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Eta-photoproduction in a gauge-invariant chiral unitary framework

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arxiv 1108.4825 v2 pith:I647RJDI submitted 2011-08-24 nucl-th hep-exhep-phnucl-ex

classification nucl-thhep-exhep-phnucl-ex
keywords chiralframeworkgauge-invariantkernelunitaryanalyseballbethe-salpeter
verification ladder T0 review T1 audit T2 compute T3 formal
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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.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Universal parameters of the $\Lambda(1380)$, the $\Lambda(1405)$ and their isospin partners from a combined analysis of Lattice QCD and experimental results

    hep-ph 2025-07 conditional novelty 6.0 of 10

    A combined global fit of lattice QCD spectra and experimental Kbar N data within chiral unitary approaches gives pole positions for the Lambda(1380) and Lambda(1405) at physical and lattice quark masses, with systemat...

  2. Theory of resonances

    hep-ph 2025-02 accept

    A pedagogical review of S-matrix theory and amplitude parametrizations for defining and extracting resonance parameters in hadron spectroscopy.

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