tr><tr><td>Also</td><td>77</td><td>NP B126 285</td><td>B.R. Martin, M.K. Pidcock</td><td>(LOUC) IJ</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><tr><td>HEPP</td><td>76B</td><td>PL 65B 487</td><td>V. Hepp et al.</td><td>(CERN, HEIDH, MPIM) IJ</td></tr><tr><td>KANE</td><td>74</td><td>LBL-2452</td><td>D.F. Kane</td><td>(LBL) IJ</td></tr><tr><td>LANGBEIN</td><td>72</td><td>NP B47 477</td><td>W. Langbein, F. Wagner</td><td>(MPIM) IJ</td></tr><tr><td>KIM</td><td>71</td><td>PRL 27 356</td><td>J.K. Kim</td><td>(HARV) IJ</td></tr></table>

$$ \Lambda(1670) 1/2^{-} $$

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

The measurements of the mass, width, and elasticity published before 1974 are now obsolete and have been omitted. They were last listed in our 1982 edition Physics Letters **111B** 1 (1982).

## $\Lambda(1670)$ POLE POSITIONS

### 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>1670 to 1678 (≈ 1674) OUR ESTIMATE</strong></td></tr><tr><td>1676 ± 2</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>1669 ± 3/8</td><td>1 KAMANO</td><td>15</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>1677.5 ± 0.8</td><td>GARCIA-REC-...</td><td>03</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1667</td><td>ZHANG</td><td>13A</td><td>DPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### $-2 \times \text{IMAGINARY PART}$

<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>28 to 36 (≈ 32) OUR ESTIMATE</strong></td></tr><tr><td>33 ± 4</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>19 ± 18/2</td><td>1 KAMANO</td><td>15</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td>29.2 ± 1.4</td><td>GARCIA-REC-...</td><td>03</td><td>DPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

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

<table><tr><td>26</td><td>ZHANG</td><td>13A</td><td>DPWA $\overline{K}N$ multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

## $\Lambda(1670)$ POLE RESIDUES

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

### Normalized residue in $\overline{K}N \to \Lambda(1670) \to \overline{K}N$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.30 ± 0.06</td><td>-145 ± 11</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.351</td><td>164</td><td>1 KAMANO</td><td>15</td><td>DPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in $N\overline{K} \to \Lambda(1670) \to \Sigma\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.19 ± 0.06</td><td>145 ± 14</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.327</td><td>125</td><td>1 KAMANO</td><td>15</td><td>DPWA $\overline{K}N$ multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

### Normalized residue in $N\overline{K} \to \Lambda(1670) \to \Lambda\eta$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.26 ± 0.09</td><td>104 ± 14</td><td>SARANTSEV</td><td>19</td><td>DPWA $\overline{K}N$ multichannel</td></tr><tr><td colspan="5">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>0.474</td><td>59</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 $N\bar{K} \to \Lambda(1670) \to \Xi K$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.02±0.02</td><td>100 ± 25</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1670) \to \Lambda\omega, S=1/2, S-wave$

<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±0.04</td><td>-60 ± 35</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1670) \to \Lambda\omega, S=3/2, D-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.05±0.04</td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1670) \to N\bar{K}^*(892), S=1/2, S-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.31±0.14</td><td>100 ± 45</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1670) \to N\bar{K}^*(892), S=3/2, D-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.06±0.03</td><td>-85 ± 40</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1670) \to \Lambda\sigma$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.25±0.08</td><td>160 ± 15</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1670) \to \Sigma(1385)\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.13 ±0.06</td><td>110 ± 12</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. • • •

0.0988

-104

1 KAMANO

15 DPWA

Multichannel

¹ From the preferred solution A in KAMANO 15.

Λ(1670) 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>1670 to 1678 (≈ 1674) OUR ESTIMATE</strong></td></tr><tr><td>1674.3 ±0.8 ±4.9</td><td>LEE</td><td>21A</td><td>BELL Λ<sup>+</sup><sub>C</sub> → Λ(1670)π<sup>+</sup></td></tr><tr><td>1677 ±2</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr><tr><td>1672 ±3</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>1670.8 ±1.7</td><td>KOISO</td><td>85</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr><tr><td>1667 ±5</td><td>GOPAL</td><td>80</td><td>DPWA K N → K N</td></tr><tr><td>1671 ±3</td><td>ALSTON-...</td><td>78</td><td>DPWA K N → K N</td></tr><tr><td>1675 ±2</td><td>HEPP</td><td>76B</td><td>DPWA K<sup>-</sup> N → Σπ</td></tr><tr><td>1679 ±1</td><td>KANE</td><td>74</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr><tr><td>1665 ±5</td><td>PREVOST</td><td>74</td><td>DPWA K<sup>-</sup> N → Σ(1385)π</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>1673 ±2</td><td>MANLEY</td><td>02</td><td>DPWA K N multichannel</td></tr><tr><td>1668.9 ±2.0</td><td>ABAEV</td><td>96</td><td>DPWA K<sup>-</sup> p → Λη</td></tr><tr><td>1670 ±5</td><td>GOPAL</td><td>77</td><td>DPWA K N multichannel</td></tr><tr><td>1664</td><td>1 MARTIN</td><td>77</td><td>DPWA K N multichannel</td></tr></tbody></table>

¹ MARTIN 77 obtains identical resonance parameters from a T-matrix pole and from a Breit-Wigner fit.

