Regge-plus-resonance treatment of the p(γ,K+)Σ0 and p(γ,K0)Σ+ reactions at forward kaon angles

Corthals, T., Van Cauteren, T., Ryckebusch, J. and Ireland, D. G. (2007) Regge-plus-resonance treatment of the p(γ,K+)Σ0 and p(γ,K0)Σ+ reactions at forward kaon angles. Physical Review C, 75(4), 045204. (doi: 10.1103/PhysRevC.75.045204)

Abstract

An effective-Lagrangian framework for K Σ 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 ( γ , K + ) Σ 0 and p ( γ , K 0 ) Σ + 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 toward 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 + Σ 0 and K 0 Σ + photoproduction channels over an extensive energy range.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Ireland, Professor David
• Authors: Corthals, T., Van Cauteren, T., Ryckebusch, J., and Ireland, D. G.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review C
• Publisher: American Physical Society
• ISSN: 0556-2813
• ISSN (Online): 1089-490X
• Published Online: 13 April 2007