Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)

I (J P ) = 0( 25 − ) Status:

Λ(1830) 5/2−∗∗∗∗

For results published before 1973 (they are now obsolete), see our1982 edition Physics Letters 111B 1 (1982).
The best evidence for this resonance is in the Σ π channel.

Λ(1830) POLE POSITIONREAL PARTVALUE (MeV)

DOCUMENT ID

TECNCOMMENT

1800 to 1860 (≈ 1830) OUR ESTIMATE
1819.5± 3.0
SARANTSEV 19 DPWA K N multichannel+35
1 KAMANO
1899 − 37
15 DPWA Multichannel• • • We do not use the following data for averages, fits, limits, etc. • • •37
2 KAMANO
1766 +
15 DPWA Multichannel− 34
1809
ZHANG
13A DPWA Multichannel
1 The preferred solution A in KAMANO 15 reports two poles. This entry is from thepreferred solution A.
2 From the preferred solution A in KAMANO 15. Not seen in solution B.

−2×IMAGINARY PARTVALUE (MeV)

DOCUMENT ID

TECNCOMMENT

50 to 80 (≈ 65) OUR ESTIMATE
62± 5
SARANTSEV 19 DPWA K N multichannel+100
180 − 34
KAMANO
15 DPWA Multichannel• • • We do not use the following data for averages, fits, limits, etc. • • •94
212 +− 62

2 KAMANO

15

DPWA Multichannel

109
ZHANG
13A DPWA Multichannel
1 The preferred solution A in KAMANO 15 reports two poles. This entry is from thepreferred solution A.
2 From the preferred solution A in KAMANO 15. Not seen in solution B.

Λ(1830) POLE RESIDUESThe normalized residue is the residue divided by Γpole /2.

Normalized residue in N K → Λ(1830) → N K
MODULUSPHASE (◦ )DOCUMENT ID

TECNCOMMENT

0.055 ± 0.010 20 ± 14
SARANTSEV 19 DPWA K N multichannel• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.00502− 8015 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

https://pdg.lbl.gov

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Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)

Normalized residue in N K → Λ(1830) → Σ π
MODULUSPHASE (◦ )DOCUMENT ID

TECNCOMMENT

0.15± 0.03 180 ± 10
SARANTSEV 19 DPWA K N multichannel• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.00581179
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Normalized residue in N K → Λ(1830) → Λ η
MODULUSPHASE (◦ )DOCUMENT ID

TECNCOMMENT• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.00941− 65
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Normalized residue in N K → Λ(1830) → Ξ K
MODULUSPHASE (◦ )DOCUMENT ID

TECNCOMMENT

0.010 ± 0.005 65 ± 20
SARANTSEV 19 DPWA K N multichannel• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.047794
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Normalized residue in N K → Λ(1830) → Σ (1385)π , D-wave
MODULUSPHASE (◦ )DOCUMENT ID

TECNCOMMENT

0.10 ± 0.04 10 ± 25
SARANTSEV 19 DPWA K N multichannel• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.0237113
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Normalized residue in N K → Λ(1830) → Σ (1385)π , G-wave
MODULUSPHASE (◦ )DOCUMENT ID

TECNCOMMENT

0.03± 0.02SARANTSEV 19 DPWA K N multichannel• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.000726
127
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Normalized residue in N K → Λ(1830) → N K ∗ (892), S=1/2 , D-wave
MODULUSPHASE (◦ )DOCUMENT ID

TECNCOMMENT• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.0278− 177
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Normalized residue in N K → Λ(1830) → N K ∗ (892), S=3/2 , D-wave
MODULUSPHASE (◦ )DOCUMENT ID

TECNCOMMENT• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.0255315 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

https://pdg.lbl.gov

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Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)

Normalized residue in N K → Λ(1830) → N K ∗ (892), S=3/2 , G-wave
MODULUSPHASE (◦ )DOCUMENT ID

