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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: http://dx.doi.org/10.1016/j.physletb.2011.09.025 |
It is part of: | Physics Letters B, 2011, Vol. 704, núm. 4, p. 334-342 |
URI: | http://hdl.handle.net/2445/21043 |
Related resource: | http://dx.doi.org/10.1016/j.physletb.2011.09.025 |
ISSN: | 0370-2693 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Publicacions de projectes de recerca finançats per la UE |
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