Kaon photoproduction from the deuteron in a Regge-plus-resonance approach

Abstract

We present a Regge-inspired effective-Lagrangian framework for kaon photoproduction from the deuteron. Quasi-free kaon production is investigated using the Regge-plus-resonance (RPR) elementary operator within the relativistic planewave impulse approximation. The RPR model was developed to describe photoinduced and electroinduced charged-kaon production off protons. We show how this elementary operator can be transformed in order to account for the production of neutral kaons from both protons and neutrons. The model results for kaon photoproduction from the deuteron compare favourably to the 2 H(γ, K)Y N data published to date.

Neutron helicity amplitudes

“…The helicity amplitudes for the photoproduction of N * resonances excited from neutrons have been determined by several groups [6][7][8][9][10][11][12]. Mostly, the real-valued helicity amplitudes were reported from fits using Breit-Wigner representations of resonances.…”

Amplitude extraction in pseudoscalar-meson photoproduction: towards a situation of complete information

“…The resonance content of the RPR-2011 model was determined in a Bayesian analysis of the available data. The RPR approach provides a low-parameter framework with predictive power for K + and K 0 photoproduction on the proton and the deuteron [21]. Interestingly, in Fig.1 it is seen that the energy and angular dependence of the moduli of the amplitudes r i = |a i | display some interesting features.…”

“…The resonance content of the RPR-2011 model was determined in a Bayesian analysis of the available data. The RPR approach provides a low-parameter framework with predictive power for K + and K 0 photoproduction on the proton and the deuteron [21]. Interestingly, in Fig.…”

Strangeness Photoproduction on Quasifree Neutrons

“…In addition, experimental data very close above the reaction threshold provide a precision test of Chiral Perturbation Theory including the strangeness degree of freedom [9,10]. Finally, measurements of strangeness photoproduction on bound nucleons may offer the possibility to study the KN and Y N potentials via final state interaction (FSI) [11]. A good understanding of the latter is crucial for the study of hypernuclei for example.…”