Eta-photoproduction in a gauge-invariant chiral unitary framework

Abstract

We analyse photoproduction of eta mesons off the proton in a gauge-invariant chiral unitary framework. The interaction kernel for meson-baryon scattering is derived from the leading order chiral effective Lagrangian and iterated in a Bethe-Salpeter equation. The recent precise threshold data from the Crystal Ball at MAMI can be described rather well and the complex pole corresponding to the S11(1535) is extracted. An extension of the kernel is also discussed.

Updated version to be published in Physics Letters B

References in corpus (4)

• Chiral dynamics of the S11(1535) and S11(1650) resonances revisited
• Study of the gp-->etap reaction with the Crystal Ball detector at the Mainz Microtron(MAMI-C)
• A gauge invariant chiral unitary framework for kaon photo- and electroproduction on the proton
• On the cross section ratio sigma_n/sigma_p in eta photoproduction

Cited by in corpus (19)

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• Jülich-Bonn-Washington Model for Pion Electroproduction Multipoles
• Finite volume effects and quark mass dependence of the N(1535) and N(1650)
• Towards the Minimal Spectrum of Excited Baryons
• Coupled-channel analysis of pion- and eta-electroproduction with the Jülich-Bonn-Washington model
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• Pion photoproduction of nucleon excited states with Hamiltonian effective field theory
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• Global Data-Driven Determination of Baryon Transition Form Factors
• Photoproduction of $\eta$ mesons off the proton for $1.2<E_{\gamma }<4.7$ GeV using CLAS at Jefferson Laboratory
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