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Title: Chiral unitary approach to eta'N scattering at low energies
Author: Oset Baguena, Eulogio
Ramos Gómez, Àngels
Keywords: Cromodinàmica quàntica Partícules (Física nuclear)
Mesons (Física nuclear)
Reaccions nuclears
Quantum chromodynamics
Mesons (Nuclear physics)
Nuclear reactions
Issue Date: 19-Oct-2011
Publisher: Elsevier B. V.
Abstract: We study the eta'N interaction within a chiral unitary approach which includes piN , etaN and related pseudoscalar meson-baryon coupled channels. Since the SU(3) singlet does not contribute to the standard interaction and the eta' is mostly a singlet, the resulting scattering amplitude is very small and inconsistent with experimental estimations of the eta' N 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' 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' N scattering length, we obtain predictions for the elastic eta'N -> etaN and inelastic eta' N -> etaN , piN , KLambda, KEpsilon cross sections at low eta' energies, and discuss their significance.
Note: Versió postprint del document publicat a:
It is part of: Physics Letters B, 2011, Vol. 704, núm. 4, p. 334-342
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ISSN: 0370-2693
Appears in Collections:Publicacions de projectes de recerca finançats per la UE
Articles publicats en revistes (Física Quàntica i Astrofísica)

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