dorsal/arxiv
View SchemaA coupled K-matrix description of the reactions pi+N -> pi+N, pi+N -> eta+N, gamma+N -> pi+N and gamma+N -> eta+N
| Authors | A. M. Green, S. Wycech |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9905011 |
| URL | https://arxiv.org/abs/nucl-th/9905011 |
| DOI | 10.1103/PhysRevC.60.035208 |
| Journal | Phys.Rev. C60 (1999) 035208 |
Abstract
The coupled pi+N, eta+N, gamma+N systems are described by a K-matrix method. The parameters in this model are adjusted to get an optimal fit to pi+N -> pi+N, pi+N -> eta+N, gamma+N -> pi+N and gamma+N -> eta+N data in an energy range of about 100 MeV each side of the eta-threshold. The coupling of photons to the N(1535) state is extracted and also an alternative to the current S11(gamma+N -> pi+N) amplitudes suggested. Expansions are given for the eta-eta and gamma-eta amplitudes in terms of the eta-momentum. Effects of interference of this state with background potential interactions are discussed and experimental consequences are indicated.
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"abstract": "The coupled pi+N, eta+N, gamma+N systems are described by a K-matrix method.\nThe parameters in this model are adjusted to get an optimal fit to pi+N -\u003e\npi+N, pi+N -\u003e eta+N, gamma+N -\u003e pi+N and gamma+N -\u003e eta+N data in an energy\nrange of about 100 MeV each side of the eta-threshold. The coupling of photons\nto the N(1535) state is extracted and also an alternative to the current\nS11(gamma+N -\u003e pi+N) amplitudes suggested. Expansions are given for the eta-eta\nand gamma-eta amplitudes in terms of the eta-momentum. Effects of interference\nof this state with background potential interactions are discussed and\nexperimental consequences are indicated.",
"arxiv_id": "nucl-th/9905011",
"authors": [
"A. M. Green",
"S. Wycech"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.60.035208",
"journal_ref": "Phys.Rev. C60 (1999) 035208",
"title": "A coupled K-matrix description of the reactions pi+N -\u003e pi+N, pi+N -\u003e eta+N, gamma+N -\u003e pi+N and gamma+N -\u003e eta+N",
"url": "https://arxiv.org/abs/nucl-th/9905011"
},
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