Λ(1670) 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>25 to 35 (≈ 30) OUR ESTIMATE</strong></td></tr><tr><td>36.1 ± 2.4 ± 4.8</td><td>LEE</td><td>21A</td><td>BELL Λ<sup>+</sup><sub>C</sub> → Λ(1670)π<sup>+</sup></td></tr><tr><td>33 ± 4</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr><tr><td>29 ± 5</td><td>ZHANG</td><td>13A</td><td>DPWA K N multichannel</td></tr><tr><td>34.1 ± 3.7</td><td>KOISO</td><td>85</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr><tr><td>29 ± 5</td><td>GOPAL</td><td>80</td><td>DPWA K N → K N</td></tr><tr><td>29 ± 5</td><td>ALSTON-...</td><td>78</td><td>DPWA K N → K N</td></tr><tr><td>46 ± 5</td><td>HEPP</td><td>76B</td><td>DPWA K<sup>-</sup> N → Σπ</td></tr><tr><td>40 ± 3</td><td>KANE</td><td>74</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr><tr><td>19 ± 5</td><td>PREVOST</td><td>74</td><td>DPWA K<sup>-</sup> N → Σ(1385)π</td></tr><tr><td colspan="4">• • • We do not use the following data for averages, fits, limits, etc. • • •</td></tr><tr><td>23 ± 6</td><td>MANLEY</td><td>02</td><td>DPWA K N multichannel</td></tr><tr><td>21.1 ± 3.6</td><td>ABAEV</td><td>96</td><td>DPWA K<sup>-</sup> p → Λη</td></tr><tr><td>45 ±10</td><td>GOPAL</td><td>77</td><td>DPWA K N multichannel</td></tr><tr><td>12</td><td>1 MARTIN</td><td>77</td><td>DPWA K N multichannel</td></tr></tbody></table>

¹ MARTIN 77 obtains identical resonance parameters from a T-matrix pole and from a Breit-Wigner fit.

Λ(1670) 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 K̄</td><td>20–30 %</td></tr><tr><td>Γ<sub>2</sub> Σ π</td><td>25–55 %</td></tr><tr><td>Γ<sub>3</sub> Λη</td><td>10–25 %</td></tr><tr><td>Γ<sub>4</sub> Σ(1385)π, D-wave</td><td>(6.0 ± 2.0) %</td></tr><tr><td>Γ<sub>5</sub> N K̄*(892), S=1/2, S-wave</td><td></td></tr><tr><td>Γ<sub>6</sub> N K̄*(892), S=3/2, D-wave</td><td>(5 ± 4) %</td></tr><tr><td>Γ<sub>7</sub> Λσ</td><td>(20 ± 8) %</td></tr></tbody></table>

Λ(1670) BRANCHING RATIOS

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

<table><caption>Γ(NK̄)/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>0.20 to 0.30 OUR ESTIMATE</td><td></td><td></td><td></td></tr><tr><td>0.33 ±0.07</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr><tr><td>0.26 ±0.25</td><td>ZHANG</td><td>13A</td><td>DPWA K N multichannel</td></tr><tr><td>0.18 ±0.03</td><td>GOPAL</td><td>80</td><td>DPWA K N → K N</td></tr><tr><td>0.17 ±0.03</td><td>ALSTON-...</td><td>78</td><td>DPWA K N → K N</td></tr></tbody></table>

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

0.318

0.37 ±0.07

0.20 ±0.03

0.15

1

KAMANO 15 DPWA K N multichannel

MANLEY

02 DPWA

K N multichannel

GOPAL

77 DPWA

See GOPAL 80

2

MARTIN 77 DPWA K N multichannel

¹ From the preferred solution A in KAMANO 15.

² MARTIN 77 obtains identical resonance parameters 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>0.12 ±0.03</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

0.373

0.30 ±0.08

0.289

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

1

KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

<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>0.20 ±0.08</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

0.373

0.30 ±0.08

0.373

0.30 ±0.08

KAMANO

15 DPWA

Multichannel

ABAEV

96 DPWA

K<sup>-</sup> p → Λη

<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>0.06 ±0.02</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

0.019

0.019

0.019

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

KAMANO

15 DPWA

Multi-channel

<table><caption>Γ(Λσ)/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>0.20 ±0.08</td><td>SARANTSEV</td><td>19</td><td>DPWA K N multichannel</td></tr></tbody></table>

0.20 ±0.08

<table><caption>Γ(NK̄*(892), S=1/2, S-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>0.05 ±0.04</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. • • •

not seen

1

KAMANO 15 DPWA Multichannel

¹ Not seen in the preferred solution A in KAMANO 15.

<table><caption>Γ(NK̄*(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>0.05 ±0.04</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

0.05 ±0.04

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

not seen

1

KAMANO

15 DPWA

Multichannel

¹ Not seen in the preferred solution A in KAMANO 15.

<table><caption>(Γ<sub>f</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N̄K → Λ(1670) → Σ π</caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.29 ±0.06</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.26 ±0.02</td><td>KOISO</td><td>85</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr><tr><td>-0.31 ±0.03</td><td>GOPAL</td><td>77</td><td>DPWA K N multichannel</td></tr><tr><td>-0.29 ±0.03</td><td>HEPP</td><td>76B</td><td>DPWA K<sup>-</sup> N → Σπ</td></tr><tr><td>-0.23 ±0.03</td><td>LONDON</td><td>75</td><td>HLBC K<sup>-</sup> p → Σ<sub>0π</sub>0</td></tr><tr><td>-0.27 ±0.02</td><td>KANE</td><td>74</td><td>DPWA K<sup>-</sup> p → Σπ</td></tr></tbody></table>

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

-0.38 ±0.03

-0.13

MANLEY

02 DPWA

K N multichannel

1

MARTIN 77 DPWA K N multichannel

¹ MARTIN 77 obtains identical resonance parameters from a T-matrix pole and from a Breit-Wigner fit.

<table><caption>(Γ<sub>f</sub>Γ<sub>f</sub>)<sup>1/2</sup>/Γ<sub>total</sub> in N̄K → Λ(1670) → Λη</caption><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.30 ±0.10</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>+0.20 ±0.05</td><td>BAXTER</td><td>73</td><td>DPWA K<sup>-</sup> p → neutrals</td></tr></tbody></table>

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

+0.20 ±0.05

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

+0.24 ±0.04

0.24

0.26

0.26

0.20 or 0.23

MANLEY

02 DPWA

K N multichannel

KIM

71 DPWA

K-matrix analysis

ARMENTEROS69c

HBC

BERLEY

65 HBC
$$ (\Gamma_f \Gamma_f)^{1/2} / \Gamma_{\text{total}} \text{ in } N\bar{K} \to \Lambda(1670) \to \Sigma(1385)\pi, \text{ D-wave} \quad (\Gamma_1 \Gamma_4)^{1/2} / \Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.17 ± 0.06</td><td>MANLEY</td><td>02</td><td>DPWA K'N multichannel</td></tr><tr><td>-0.18 ± 0.05</td><td>PREVOST</td><td>74</td><td>DPWA K'N → Σ(1385)π</td></tr></tbody></table>

