@Article{Oset+Ramos2011,
author="Oset, E.
and Ramos, A.",
title="Chiral unitary approach to eta {\textquoteright} N scattering at low energies",
journal="Physics Letters B",
year="2011",
publisher="Elsevier Science Bv",
volume="704",
number="4",
pages="334--342",
abstract="We study the eta{\textquoteright}N interaction within a chiral unitary approach which includes pi N, eta N and related pseudoscalar meson-baryon coupled channels. Since the SU(3) singlet does not contribute to the standard interaction and the eta{\textquoteright} is mostly a singlet, the resulting scattering amplitude is very small and inconsistent with the experimental scattering length. The additional consideration of vector meson-baryon states into the coupled channel scheme, via normal and anomalous couplings of pseudoscalar to vector mesons, enhances substantially the eta{\textquoteright}N amplitude. We also exploit the freedom of adding to the Lagrangian a new term, allowed by the symmetries of QCD, which couples baryons to the singlet meson of SU(3). Adjusting the unknown strength to the eta{\textquoteright}N scattering length, we obtain predictions for the elastic eta{\textquoteright}N -> eta{\textquoteright}N and inelastic eta{\textquoteright}N -> eta N, pi N, K Lambda, K Sigma cross sections at low eta{\textquoteright} energies, and discuss their significance.",
optnote="WOS:000296175500015",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=783), last updated on Fri, 11 Nov 2011 15:30:29 +0000",
issn="0370-2693",
doi="10.1016/j.physletb.2011.09.025",
opturl="http://arxiv.org/abs/1010.5603",
opturl="https://doi.org/10.1016/j.physletb.2011.09.025",
archivePrefix="arXiv",
eprint="1010.5603",
language="English"
}