TECNCOMMENT• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.00773− 17
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Normalized residue in N K → Λ(1830) → Λ ω , S=1/2 , D-wave
MODULUSPHASE (◦ )0.04± 0.03

DOCUMENT ID

SARANTSEV

TECN

19

COMMENTDPWA K N multichannel

Normalized residue in N K → Λ(1830) → Λ ω , S=3/2 , D-wave
MODULUSPHASE (◦ )DOCUMENT ID

0.05± 0.03

− 110 ± 35

SARANTSEVTECN19COMMENTDPWA K N multichannelΛ(1830) MASSVALUE (MeV)

DOCUMENT ID

TECNCOMMENT

1820 to 1830 (≈ 1825) OUR ESTIMATE
1821± 3SARANTSEV 19 DPWA K N multichannel
1820± 4ZHANG
13A DPWA Multichannel
1831± 10GOPAL
80 DPWA K N → K N
1825± 10GOPAL
77 DPWA K N multichannel
1825± 1KANE
74 DPWA K − p → Σ π• • • We do not use the following data for averages, fits, limits, etc. • • •1 MARTIN
1817 or 1818
77 DPWA K N multichannel
1 The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

Λ(1830) WIDTHVALUE (MeV)

DOCUMENT ID

TECNCOMMENT

60 to 120 (≈ 90) OUR ESTIMATE
64± 7
SARANTSEV 19 DPWA K N multichannel
114± 10ZHANG
13A DPWA Multichannel
100± 10GOPAL
80 DPWA K N → K N
94± 10GOPAL
77 DPWA K N multichannel
119± 3KANE
74 DPWA K − p → Σ π• • • We do not use the following data for averages, fits, limits, etc. • • •1 MARTIN56 or 56
77 DPWA K N multichannel
1 The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.

Λ(1830) DECAY MODESΓ1Γ2
Γ3Γ4ModeFraction (Γi /Γ)NKΣπΞKΣ (1385)π0.04 to 0.08

https://pdg.lbl.gov

Scale factor

35–75 %
>15 %Page 3Created: 5/31/2024 10:12

Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)

Γ5
Γ6
Γ7
Γ8
Γ9Γ10

Σ (1385)π , D-wave
Σ (1385)π , G-wave
ΛηN K ∗ (892), S=1/2, D-wave
N K ∗ (892), S=3/2, D-wave
N K ∗ (892), S=3/2, G-wave(40± 15) %3.2

Λ(1830) BRANCHING RATIOS
See “Sign conventions for resonance couplings” in the Note on Λ and ΣResonances.

Γ N K /Γtotal
VALUE

Γ1 /Γ
DOCUMENT ID

TECNCOMMENT

0.04 to 0.08 OUR ESTIMATE
0.055± 0.010
SARANTSEV 19 DPWA K N multichannel
0.041± 0.005
ZHANG
13A DPWA Multichannel
0.08 ± 0.03
GOPAL
80 DPWA K N → K N
0.02 ± 0.02
ALSTON-...
78 DPWA K N → K N• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO0.006
15 DPWA Multichannel
0.04 ± 0.03
GOPAL
77 DPWA See GOPAL 80
2 MARTIN
0.04 or 0.04
77 DPWA K 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.

Γ Σ π /Γtotal
VALUE

Γ2 /Γ
DOCUMENT ID

TECNCOMMENT

0.42 ± 0.08
SARANTSEV 19 DPWA K N multichannel• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.017
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Γ Ξ K /Γtotal
VALUE

Γ3 /Γ
DOCUMENT ID

TECNCOMMENT• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.562
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Γ Σ (1385)π , D-wave /Γtotal
VALUE

Γ5 /Γ
DOCUMENT ID

TECNCOMMENT

0.40 ± 0.15 OUR AVERAGE Error includes scale factor of 3.2.
0.20 ± 0.08
SARANTSEV 19 DPWA K N multichannel
0.52 ± 0.06
ZHANG
13A DPWA Multichannel• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.134
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

https://pdg.lbl.gov

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Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)Γ Σ (1385)π , G-wave /Γtotal