Λ(1670) REFERENCES

LEE 21A PR D103 0052005
SARANTSEV 19 EPJ A55 180
KAMANO 15 PR C92 025205
ZHANG 13A PR C88 035205
GARCIA-REC... 03 PR D67 076009
MANLEY 02 PR B88 012002
ABAEV 96 PR C53 385
KOISO 85 NP A433 619
PDG 82 PL 111B 1
GOPAL 80 Toronto Conf. 159
ALSTON... 78 PR D18 102
Also 77 NP B119 362
MARTIN 77 NP B127 349
Also NP B126 266
Also NP B126 285
HEPP 76B PL 65B 487
LONDON 75 NP B85 289
KANE 74 LBL-2452
PREVOST 74 NP B69 246
BAXTER 73 NP B67 125
KIM 71 PRL 27 356
Also Hyperon Resonances, 1970
ARMENTEROS 69C Lund Paper 229
Values are quoted in LEV-B-SETT 69.
BERLEY 65 PRL 15 641

J.Y. Lee et al. (BELLE Collab.)
A.V. Sarantsev et al. (BONN, PNPI)
H. Kamano et al. (ANL, OSAK)
H. Zhang et al. (KSU)
C. Garcia-Recio et al. (GRAN, YALE)
M. Manley et al. (BNL Crystal Ball Collab.)
V.V. Abaev, B.M.K. Nefkens (UCLA)
H. Kolso et al. (TOKY, MASA)
M. Roos et al. (HELS, CIT, CERN)
G.P. Gopal M. Alston-Garnjost et al. (RHEL) IJP
M. Alston-Garnjost et al. (LBL, MTHO+) IJP
M. Alston-Garnjost et al. (LBL, MTHO+) IJP
G.P. Gopal et al. (LOIC, RHEL) IJP
B.R. Martin, M.K. Pidcock, R.G. Moorhouse (LOUC+) IJP
B.R. Martin, M.K. Pidcock (LOUC)
B.R. Martin, M.K. Pidcock (LOUC) IJP
V. Hepp et al. (CERN, HEIDH, MPIM) IJP
G.W. London et al. (BNL, CERN, EPOL+)
D.F. Kane (LBL)
J. Prevost et al. (SACL, CERN, HEID)
D.F. Baxter et al. (OXF) IJP
J.K. Kim (HARV) IJP
J.K. Kim (HARV) IJP
R. Armenteros et al. (CERN, HEID, SACL) IJP
D. Berley et al. (BNL) IJP

$$ \Lambda(1690) 3/2^{-} $$

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

The measurements of the mass, width, and elasticity published before 1974 are now obsolete and have been omitted. They were last listed in our 1982 edition Physics Letters **111B** 1 (1982).

Λ(1690) 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>1680 to 1700 (≈ 1690) OUR ESTIMATE</strong></td></tr><tr><td>1683 ± 3</td><td>SARANTSEV</td><td>19</td><td>DPWA K'N multichannel</td></tr><tr><td>1697 ± 6</td><td>1 KAMANO</td><td>15</td><td>DPWA K'N multichannel</td></tr></tbody></table>



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

<table><tbody><tr><td>1689</td><td>ZHANG</td><td>13A</td><td>DPWA K'N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

-2xIMAGINARY 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>60 to 80 (≈ 70) OUR ESTIMATE</strong></td></tr><tr><td>72 ± 5</td><td>SARANTSEV</td><td>19</td><td>DPWA K'N multichannel</td></tr><tr><td>65 ± 14</td><td>1 KAMANO</td><td>15</td><td>DPWA K'N multichannel</td></tr></tbody></table>



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

<table><tbody><tr><td>53</td><td>ZHANG</td><td>13A</td><td>DPWA K'N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

Λ(1690) POLE RESIDUES

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

Normalized residue in $N\bar{K} \to \Lambda(1690) \to N\bar{K}$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.24 ± 0.05</td><td>-28 ± 5</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><tbody><tr><td>0.251</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 $N\bar{K} \to \Lambda(1690) \to \Sigma\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.35 ± 0.07</td><td>175 ± 6</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><tbody><tr><td>0.315</td><td>-173</td><td>1 KAMANO</td><td>15</td><td>DPWA K'N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1690) \to \Lambda\eta$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.05 ± 0.02</td><td>88 ± 8</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><tbody><tr><td>0.00567</td><td>81</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 $N\bar{K} \to \Lambda(1690) \to \Lambda\sigma$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.08 ± 0.02</td><td>-10 ± 6</td><td>SARANTSEV</td><td>19</td><td>DPWA K'N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1690) \to \Sigma(1385)\pi, S$-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>170 ± 70</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><tbody><tr><td>0.134</td><td>168</td><td>1 KAMANO</td><td>15</td><td>DPWA K'N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1690) \to \Sigma(1385)\pi, D$-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>0.06 ± 0.04</td><td>164 ± 15</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><tbody><tr><td>0.319</td><td>-22</td><td>1 KAMANO</td><td>15</td><td>DPWA K'N multichannel</td></tr></tbody></table>

¹ From the preferred solution A in KAMANO 15.

Normalized residue in $N\bar{K} \to \Lambda(1690) \to N\bar{K}^*(892), S$-wave

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.05 ± 0.04</td><td>SARANTSEV</td><td>19</td><td>DPWA K'N multichannel</td></tr></tbody></table>

<table><tbody><tr><td>0.18+/-0.050-110+-45</td><td>SARANTSEV</td><td>19</td><td>DPWA K'N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1690) \to N\bar{K}^*(892), D$-wave

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.18+/-0.050-110+-45</td><td>SARANTSEV</td><td>19</td><td>DPWA K'N multichannel</td></tr></tbody></table>

