dorsal/arxiv
View SchemaChiral Unitary Approach To The N*N*pi, N*N*eta Couplings For The N*(1535) Resonance
| Authors | J. C. Nacher, A. Parreno, E. Oset, A. Ramos, A. Hosaka, M. Oka |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9906018 |
| URL | https://arxiv.org/abs/nucl-th/9906018 |
| DOI | 10.1016/S0375-9474(00)00311-0 |
| Journal | Nucl.Phys. A678 (2000) 187-211 |
Abstract
Using a chiral unitary model in which the negative parity nucleon resonance $N^\ast \equiv N^\ast(1535)$ is generated dynamically by means of the Bethe Salpeter equation with coupled meson baryon channels in the $S = 0$ sector, we have obtained the $\pi^0 N^\ast N^\ast$ and $\eta N^\ast N^\ast$ couplings. The $\pi^0 N^\ast N^\ast$ coupling has smaller strength and the same sign as the $\pi^0 N N$ coupling. This rules out the mirror assignment of chiral symmetry where the ground state nucleon $N$ and the negative parity resonance $N^\ast$ are envisaged as chiral partners in the baryon sector.
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"abstract": "Using a chiral unitary model in which the negative parity nucleon resonance\n$N^\\ast \\equiv N^\\ast(1535)$ is generated dynamically by means of the Bethe\nSalpeter equation with coupled meson baryon channels in the $S = 0$ sector, we\nhave obtained the $\\pi^0 N^\\ast N^\\ast$ and $\\eta N^\\ast N^\\ast$ couplings. The\n$\\pi^0 N^\\ast N^\\ast$ coupling has smaller strength and the same sign as the\n$\\pi^0 N N$ coupling. This rules out the mirror assignment of chiral symmetry\nwhere the ground state nucleon $N$ and the negative parity resonance $N^\\ast$\nare envisaged as chiral partners in the baryon sector.",
"arxiv_id": "nucl-th/9906018",
"authors": [
"J. C. Nacher",
"A. Parreno",
"E. Oset",
"A. Ramos",
"A. Hosaka",
"M. Oka"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0375-9474(00)00311-0",
"journal_ref": "Nucl.Phys. A678 (2000) 187-211",
"title": "Chiral Unitary Approach To The N*N*pi, N*N*eta Couplings For The N*(1535) Resonance",
"url": "https://arxiv.org/abs/nucl-th/9906018"
},
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