dorsal/arxiv
View SchemaRegge-plus-resonance treatment of the p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ reactions at forward kaon angles
| Authors | T. Corthals, D. G. Ireland, T. Van Cauteren, J. Ryckebusch |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0612085 |
| URL | https://arxiv.org/abs/nucl-th/0612085 |
| DOI | 10.1103/PhysRevC.75.045204 |
| Journal | Phys.Rev.C75:045204,2007 |
Abstract
An effective-Lagrangian framework for K Sigma photoproduction from the proton is presented. The proposed model is applicable at forward kaon angles and photon lab energies from threshold up to 16 GeV. The high-energy part of the p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ amplitudes is expressed in terms of Regge-trajectory exchange in the t channel. By supplementing this Regge background with a number of s-channel resonances, the model is extended towards the resonance region. The resulting ``Regge-plus-resonance'' (RPR) approach has the advantage that the background contributions involve only a few parameters, which can be largely constrained by the high-energy data. This work compares various implementations of the RPR model, and explores which resonance contributions are required to fit the data presently at hand. It is demonstrated that, through the inclusion of one K and two K* trajectories, the RPR framework provides an efficient and unified description of the K^+ Sigma^0 and K^0 Sigma^+ photoproduction channels over an extensive energy range.
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"abstract": "An effective-Lagrangian framework for K Sigma photoproduction from the proton\nis presented. The proposed model is applicable at forward kaon angles and\nphoton lab energies from threshold up to 16 GeV. The high-energy part of the\np(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ amplitudes is expressed in terms of\nRegge-trajectory exchange in the t channel. By supplementing this Regge\nbackground with a number of s-channel resonances, the model is extended towards\nthe resonance region. The resulting ``Regge-plus-resonance\u0027\u0027 (RPR) approach has\nthe advantage that the background contributions involve only a few parameters,\nwhich can be largely constrained by the high-energy data. This work compares\nvarious implementations of the RPR model, and explores which resonance\ncontributions are required to fit the data presently at hand. It is\ndemonstrated that, through the inclusion of one K and two K* trajectories, the\nRPR framework provides an efficient and unified description of the K^+ Sigma^0\nand K^0 Sigma^+ photoproduction channels over an extensive energy range.",
"arxiv_id": "nucl-th/0612085",
"authors": [
"T. Corthals",
"D. G. Ireland",
"T. Van Cauteren",
"J. Ryckebusch"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.75.045204",
"journal_ref": "Phys.Rev.C75:045204,2007",
"title": "Regge-plus-resonance treatment of the p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ reactions at forward kaon angles",
"url": "https://arxiv.org/abs/nucl-th/0612085"
},
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