Λ(1690) 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>1685 to 1695 (≈ 1690) OUR ESTIMATE</strong></td></tr><tr><td>1689 ± 3</td><td>SARANTSEV</td><td>19</td><td>DPWA K'N multichannel</td></tr><tr><td>1691 ± 3</td><td>ZHANG</td><td>13A</td><td>DPWA K'N multichannel</td></tr><tr><td>1695.7 ± 2.6</td><td>KOISO</td><td>85</td><td>DPWA K'N → Σπ</td></tr><tr><td>1690 ± 5</td><td>GOPAL</td><td>80</td><td>DPWA K'N → K'N</td></tr><tr><td>1692 ± 5</td><td>ALSTON...</td><td>78</td><td>DPWA K'N → K'N</td></tr><tr><td>1690 ± 3</td><td>HEPP</td><td>76B</td><td>DPWA K'N → Σπ</td></tr><tr><td>1689 ± 1</td><td>KANE</td><td>74</td><td>DPWA K'N → Σπ</td></tr></tbody></table>

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

<table><tbody><tr><td>1690 ± 5</td><td>GOPAL</td><td>77</td><td>DPWA K'N multichannel</td></tr><tr><td>1687 or 1689</td><td>1 MARTIN</td><td>77</td><td>DPWA K'N multichannel</td></tr><tr><td>1692 ± 4</td><td>CARROLL</td><td>76</td><td>DPWA Isospin-0 total σ</td></tr></tbody></table>

<table><tbody><tr><td>1690 ± 5</td><td>GOPAL</td><td>77</td><td>DPWA K'N multichannel</td></tr><tr><td>1687 or 1689</td><td>1 MARTIN</td><td>77</td><td>DPWA K'N multichannel</td></tr><tr><td>1692 ± 4</td><td>CARROLL</td><td>76</td><td>DPWA Isospin-0 total σ</td></tr></tbody></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit. Another $D_{03}$ Λ at 1966 MeV is also suggested by MARTIN 77, but is very uncertain.

Λ(1690) 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 80 (≈ 70) OUR ESTIMATE</strong></td></tr><tr><td>75 ± 5</td><td>SARANTSEV</td><td>19</td><td>DPWA K'N multichannel</td></tr><tr><td>54 ± 5</td><td>ZHANG</td><td>13A</td><td>DPWA K'N multichannel</td></tr><tr><td>67.2 ± 5.6</td><td>KOISO</td><td>85</td><td>DPWA K'N → Σπ</td></tr><tr><td>61 ± 5</td><td>GOPAL</td><td>80</td><td>DPWA K'N → K'N</td></tr><tr><td>64 ± 10</td><td>ALSTON...</td><td>78</td><td>DPWA K'N → K'N</td></tr><tr><td>82 ± 8</td><td>HEPP</td><td>76B</td><td>DPWA K'N → Σπ</td></tr><tr><td>60 ± 4</td><td>KANE</td><td>74</td><td>DPWA K'N → Σπ</td></tr></tbody></table>

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

<table><tbody><tr><td>60 ± 5</td><td>GOPAL</td><td>77</td><td>DPWA K'N multichannel</td></tr><tr><td>62 or 62</td><td>1 MARTIN</td><td>77</td><td>DPWA K'N multichannel</td></tr><tr><td>38</td><td>CARROLL</td><td>76</td><td>DPWA Isospin-0 total σ</td></tr></tbody></table>

<table><tbody><tr><td>60 ± 5</td><td>GOPAL</td><td>77</td><td>DPWA K'N multichannel</td></tr><tr><td>62 or 62</td><td>1 MARTIN</td><td>77</td><td>DPWA K'N multichannel</td></tr><tr><td>38</td><td>CARROLL</td><td>76</td><td>DPWA Isospin-0 total σ</td></tr></tbody></table>

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit. Another $D_{03}$ Λ at 1966 MeV is also suggested by MARTIN 77, but is very uncertain.

Λ(1690) 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<sup>3</sup></td><td>20–30 %</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>20–40 %</td></tr><tr><td>Γ<sub>3</sub> Λσ</td><td>(5.0 ± 2.0) %</td></tr><tr><td>Γ<sub>4</sub> Λππ</td><td>~ 25 %</td></tr><tr><td>Γ<sub>5</sub> Σππ</td><td>~ 20 %</td></tr><tr><td>Γ<sub>6</sub> Λη</td><td></td></tr><tr><td>Γ<sub>7</sub> Σ(1385)π, S-wave</td><td>(9 ± 5) %</td></tr><tr><td>Γ<sub>8</sub> Σ(1385)π, D-wave</td><td>(3.0 ± 2.0) %</td></tr><tr><td>Γ<sub>9</sub> N<sup>3</sup>K<sup>*</sup>(892), S=1/2, D-wave</td><td></td></tr><tr><td>Γ<sub>10</sub> N<sup>3</sup>K<sup>*</sup>(892), S=3/2, S-wave</td><td></td></tr><tr><td>Γ<sub>11</sub> N<sup>3</sup>K<sup>*</sup>(892), S=3/2, D-wave</td><td></td></tr></tbody></table>

Λ(1690) BRANCHING RATIOS

$$ \Gamma(N\bar{K})/\Gamma_{\text{total}} \qquad \Gamma_1/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.20 to 0.28 OUR ESTIMATE</td><td>SARANTSEV</td><td>19</td><td>DPWA K'N multichannel</td></tr><tr><td>0.23 ± 0.05</td><td>ZHANG</td><td>13A</td><td>DPWA K'N multichannel</td></tr><tr><td>0.25 ± 0.04</td><td>GOPAL</td><td>80</td><td>DPWA K'N → K'N</td></tr><tr><td>0.23 ± 0.03</td><td>ALSTON...</td><td>78</td><td>DPWA K'N → K'N</td></tr></tbody></table>
• • • We do not use the following data for averages, fits, limits, etc. • • •

0.239 1 KAMANO 15 DPWA K̄ N multichannel

0.24 ±0.03 GOPAL 77 DPWA See GOPAL 80

0.28 or 0.26 2 MARTIN 77 DPWA K̄ 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. Another D₀₃ Λ at 1966 MeV is also suggested by MARTIN 77, but is very uncertain.

