dorsal/arxiv
View SchemaNon-perturbative chiral approach to Kp -->gamma Y reactions
| Authors | T. -S. H. Lee, J. A. Oller, E. Oset, A. Ramos |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9804053 |
| URL | https://arxiv.org/abs/nucl-th/9804053 |
| DOI | 10.1016/S0375-9474(98)00581-8 |
| Journal | Nucl.Phys. A643 (1998) 402-414 |
Abstract
A recently developed nonperturbative chiral approach to describe the S=-1 meson-baryon reactions has been extended to investigate the near threshold $K^- p \to \gamma \Lambda, \gamma \Sigma^0$ reactions. With the parameters governed by chiral SU(3) symmetry, we show that the predicted branching ratios $\Gamma_{K^- p \to \gamma \Lambda}/\Gamma_{K^- p \to all}$ and $\Gamma_{K^-p\to \gamma \Sigma^0}/\Gamma_{K^- p \to all}$ are close to the experimental values. The coupling with the $\eta$ channels, which was shown to be important in the $S=-1$ meson-baryon reactions, is also found to be significant here. Our results are consistent with the interpretation of the $\Lambda(1405)$ as a quasi-bound meson-baryon state as found in other similar chiral approaches.
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"abstract": "A recently developed nonperturbative chiral approach to describe the S=-1\nmeson-baryon reactions has been extended to investigate the near threshold $K^-\np \\to \\gamma \\Lambda, \\gamma \\Sigma^0$ reactions. With the parameters governed\nby chiral SU(3) symmetry, we show that the predicted branching ratios\n$\\Gamma_{K^- p \\to \\gamma \\Lambda}/\\Gamma_{K^- p \\to all}$ and $\\Gamma_{K^-p\\to\n\\gamma \\Sigma^0}/\\Gamma_{K^- p \\to all}$ are close to the experimental values.\nThe coupling with the $\\eta$ channels, which was shown to be important in the\n$S=-1$ meson-baryon reactions, is also found to be significant here. Our\nresults are consistent with the interpretation of the $\\Lambda(1405)$ as a\nquasi-bound meson-baryon state as found in other similar chiral approaches.",
"arxiv_id": "nucl-th/9804053",
"authors": [
"T. -S. H. Lee",
"J. A. Oller",
"E. Oset",
"A. Ramos"
],
"categories": [
"nucl-th"
],
"doi": "10.1016/S0375-9474(98)00581-8",
"journal_ref": "Nucl.Phys. A643 (1998) 402-414",
"title": "Non-perturbative chiral approach to Kp --\u003egamma Y reactions",
"url": "https://arxiv.org/abs/nucl-th/9804053"
},
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