Chiral dynamics and the S11(1535) nucleon resonance

N. Kaiser; P. B. Siegel; W. Weise

doi:10.1016/0370-2693(95)01203-3

Chiral dynamics and the S₁₁(1535) nucleon resonance

N. Kaiser, P. B. Siegel, W. Weise

Technical University of Munich

Research output: Contribution to journal › Article › peer-review

314 Scopus citations

Abstract

The SU(3) chiral effective lagrangian at next-to-leading order is applied to the S-wave meson-baryon interaction in the energy range around the ηN threshold. A potential is derived from this lagrangian and used in a coupled channel calculation of the πN, ηN, KΛ, KΣ system in the isospin- 1 2, l = 0 partial wave. Using the same parameters as obtained previously from a fit to the low energy KN data it is found that a quasi-bound KΣ-KΛ-state is formed, with properties remarkably similar to the S₁₁(1535) nucleon resonance. In particular, we find a large partial decay width into ηN consistent with the empirical data.

Original language	English
Pages (from-to)	23-28
Number of pages	6
Journal	Physics Letters B
Volume	362
Issue number	1-4
DOIs	https://doi.org/10.1016/0370-2693(95)01203-3
State	Published - 9 Nov 1995

Keywords

Chiral dynamics
Coupled channel S-matrix
Eta meson production
Kaon-hyperon bound state
Nucleon resonances

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10.1016/0370-2693(95)01203-3

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title = "Chiral dynamics and the S11(1535) nucleon resonance",

abstract = "The SU(3) chiral effective lagrangian at next-to-leading order is applied to the S-wave meson-baryon interaction in the energy range around the ηN threshold. A potential is derived from this lagrangian and used in a coupled channel calculation of the πN, ηN, KΛ, KΣ system in the isospin- 1 2, l = 0 partial wave. Using the same parameters as obtained previously from a fit to the low energy KN data it is found that a quasi-bound KΣ-KΛ-state is formed, with properties remarkably similar to the S11(1535) nucleon resonance. In particular, we find a large partial decay width into ηN consistent with the empirical data.",

keywords = "Chiral dynamics, Coupled channel S-matrix, Eta meson production, Kaon-hyperon bound state, Nucleon resonances",

author = "N. Kaiser and Siegel, {P. B.} and W. Weise",

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T1 - Chiral dynamics and the S11(1535) nucleon resonance

AU - Kaiser, N.

AU - Siegel, P. B.

AU - Weise, W.

PY - 1995/11/9

Y1 - 1995/11/9

N2 - The SU(3) chiral effective lagrangian at next-to-leading order is applied to the S-wave meson-baryon interaction in the energy range around the ηN threshold. A potential is derived from this lagrangian and used in a coupled channel calculation of the πN, ηN, KΛ, KΣ system in the isospin- 1 2, l = 0 partial wave. Using the same parameters as obtained previously from a fit to the low energy KN data it is found that a quasi-bound KΣ-KΛ-state is formed, with properties remarkably similar to the S11(1535) nucleon resonance. In particular, we find a large partial decay width into ηN consistent with the empirical data.

AB - The SU(3) chiral effective lagrangian at next-to-leading order is applied to the S-wave meson-baryon interaction in the energy range around the ηN threshold. A potential is derived from this lagrangian and used in a coupled channel calculation of the πN, ηN, KΛ, KΣ system in the isospin- 1 2, l = 0 partial wave. Using the same parameters as obtained previously from a fit to the low energy KN data it is found that a quasi-bound KΣ-KΛ-state is formed, with properties remarkably similar to the S11(1535) nucleon resonance. In particular, we find a large partial decay width into ηN consistent with the empirical data.

KW - Chiral dynamics

KW - Coupled channel S-matrix

KW - Eta meson production

KW - Kaon-hyperon bound state

KW - Nucleon resonances

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U2 - 10.1016/0370-2693(95)01203-3

DO - 10.1016/0370-2693(95)01203-3

M3 - Article

AN - SCOPUS:0001963161

SN - 0370-2693

VL - 362

SP - 23

EP - 28

JO - Physics Letters B

JF - Physics Letters B

IS - 1-4

ER -

Chiral dynamics and the S₁₁(1535) nucleon resonance

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Keywords

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