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

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.50 ±0.10</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄ N multichannel</td></tr></tbody></table>

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

0.387 1 KAMANO 15 DPWA K̄ N multichannel

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(\Lambda\eta)/\Gamma_{\text{total}} \qquad \Gamma_{6/\Gamma} $$

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

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

not seen 1 KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

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

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

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

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.09 ±0.05</td><td>SARANTSEV</td><td>19</td><td>DPWA K̄ N multichannel</td></tr></tbody></table>

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

0.062 1 KAMANO 15 DPWA K̄ N multichannel

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(\Sigma(1385)\pi, D\text{-wave})/\Gamma_{\text{total}} \qquad \Gamma_{8/\Gamma} $$

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

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

0.308 1 KAMANO 15 DPWA K̄ N multichannel

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(N\bar{K}^*(892), S=1/2, D\text{-wave})/\Gamma_{\text{total}} \qquad \Gamma_{9/\Gamma} $$

<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>

not seen SARANTSEV 19 DPWA K̄ N multichannel

not seen 1 KAMANO 15 DPWA K̄ N multichannel

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(N\bar{K}^*(892), S=3/2, S\text{-wave})/\Gamma_{\text{total}} \qquad \Gamma_{10/\Gamma} $$

<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>

0.003 1 KAMANO 15 DPWA Multichannel

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

<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>

not seen 1 KAMANO 15 DPWA Multichannel

¹ From the preferred solution A in KAMANO 15.

$$ \Gamma(\Gamma\Gamma\Gamma)^{1/2}/\Gamma_{\text{total}} \quad \Gamma(1\Gamma_2)^{1/2}/\Gamma \qquad \Gamma(1\Gamma_3)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.27 ±0.03</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.34 ±0.02</td><td>KOISO</td><td>85</td><td>DPWA K̄ p → Σπ</td></tr><tr><td>-0.25 ±0.03</td><td>GOPAL</td><td>77</td><td>DPWA K̄ N multichannel</td></tr><tr><td>-0.29 ±0.03</td><td>HEPP</td><td>76B</td><td>DPWA K̄ N → Σπ</td></tr><tr><td>-0.28 ±0.03</td><td>LONDON</td><td>75</td><td>HLBC K̄ p → Σ⁰π⁰</td></tr><tr><td>-0.28 ±0.02</td><td>KANE</td><td>74</td><td>DPWA K̄ p → Σπ</td></tr></tbody></table>

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

-0.30 or -0.28 1 MARTIN 77 DPWA K̄ N multichannel

¹ The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit. Another D₀₃ Λ at 1966 MeV is also suggested by MARTIN 77, but is very uncertain.

$$ \Gamma(\Gamma\Gamma\Gamma)^{1/2}/\Gamma_{\text{total}} \quad \Gamma(1\Gamma_4)^{1/2}/\Gamma \qquad \Gamma(1\Gamma_5)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.20 ±0.08</td><td></td><td></td><td></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. Another D₀₃ Λ at 1966 MeV is also suggested by MARTIN 77, but is very uncertain.

$$ \Gamma(\Gamma\Gamma\Gamma)^{1/2}/\Gamma_{\text{total}} \quad \Gamma(1\Gamma_4)^{1/2}/\Gamma \qquad \Gamma(1\Gamma_6)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.25 ±0.02</td><td>1 BARTLEY 68</td><td>HDBC K̄ p → Λππ</td><td></td></tr></tbody></table>

1 BARTLEY 68 uses only cross-section data. The enhancement is not seen by PRE-VOST 71.

$$ \Gamma(\Gamma\Gamma\Gamma)^{1/2}/\Gamma_{\text{total}} \quad \Gamma(1\Gamma_5)^{1/2}/\Gamma \qquad \Gamma(1\Gamma_7)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.21</td><td>ARMENTEROS68C</td><td>HDBC K̄ N → Σππ</td><td></td></tr></tbody></table>

$$ (\Gamma_i\Gamma_f)^{1/2}/\Gamma_{\text{total}} \quad \Lambda(1690) \to \Lambda\eta \qquad \Gamma(1\Gamma_6)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.00 ±0.03</td><td>BAXTER</td><td>73</td><td>DPWA K̄ p → neutrals</td></tr></tbody></table>

$$ (\Gamma_i\Gamma_f)^{1/2}/\Gamma_{\text{total}} \quad \Lambda(1690) \to \Sigma(1385)\pi, S\text{-wave} \qquad \Gamma(1\Gamma_7)^{1/2}/\Gamma $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.28 ±0.06</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>+0.27 ±0.04</td><td>PREVOST</td><td>74</td><td>DPWA K̄ N → Σ(1385)π</td></tr></tbody></table>

### Λ(1690) 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 052502</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>KOISO</td><td>85</td><td>NP A433 619</td><td>H. Koiso et al. (TOKY, MASA)</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) JP</td></tr><tr><td>ALSTON...</td><td>78</td><td>PR D18 182</td><td>M. Alston-Garnjost et al. (LBL, MTHO+) JP</td></tr><tr><td>Also</td><td>78</td><td>PR L3 1007</td><td>M. Alston-Garnjost et al. (LBL, MTHO+) JP</td></tr><tr><td>GOPAL</td><td>77</td><td>NP B119 362</td><td>G.P. Gopal et al. (LOIC, RHEL) JP</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+) JP</td></tr><tr><td>Also</td><td>77</td><td>NP B126 266</td><td>B.R. Martin, M.K. Pidcock (LOUC)</td></tr><tr><td>Also</td><td>77</td><td>NP B126 285</td><td>B.R. Martin, M.K. Pidcock (LOUC) JP</td></tr><tr><td>CARROLL</td><td>76</td><td>PRL 37 806</td><td>A.S. Carroll et al. (BNL) I</td></tr><tr><td>HEPP</td><td>76B</td><td>PL 65B 487</td><td>V. Hepp et al. (CERN, HEIDM, PMIM) JP</td></tr><tr><td>LONDON</td><td>75</td><td>NP B85 289</td><td>G.W. London et al. (BNL, CERN, EPOL+)</td></tr><tr><td>KANE</td><td>74</td><td>LBL-2452</td><td>D.F. Kane (LBL) JP</td></tr><tr><td>PREVOST</td><td>74</td><td>NP B69 246</td><td>J. Prevost et al. (SACL, CERN, HEID)</td></tr><tr><td>BAXTER</td><td>73</td><td>NP B67 125</td><td>D.F. Baxter et al. (OXF) JP</td></tr><tr><td>PREVOST</td><td>71</td><td>Amsterdam Conf.</td><td>J. Prevost (CERN, HEID, SACL)</td></tr><tr><td>ARMENTEROS</td><td>68C</td><td>NP B8 216</td><td>R. Armenteros et al. (CERN, HEID, SACL) I</td></tr><tr><td>BARTLEY</td><td>68</td><td>PRL 21 1111</td><td>J.H. Bartley et al. (TUFTS, FSU, BRAN) I</td></tr></table>

$$ \Lambda(1710) 1/2^+ $$

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

### OMITTED FROM SUMMARY TABLE

### Λ(1710) MASS

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>1713 ±13</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

