dorsal/arxiv
View SchemaThe N*(1520) ---> Delta pi Amplitudes Extracted from the gamma p ---> pi+ pi- p Reaction and Comparison to Quark Models
| Authors | J. A. Gomez Tejedor, F. Cano, E. Oset |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9510007 |
| URL | https://arxiv.org/abs/nucl-th/9510007 |
| DOI | 10.1016/0370-2693(96)00404-2 |
| Journal | Phys.Lett. B379 (1996) 39-44 |
Abstract
The gamma p ---> pi+ pi- p reaction, in combination with data from the pi N ---> pi pi N reaction, allows one to obtain the s- and d-wave amplitudes for the N*(1520) decay into Delta pi with absolute sign with respect to the N*(1520) ---> N gamma helicity amplitudes. In addition one obtains the novel information on the q dependence of the amplitudes. This dependence fits exactly with the predictions of the non-relativistic constituent quark models. The absolute values provided by these models agree only qualitatively, and a discussion is done on the reasons for it and possible ways to improve.
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"abstract": "The gamma p ---\u003e pi+ pi- p reaction, in combination with data from the pi N\n---\u003e pi pi N reaction, allows one to obtain the s- and d-wave amplitudes for\nthe N*(1520) decay into Delta pi with absolute sign with respect to the\nN*(1520) ---\u003e N gamma helicity amplitudes. In addition one obtains the novel\ninformation on the q dependence of the amplitudes. This dependence fits exactly\nwith the predictions of the non-relativistic constituent quark models. The\nabsolute values provided by these models agree only qualitatively, and a\ndiscussion is done on the reasons for it and possible ways to improve.",
"arxiv_id": "nucl-th/9510007",
"authors": [
"J. A. Gomez Tejedor",
"F. Cano",
"E. Oset"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1016/0370-2693(96)00404-2",
"journal_ref": "Phys.Lett. B379 (1996) 39-44",
"title": "The N*(1520) ---\u003e Delta pi Amplitudes Extracted from the gamma p ---\u003e pi+ pi- p Reaction and Comparison to Quark Models",
"url": "https://arxiv.org/abs/nucl-th/9510007"
},
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