Photo- and electroproduction of $K^{+}\Lambda$ with unitarity-restored isobar model

Abstract

Exploiting the isobar model, kaon photo- and electroproduction on the proton in the resonance region comes under scrutiny. An upgrade of our previous model, comprising higher-spin nucleon and hyperon exchanges in the consistent formalism, was accomplished by implementing energy-dependent widths of nucleon resonances, which leads to a different choice of hadron form factor with much softer values of cutoff parameter for the resonant part. For a reliable description of electroproduction, the necessity of including longitudinal couplings of nucleon resonances to virtual photons was revealed. We present a new model whose free parameters were adjusted to photo- and electroproduction data and which provides a reliable overall description of experimental data in all kinematic regions. The majority of nucleon resonances chosen in this analysis coincide with those selected in our previous analysis and also in the Bayesian analysis with the Regge-plus-resonance model as the states contributing to this process with the highest probability.

arXiv comment14 pages, 15 figures

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Cited by in corpus (12)

• High-resolution hypernuclear spectroscopy at Jefferson Lab, Hall A
• $K^{+}\Lambda$ photoproduction at forward angles and low momentum transfer
• Beam-Recoil Transferred Polarization in $K^{+}Y$ Electroproduction in the Nucleon Resonance Region with CLAS12
• Model selection for $K^{+}{\Sigma }^{-}$ photoproduction within isobar model
• Photoproduction of $K^{+}\Lambda$ with a Regge-plus-resonance model
• Spectroscopy of $A=9$ hyperlithium by the $(e,e^{\prime }{K}^{+})$ reaction
• Photon induced K$\Lambda$ production on the proton in the low energy region
• Ridge regression for minimizing the couplings of hyperon resonances in the $K^{+}\Lambda$ photoproduction
• Excited Nucleon Spectrum and Structure Studies with CLAS and CLAS12
• Fermi motion effects in electroproduction of hypernuclei
• Strangeness photoproduction at extremely forward angles at the BGO-OD experiment
• Backward-angle electroproduction of ${\eta }^{\prime }$ mesons off protons at $W=2.13\text{GeV}$ and $Q^2=0.46{\left(\text{GeV}/c\right)}^2$