### Λ(1710) WIDTH

<table><thead><tr><th>VALUE (MeV)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>180 ±42</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

### Λ(1710) 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> N̄K̄</td><td>(43 ±4) %</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>(21 ±5) %</td></tr><tr><td>Γ<sub>3</sub> Σ*(1385)π, P-wave</td><td>(20 ±8) %</td></tr><tr><td>Γ<sub>4</sub> N̄K̄*(892)</td><td></td></tr><tr><td>Γ<sub>5</sub> N̄K̄*(892), S=1/2</td><td>(5 ±4) %</td></tr><tr><td>Γ<sub>6</sub> N̄K̄*(892), S=3/2, P-wave</td><td>(10 ±8) %</td></tr></tbody></table>

### Λ(1710) BRANCHING RATIOS

$$ \Gamma(N\bar{K}^*)/\Gamma_{\text{total}} \qquad \Gamma_{1/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.43 ±0.04</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

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

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.21 ±0.05</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

$$ \Gamma(\Sigma^*(1385)\pi, P\text{-wave})/\Gamma_{\text{total}} \qquad \Gamma_{3/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.20 ±0.08</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

$$ \Gamma(N\bar{K}^*(892), S=1/2)/\Gamma_{\text{total}} \qquad \Gamma_{5/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.05 ±0.04</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

$$ \Gamma(N\bar{K}^*(892), S=3/2, P\text{-wave})/\Gamma_{\text{total}} \qquad \Gamma_{6/\Gamma} $$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.10 ±0.08</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

### Λ(1710) REFERENCES

<table><tr><td>ZHANG</td><td>13A</td><td>PR C88 035205</td><td>H. Zhang et al. (KSU)</td></tr></table>
$$\Lambda(1800) 1/2^{-}$$

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

Λ(1800) 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>1809 ± 9</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

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

1729 ZHANG 13A DPWA Multichannel

-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>205 ± 16</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

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

198 ZHANG 13A DPWA Multichannel

Λ(1800) POLE RESIDUES

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

Normalized residue in $N\bar{K} \to \Lambda(1800) \to N\bar{K}$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.34 ± 0.07</td><td>103 ± 8</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1800) \to \Sigma\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.30 ± 0.06</td><td>-123 ± 8</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1800) \to \Lambda\eta$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.06 ± 0.03</td><td>75 ± 10</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1800) \to \Lambda\sigma$

<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 ± 0.05</td><td>25 ± 10</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1800) \to \Lambda\omega$, $S=1/2$, $S-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.12 ± 0.04</td><td>-114 ± 30</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1800) \to \Lambda\omega$, $S=3/2$, $D-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.08 ± 0.03</td><td>-90 ± 17</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1800) \to \Sigma(1385)\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.16 ± 0.06</td><td>-140 ± 35</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1800) \to N\bar{K}^*(892)$, $S=1/2$, $S-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.18 ± 0.06</td><td>65 ± 40</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

Normalized residue in $N\bar{K} \to \Lambda(1800) \to N\bar{K}^*(892)$, $S=3/2$, $D-wave$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.09 ± 0.07</td><td></td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

Λ(1800) 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">1750 to 1850 (≈ 1800) OUR ESTIMATE</td></tr></tbody></table>

<table><tbody><tr><td>1811 ± 10</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>1783 ± 19</td><td>ZHANG</td><td>13A</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>1841 ± 10</td><td>GOPAL</td><td>80</td><td>DPWA <sup>K</sup> N → <sup>K</sup> N</td></tr><tr><td>1725 ± 20</td><td>ALSTON-...</td><td>78</td><td>DPWA <sup>K</sup> N → <sup>K</sup> N</td></tr><tr><td>1830 ± 20</td><td>LANGBEIN</td><td>72</td><td>IPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

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

<table><tbody><tr><td>1845 ± 10</td><td>MANLEY</td><td>02</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>1825 ± 20</td><td>GOPAL</td><td>77</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>1767 or 1842</td><td><sup>1</sup> MARTIN</td><td>77</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>1780</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr><tr><td>1872 ± 10</td><td>BRICMAN</td><td>70B</td><td>DPWA <sup>K</sup> N → <sup>K</sup> N</td></tr></tbody></table>

Λ(1800) 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">150 to 250 (≈ 200) OUR ESTIMATE</td></tr></tbody></table>

<table><tbody><tr><td>209 ± 18</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>256 ± 35</td><td>ZHANG</td><td>13A</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>228 ± 20</td><td>GOPAL</td><td>80</td><td>DPWA <sup>K</sup> N → <sup>K</sup> N</td></tr><tr><td>185 ± 20</td><td>ALSTON-...</td><td>78</td><td>DPWA <sup>K</sup> N → <sup>K</sup> N</td></tr><tr><td>70 ± 15</td><td>LANGBEIN</td><td>72</td><td>IPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

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

<table><tbody><tr><td>518 ± 84</td><td>MANLEY</td><td>02</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>230 ± 20</td><td>GOPAL</td><td>77</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>435 or 473</td><td><sup>1</sup> MARTIN</td><td>77</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>40</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr><tr><td>100 ± 20</td><td>BRICMAN</td><td>70B</td><td>DPWA <sup>K</sup> N → <sup>K</sup> N</td></tr></tbody></table>

