Regge-plus-resonance predictions for kaon photoproduction from the neutron

Abstract

We present predictions for n(gamma,K+)Sigma- differential cross sections and photon-beam asymmetries and compare them to recent LEPS data. We adapt a Regge-plus-resonance (RPR) model developed to describe photoinduced and electroinduced kaon production off protons. The non-resonant contributions to the amplitude are modelled in terms of K+(494) and K*+(892) Regge-trajectory exchange. This amplitude is supplemented with a selection of s-channel resonance diagrams. The three Regge-model parameters of the n(gamma,K+)Sigma- amplitude are derived from the ones fitted to proton data through SU(2) isospin considerations. A fair description of the n(gamma,K+)Sigma- data is realized, which demonstrates the Regge model's robustness and predictive power. Conversion of the resonances' couplings from the proton to the neutron is more challenging, as it requires knowledge of the photocoupling helicity amplitudes. We illustrate how the uncertainties of the helicity amplitudes propagate and heavily restrain the predictive power of the RPR and isobar models for kaon production off neutron targets.

arXiv comment14 pages, 4 figures; Minor revisions; Published in Physics Letters B

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Cited by in corpus (10)

• Possible $\Sigma ({\frac{1}{2}}^{-})$ under the ${\Sigma }^{\ast }(1385)$ peak in $K{\Sigma }^{\ast }$ photoproduction
• A Bayesian analysis of kaon photoproduction with the Regge-plus-resonance model
• P-wave excited baryons from pion- and photo-induced hyperon production
• Electromagnetic production of kaon near threshold
• Differential cross section of gamma n to K+ Sigma- on bound neutrons with incident photons from 1.1 to 3.6 GeV
• $\eta$ production off the proton in a Regge-plus-chiral quark approach
• Bayesian model selection for electromagnetic kaon production on the nucleon
• Kaon photoproduction from the deuteron in a Regge-plus-resonance approach
• Combined analysis of the $\gamma n\to K^0{\Sigma }^0$ and $\gamma n\to K^{+}{\Sigma }^{-}$ reactions
• Measurement of $K^{-}p$ radiative capture to $\gamma \Lambda$ and $\gamma {\Sigma }^0$ for $p_{K^{-}}$ between 514 and 750 MeV/$c$