Regge approach to charged-pion photoproduction at invariant energies above 2 GeV

Abstract

A Regge model with absorptive corrections is employed in a global analysis of the world data on positive and negative pion photoproduction for photon energies from 3 to 8 GeV. In this region resonance contributions are expected to be negligible so that the available experimental information on differential cross sections and single polarization observables at -t \leq 2 GeV^2 allows us to determine the non-resonant part of the reaction amplitude reliably. The model amplitude is then used to predict observables for photon energies below 3 GeV. Differences between our predictions and data in this energy region are systematically examined as possible signals for the presence of excited baryons. We find that the data available for the polarized photon asymmetry show promising resonance signatures at invariant energies around 2 GeV. With regard to differential cross sections the analysis of negative pion photoproduction data, obtained recently at JLab, indicates likewise the presence of resonance structures around 2 GeV

arXiv commentmisprint in Table 3 corrected; reference added

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• Coupled-channel dynamics in the reactions piN --> piN, etaN, KLambda, KSigma
• The reaction pi+ p --> K+ Sigma+ in a unitary coupled-channels model
• Photon induced Lambda(1520) production and the role of the K^* exchange
• Bayesian inference of the resonance content of p(gamma,K^+)Lambda
• Pion- and photo-induced transition amplitudes to $\Lambda K$, $\Sigma K$, and $N\eta$
• A Bayesian analysis of kaon photoproduction with the Regge-plus-resonance model
• P-wave excited baryons from pion- and photo-induced hyperon production
• A measurement of the differential cross section for the reaction $\gamma n\to {\pi }^{-}p$ from deuterium
• Regge phenomenology of pion photoproduction off the nucleon at forward angles
• Photoproduction of Z(4430) through mesonic Regge trajectories exchange
• $\eta$ production off the proton in a Regge-plus-chiral quark approach
• Neutral pion photoproduction at high energies
• Proton-proton scattering above 3 GeV/c
• Backward pion-nucleon scattering
• Backward pion photoproduction
• Regge description of two pseudoscalar meson production in antiproton-proton annihilation
• Analysis of recent eta photoproduction data
• 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
• Structure of Pion Photoproduction Amplitudes