Λ(1800) 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<sup>K</sup></td><td>25–40 %</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>seen</td></tr><tr><td>Γ<sub>3</sub> Λσ</td><td>(15 ± 4) %</td></tr><tr><td>Γ<sub>4</sub> Σ(1385)π</td><td>seen</td></tr><tr><td>Γ<sub>5</sub> Λη</td><td>0.01 to 0.10</td></tr><tr><td>Γ<sub>6</sub> N<sup>K</sup>*(892)</td><td>seen</td></tr><tr><td>Γ<sub>7</sub> N<sup>K</sup>*(892), S=1/2, S-wave</td><td></td></tr><tr><td>Γ<sub>8</sub> N<sup>K</sup>*(892), S=3/2, D-wave</td><td></td></tr></tbody></table>

Λ(1800) BRANCHING RATIOS

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

$\Gamma(N\bar{K})/\Gamma_{\text{total}} \qquad \Gamma_1/\Gamma$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">0.25 to 0.40 OUR ESTIMATE</td></tr><tr><td>0.35 ± 0.07</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>0.13 ± 0.06</td><td>ZHANG</td><td>13A</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>0.36 ± 0.04</td><td>GOPAL</td><td>80</td><td>DPWA <sup>K</sup> N → <sup>K</sup> N</td></tr><tr><td>0.28 ± 0.05</td><td>ALSTON-...</td><td>78</td><td>DPWA <sup>K</sup> N → <sup>K</sup> N</td></tr><tr><td>0.35 ± 0.15</td><td>LANGBEIN</td><td>72</td><td>IPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

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

<table><tbody><tr><td>0.24 ± 0.10</td><td>MANLEY</td><td>02</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>0.37 ± 0.05</td><td>GOPAL</td><td>77</td><td>DPWA See GOPAL 80</td></tr><tr><td>1.21 or 0.70</td><td><sup>1</sup> MARTIN</td><td>77</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>0.80</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr><tr><td>0.18 ± 0.02</td><td>BRICMAN</td><td>70B</td><td>DPWA <sup>K</sup> N → <sup>K</sup> N</td></tr></tbody></table>

$\Gamma(\Sigma\pi)/\Gamma_{\text{total}} \qquad \Gamma_2/\Gamma$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.27 ± 0.06</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

$\Gamma(\Lambda\sigma)/\Gamma_{\text{total}} \qquad \Gamma_3/\Gamma$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.15 ± 0.04</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

$\Gamma(\Sigma(1385)\pi)/\Gamma_{\text{total}} \qquad \Gamma_4/\Gamma$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.09 ± 0.04</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

$\Gamma(\Lambda\eta)/\Gamma_{\text{total}} \qquad \Gamma_5/\Gamma$

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td colspan="4">0.01 to 0.10 OUR ESTIMATE</td></tr><tr><td>0.010 ± 0.005</td><td>SARANTSEV</td><td>19</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>0.06 ± 0.05</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></tbody></table>

$\langle\Gamma_i\Gamma_f\rangle^{1/2}/\Gamma_{\text{total}}$ in $N\bar{K} \to \Lambda(1800) \to \Sigma\pi$ ($\Gamma_1\Gamma_2^{1/2}/\Gamma$)

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.07 ± 0.02</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.08 ± 0.05</td><td>GOPAL</td><td>77</td><td>DPWA <sup>K</sup> N multichannel</td></tr></tbody></table>

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

<table><tbody><tr><td>-0.74 or -0.43</td><td><sup>1</sup> MARTIN</td><td>77</td><td>DPWA <sup>K</sup> N multichannel</td></tr><tr><td>0.24</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr></tbody></table>

$\langle\Gamma_i\Gamma_f\rangle^{1/2}/\Gamma_{\text{total}}$ in $N\bar{K} \to \Lambda(1800) \to \Sigma(1385)\pi$ ($\Gamma_1\Gamma_4^{1/2}/\Gamma$)

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.09 ± 0.05</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>+0.056 ± 0.028</td><td><sup>2</sup> CAMERON</td><td>78</td><td>DPWA K<sup>-</sup> p → Σ(1385)π</td></tr></tbody></table>

$\langle\Gamma_i\Gamma_f\rangle^{1/2}/\Gamma_{\text{total}}$ in $N\bar{K} \to \Lambda(1800) \to N\bar{K}^*(892)$, $S=1/2$, $S-wave$ ($\Gamma_1\Gamma_7^{1/2}/\Gamma$)

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.13 ± 0.02</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>-0.17 ± 0.03</td><td><sup>2</sup> CAMERON</td><td>78B</td><td>DPWA K<sup>-</sup> p → N<sup>K</sup>^*</td></tr></tbody></table>

$\langle\Gamma_i\Gamma_f\rangle^{1/2}/\Gamma_{\text{total}}$ in $N\bar{K} \to \Lambda(1800) \to N\bar{K}^*(892)$, $S=3/2$, $D-wave$ ($\Gamma_1\Gamma_8^{1/2}/\Gamma$)

<table><thead><tr><th>VALUE</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>-0.13 ± 0.04</td><td>CAMERON</td><td>78B</td><td>DPWA K<sup>-</sup> p → N<sup>K</sup>^*</td></tr></tbody></table>

Λ(1800) FOOTNOTES

<footnote n="1">1 The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.</footnote>

<footnote n="2">2 The published sign has been changed to be in accord with the baryon-first convention.</footnote>
Λ(1800) 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>ZHANG</td><td>13A</td><td>PR C88 035205</td><td>H. Zhang et al.</td><td>(KSU)</td></tr><tr><td>MANLEY</td><td>02</td><td>PRL 88 012002</td><td>D.M. Manley et al.</td><td>(BNL Crystal Ball Collab.)</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>78</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 109</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>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>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>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>71</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>BRICMAN</td><td>70B</td><td>PL 33B 511</td><td>C. Bricman, M. Ferro-Luzzi, J.P. Lagnaux</td><td>(CERN) IJP</td></tr></table>

$$ \Lambda(1810) \ 1/2^+ $$

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

Λ(1810) 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>1773 ± 7</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>2097<sup>+40</sup><sub>-1</sub></td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr><tr><td>1780</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15. Solution B reports M = 1841<sup>+3</sup><sub>-4</sub> MeV.

-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>38 ± 14</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>166<sup>+64</sup><sub>-12</sub></td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr><tr><td>64</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15. Solution B Reports Γ = 62<sup>+6</sup><sub>-4</sub> MeV.

