Forward-angle K+ Lambda photoproduction in a Regge-plus-resonance approach

Abstract

We present an effective-Lagrangian description for forward-angle K+ Lambda photoproduction from the proton, valid for photon lab energies from threshold up to 16 GeV. The high-energy part of the amplitude is modeled in terms of t-channel Regge-trajectory exchange. The sensitivity of the calculated observables to the Regge-trajectory phase is investigated in detail. The model is extended towards the resonance region by adding a number of s-channel resonances to the t-channel background. The proposed hybrid ``Regge-plus-resonance'' (RPR) approach allows one to exploit the p(gamma,K+)Lambda data in their entirety, resulting in stronger constraints on both the background and resonance couplings. The high-energy data can be used to fix the background contributions, leaving the resonance couplings as the sole free parameters in the resonance region. We compare various implementations of the RPR model, and explore to what extent the description of the data can be improved by introducing the ``new'' resonances D13(1900) and P11(1900). Despite its limited number of free parameters, the proposed RPR approach provides an efficient description of the p(gamma,K+)Lambda dynamics in and beyond the resonance region.

31 pages, 9 figures, accepted for publication in PRC. Section IIIB modified to include the most recent data; discussion of results and conclusions changed accordingly

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Cited by in corpus (65)

• Baryon spectroscopy
• Differential cross section and recoil polarization measurements for the gamma p to K+ Lambda reaction using CLAS at Jefferson Lab
• First Measurement of Beam-Recoil Observables Cx and Cz in Hyperon Photoproduction
• Dynamical coupled-channel approach to hadronic and electromagnetic production of kaon-hyperon on the proton
• Differential cross sections and recoil polarizations for the reaction gamma p -> K+ Sigma0
• Measurement of beam-recoil observables Ox, Oz and target asymmetry for the reaction gamma p -> K Lambda
• Kaon photoproduction in a multipole approach
• Consistent interactions for high-spin fermion fields
• Regge-plus-resonance treatment of the p(gamma,K^+)Sigma^0 and p(gamma,K^0)Sigma^+ reactions at forward kaon angles
• Bayesian inference of the resonance content of p(gamma,K^+)Lambda
• Eta and Etaprime Photoproduction on the Nucleon with the Isobar Model EtaMAID2018
• A Bayesian analysis of kaon photoproduction with the Regge-plus-resonance model
• Photoproduction of $K\Lambda$ on the proton
• Electromagnetic production of kaon near threshold
• Electroproduction of kaons from the proton in a Regge-plus-resonance approach
• Electroweak single-pion production off the nucleon: from threshold to high invariant masses
• Differential cross section of gamma n to K+ Sigma- on bound neutrons with incident photons from 1.1 to 3.6 GeV
• Regge phenomenology of pion photoproduction off the nucleon at forward angles
• Lambda(1520) photoproduciton off the proton target with Regge contributions
• Production of strange and charmed baryons in pion induced reactions
• Photoproduction of $\Lambda (1405)$ with the $N^{\ast }$ and $t$-channel Regge contributions
• A coupled-channel analysis for phi-photoproduction with Lambda(1520)
• Charged K* Photoproduction in a Regge model
• Photoproduction of Z(4430) through mesonic Regge trajectories exchange
• The $\Sigma$(1385) photoproduciton from proton within a Regge-plus-resonance approach
• Preserving Local Gauge Invariance with t-Channel Regge Exchange
• Energy-independent PWA of the reaction $\gamma p\to K^{+}\Lambda$
• K*Sigma photoproduction off the proton target with baryon resonances
• Photoproduction of $\Lambda$ and ${\Sigma }^0$ hyperons off protons with linearly polarized photons at $E_{\gamma }=1.5-3.0$ GeV
• Scaling and Resonances in Elementary K^+ Lambda Photoproduction
• The incompleteness of complete pseudoscalar-meson photoproduction
• Sign ambiguity in the K Sigma channel
• $\eta$ production off the proton in a Regge-plus-chiral quark approach
• Production of hidden-charm strange pentaquarks $P_{cs}$ from the $K^{-}p\to J/\psi \Lambda$ reaction
• Observation of a cusp-like structure in the $\gamma p\to K^{+}{\Sigma }^0$ cross section at forward angles and low momentum transfer
• Photo-production of neutral kaons on 12C in the threshold region
• Regge-plus-resonance predictions for kaon photoproduction from the neutron
• $K^0\Lambda$ photoproduction off the neutron with nucleon resonances
• Model discrimination in pseudoscalar-meson photoproduction
• Differential cross section and photon beam asymmetry for the gamma p -> pi+ n reaction at forward pi+ angles at Egamma=1.5-2.95 GeV
• Chiral constituent quark model study of the process $\gamma p\to \eta p$
• $K^{+}\Lambda$ electroproduction above the resonance region
• Pomeron, nucleon-resonance, and $(0^{+},0^{-},1^{+})$-meson contributions in $\varphi$-meson photoproduction
• Photoproduction of $K^{+}\Lambda$ with a Regge-plus-resonance model
• Charged pion photoproduction with the Delta(1232) baryon beyond the resonance region
• Theory of the electromagnetic production of hyperons
• Photon induced K$\Lambda$ production on the proton in the low energy region
• Photoproduction of $a_2(1320)$ in a Regge model
• Bayesian model selection for electromagnetic kaon production on the nucleon
• Effects of nucleon resonances on $\eta$ photoproduction off the neutron reexamined
• Ridge regression for minimizing the couplings of hyperon resonances in the $K^{+}\Lambda$ photoproduction
• The strangeness program at GlueX
• Measurement of the Photon Beam Asymmetry in $\vec{\gamma }p\to K^{+}{\Sigma }^0$ at $E_{\gamma }=8.5$ GeV
• Kaon photoproduction from the deuteron in a Regge-plus-resonance approach
• Charged lepton induced one kaon production off the nucleon
• Strangeness Electromagnetic Production on Nucleons and Nuclei
• Assessing the theory-data tension in neutrino-induced charged pion production: the effect of final-state nucleon distortion
• Bayesian Model Selection for Electromagnetic Kaon Production on the Nucleon
• Complete sets of observables in pseudoscalar-meson photoproduction
• Measurement of $K^{-}p$ radiative capture to $\gamma \Lambda$ and $\gamma {\Sigma }^0$ for $p_{K^{-}}$ between 514 and 750 MeV/$c$
• The $p(\gamma ,K^{+})\Lambda$ reaction: consistent high-spin interactions and Bayesian inference of its resonance content
• Irreducible tensor approach to spin observables in photo production of mesons with arbitrary spin-parity $s^{\pi }$
• Extraction of $t$-slopes from experimental $\gamma p\to K^{+}\Lambda$ and $\gamma p\to K^{+}{\Sigma }_0$ cross section data
• A Simple Quark Model for γp -> K^+ Λ^0
• Coupled channel study of $K^{+}\Lambda$ photoproduction