Regge-plus-resonance treatment of the p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ reactions at forward kaon angles

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dc.creatorCorthals, T.
dc.creatorIreland, D. G.
dc.creatorVan Cauteren, T.
dc.creatorRyckebusch, J.
dc.date2006-12-19
dc.date2007-09-25
dc.date.accessioned2026-07-07T11:23:57Z
dc.date.available2026-07-07T11:23:57Z
dc.descriptionAn 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.
dc.description33 pages, 15 figures; added discussion on new double-polarization data (Cx and Cz) in Section IV
dc.identifierhttps://arxiv.org/abs/nucl-th/0612085
dc.identifierhttp://arxiv.org/abs/nucl-th/0612085
dc.identifierPhys.Rev.C75:045204,2007
dc.identifierdoi:10.1103/PhysRevC.75.045204
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195068
dc.subjectNuclear Theory
dc.titleRegge-plus-resonance treatment of the p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ reactions at forward kaon angles
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