Λ(1810) POLE RESIDUES

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

Normalized residue in $N\bar{K} \to \Lambda(1810) \to N\bar{K}$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.018 ± 0.008</td><td>65 ± 26</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>0.205</td><td>-63</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 $N\bar{K} \to \Lambda(1810) \to \Sigma\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.045 ± 0.020</td><td>-143 ± 24</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>0.0325</td><td>29</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 $N\bar{K} \to \Lambda(1810) \to \Lambda\eta$

<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><td>• • •</td><td></td><td></td><td></td></tr><tr><td>0.155</td><td>165</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 $N\bar{K} \to \Lambda(1810) \to \Lambda\sigma$

<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 ± 0.020</td><td>30 ± 16</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 $N\bar{K} \to \Lambda(1810) \to \Xi\kappa$

<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><td>• • •</td><td></td><td></td><td></td></tr><tr><td>0.0937</td><td>-64</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 $N\bar{K} \to \Lambda(1810) \to \Sigma(1385)\pi$

<table><thead><tr><th>MODULUS</th><th>PHASE (°)</th><th>DOCUMENT ID</th><th>TECN</th><th>COMMENT</th></tr></thead><tbody><tr><td>0.08 ± 0.03</td><td>-50 ± 30</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>0.244</td><td>-10</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 $N\bar{K} \to \Lambda(1810) \to N\bar{K}^*(892)$, 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 <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>0.159</td><td>-97</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 $N\bar{K} \to \Lambda(1810) \to N\bar{K}^*(892)$, 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 ± 0.04</td><td></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>0.0497</td><td>2</td><td>1 KAMANO</td><td>15</td><td>DPWA Multichannel</td></tr></table>

¹ From the preferred solution A in KAMANO 15.

Λ(1810) MASS

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

1740 to 1840 (≈ 1790) OUR ESTIMATE

<table><tr><td>1773 ± 7</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr><tr><td>1821 ± 10</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>1841 ± 20</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>1735 ± 5</td><td>CARROLL</td><td>76</td><td>DPWA Isospin-0 total σ</td></tr><tr><td>1746 ± 10</td><td>PREVOST</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span> N → Σ(1385) π</td></tr><tr><td>1780 ± 20</td><td>LANGBEIN</td><td>72</td><td>IPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr></table>

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

<table><tr><td>1853 ± 20</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr><tr><td>1861 or 1953</td><td>1 MARTIN</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr><tr><td>1755</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr><tr><td>1800</td><td>ARMENTEROS70</td><td>HBC</td><td><span style="text-decoration: overline;">K</span> N → <span style="text-decoration: overline;">K</span> N</td></tr><tr><td>1750</td><td>ARMENTEROS70</td><td>HBC</td><td><span style="text-decoration: overline;">K</span> N → Σπ</td></tr><tr><td>1690 ± 10</td><td>BARBARO-...</td><td>70</td><td>HBC <span style="text-decoration: overline;">K</span> N → Σπ</td></tr><tr><td>1740</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>1745</td><td>ARMENTEROS68B</td><td>HBC</td><td><span style="text-decoration: overline;">K</span> N → <span style="text-decoration: overline;">K</span> N</td></tr></table>

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

Λ(1810) WIDTH

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

50 to 170 (≈ 110) OUR ESTIMATE

<table><tr><td>39 ± 15</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr><tr><td>174 ± 50</td><td>ZHANG</td><td>13A</td><td>DPWA Multichannel</td></tr><tr><td>164 ± 20</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>90 ± 20</td><td>CAMERON</td><td>78B</td><td>DPWA <span style="text-decoration: overline;">K</span> N → Σ(1385) π</td></tr><tr><td>46 ± 20</td><td>PREVOST</td><td>74</td><td>DPWA <span style="text-decoration: overline;">K</span> N → Σ(1385) π</td></tr><tr><td>120 ± 10</td><td>LANGBEIN</td><td>72</td><td>IPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr></table>

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

<table><tr><td>166 ± 20</td><td>GOPAL</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr><tr><td>535 or 585</td><td>1 MARTIN</td><td>77</td><td>DPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr><tr><td>28</td><td>CARROLL</td><td>76</td><td>DPWA Isospin-0 total σ</td></tr><tr><td>35</td><td>KIM</td><td>71</td><td>DPWA K-matrix analysis</td></tr><tr><td>30</td><td>ARMENTEROS70</td><td>HBC</td><td><span style="text-decoration: overline;">K</span> N → <span style="text-decoration: overline;">K</span> N</td></tr><tr><td>70</td><td>ARMENTEROS70</td><td>HBC</td><td><span style="text-decoration: overline;">K</span> N → Σπ</td></tr><tr><td>22</td><td>BARBARO-...</td><td>70</td><td>HBC <span style="text-decoration: overline;">K</span> N → Σπ</td></tr><tr><td>300</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>147</td><td>ARMENTEROS68B</td><td>HBC</td><td></td></tr></table>

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

Λ(1810) 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>0.05 to 0.35</td></tr><tr><td>Γ<sub>2</sub> Σπ</td><td>(16 ± 5) %</td></tr><tr><td>Γ<sub>3</sub> Λη</td><td></td></tr><tr><td>Γ<sub>4</sub> Ξ<span style="text-decoration: overline;">K</span></td><td></td></tr><tr><td>Γ<sub>5</sub> Σ(1385)π</td><td>(40 ± 15) %</td></tr><tr><td>Γ<sub>6</sub> N<span style="text-decoration: overline;">K</span>*(892)</td><td>30–60 %</td></tr></tbody></table>



Λ(1810) BRANCHING RATIOS

<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></table>

0.05 to 0.35 OUR ESTIMATE

<table><tr><td>0.025 ± 0.013</td><td>SARANTSEV</td><td>19</td><td>DPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr><tr><td>0.19 ± 0.08</td><td>ZHANG</td><td>13A</td><td>DPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr><tr><td>0.24 ± 0.04</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>0.36 ± 0.05</td><td>LANGBEIN</td><td>72</td><td>IPWA <span style="text-decoration: overline;">K</span> N multichannel</td></tr></table>