Γ6 /Γ

VALUE

DOCUMENT ID

0.020± 0.015

SARANTSEV

TECN

19

COMMENTDPWA K N multichannelΓ Λ η /Γtotal
VALUE

Γ7 /Γ
DOCUMENT ID

TECNCOMMENT• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.024
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Γ N K ∗ (892), S=1/2, D-wave /Γtotal
VALUE

DOCUMENT ID

Γ8 /Γ
TECN

COMMENT• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.134
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Γ N K ∗ (892), S=3/2, D-wave /Γtotal
VALUE

DOCUMENT ID

Γ9 /Γ
TECN

COMMENT• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO0.115
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.

Γ N K ∗ (892), S=3/2, G-wave /ΓtotalVALUEDOCUMENT ID

Γ10 /Γ
TECNCOMMENT• • • We do not use the following data for averages, fits, limits, etc. • • •1 KAMANO
0.009
15 DPWA Multichannel
1 From the preferred solution A in KAMANO 15.
1/(Γi Γf ) 2 /Γtotal in N K → Λ(1830) → Σ π
VALUE

DOCUMENT ID

1/(Γ1 Γ2 ) 2 /ΓTECN

COMMENT− 0.13± 0.01
ZHANG
13A DPWA Multichannel− 0.17± 0.03
GOPAL
77 DPWA K N multichannel− 0.15± 0.01
KANE
74 DPWA K − p → Σ π• • • We do not use the following data for averages, fits, limits, etc. • • •1 MARTIN− 0.17 or − 0.17
77 DPWA K N multichannel
1 The two MARTIN 77 values are from a T-matrix pole and from a Breit-Wigner fit.
1/(Γi Γf ) 2 /Γtotal in N K → Λ(1830) → Σ (1385)πVALUE

DOCUMENT ID

1/(Γ1 Γ4 ) 2 /ΓTECN

COMMENT

0.20 to 0.50 OUR ESTIMATE
1 CAMERON+ 0.141± 0.014
78 DPWA K − p → Σ (1385) π+ 0.13 ± 0.03
PREVOST
74 DPWA K − N → Σ (1385) π
1 The CAMERON 78 upper limit on G-wave decay is 0.03. The published sign has beenchanged to be in accord with the baryon-first convention.

https://pdg.lbl.gov

Page 5Created: 5/31/2024 10:12

Citation: S. Navas et al. (Particle Data Group), Phys. Rev. D 110, 030001 (2024)
1/(Γi Γf ) 2 /Γtotal in N K → Λ(1830) → Λ ηVALUEDOCUMENT ID− 0.044± 0.020

RADER1/(Γ1 Γ7 ) 2 /ΓTECN73MPWA

Λ(1830) REFERENCESSARANTSEVKAMANOZHANG
PDG
GOPAL
ALSTON-...
Also
CAMERON
GOPAL
MARTIN
Also
Also
KANE
PREVOST
RADER

191513A
828078787777747473

EPJ A55 180
PR C92 025205
PR C88 035205
PL 111B 1
Toronto Conf. 159
PR D18 182
PRL 38 1007
NP B143 189
NP B119 362
NP B127 349
NP B126 266
NP B126 285
LBL-2452
NP B69 246
NC 16A 178

https://pdg.lbl.gov

A.V. Sarantsev et al.
(BONN, PNPI)
H. Kamano et al.
(ANL, OSAK)
H. Zhang et al.
(KSU)
M. Roos et al.
(HELS, CIT, CERN)
G.P. Gopal(RHEL) IJP
M. Alston-Garnjost et al.
(LBL, MTHO+) IJP
M. Alston-Garnjost et al.
(LBL, MTHO+) IJP
W. Cameron et al.
(RHEL, LOIC) 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
D.F. Kane(LBL) IJP
J. Prevost et al.
(SACL, CERN, HEID)
R.K. Rader et al.
(SACL, HEID, CERN+)

Page 6Created: 5/31/2024 10:12