Eta-photoproduction in a gauge-invariant chiral unitary framework
Nuclear Theory
2015-05-30 v2 High Energy Physics - Experiment
High Energy Physics - Phenomenology
Nuclear Experiment
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.
Keywords
Cite
@article{arxiv.1108.4825,
title = {Eta-photoproduction in a gauge-invariant chiral unitary framework},
author = {Dino Ruic and Maxim Mai and Ulf-G. Meissner},
journal= {arXiv preprint arXiv:1108.4825},
year = {2015}
}
Comments
Updated version to be published in Physics Letters B