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

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.

33 pages, 15 figures; added discussion on new double-polarization data (Cx and Cz) in Section IV

References in corpus (1)

• Measurement of the reaction gamma p --> K0 Sigma+ at photon energies up to 2.6 GeV

Cited by in corpus (14)

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• Electroproduction of kaons from the proton in a Regge-plus-resonance approach
• Electromagnetic production of $K\Sigma$ on the nucleon near threshold
• Theoretical study of the $\Lambda$(1520) photoproduction off proton target based on the new CLAS data
• Evidence for the tensor meson exchange in the kaon photoproduction
• Regge-plus-resonance predictions for kaon photoproduction from the neutron
• $K^{+}\Lambda$ electroproduction above the resonance region
• Photon induced K$\Lambda$ production on the proton in the low energy region
• Bayesian model selection for electromagnetic kaon production on the nucleon
• The strangeness program at GlueX
• Measurement of the Photon Beam Asymmetry in $\vec{\gamma }p\to K^{+}{\Sigma }^0$ at $E_{\gamma }=8.5$ GeV
• Kaon photoproduction from the deuteron in a Regge-plus-resonance approach