Regge-model predictions for K+Sigma photoproduction from the nucleon

TL;DR

This paper uses a Regge-model with minimal parameters to predict differential cross sections and asymmetries for K+Sigma photoproduction from nucleons, extending understanding of these reactions in the resonance region.

Contribution

It introduces a Regge-model with only three free parameters to predict K+Sigma photoproduction observables, fitted to existing data and extended to neutron reactions via isospin symmetry.

Findings

Predicted differential cross sections match available data.

Photon-beam asymmetries are successfully modeled.

Model provides a basis for future experimental comparisons.

Abstract

We present Regge-model predictions for the p(gamma,K+)Sigma0 and n(gamma,K+)Sigma- differential cross sections and photon-beam asymmetries in the resonance region. The reaction amplitude encompasses the exchange of K+(494) and K*+(892) Regge-trajectories, introducing a mere three free parameters. These are fitted to the available p(gamma,K+)Sigma0 data beyond the resonance region. The n(gamma,K+)Sigma- amplitude is obtained from the p(gamma,K+)Sigma0 one through SU(2) isospin symmetry considerations.