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2011-10-19

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/21043

Chiral unitary approach to eta'N scattering at low energies

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http://dx.doi.org/10.1016/j.physletb.2011.09.025

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.

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Cromodinàmica quàntica Partícules (Física nuclear), Mesons (Física nuclear), Reaccions nuclears

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Quantum chromodynamics, Mesons (Nuclear physics), Nuclear reactions

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Articles publicats en revistes (Física Quàntica i Astrofísica)
Publicacions de projectes de recerca finançats per la UE

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OSET BAGUENA, Eulogio and RAMOS GÓMEZ, Àngels. Chiral unitary approach to eta'N scattering at low energies. Physics Letters B. 2011. Vol. 704, num. 4, pags. 334-342. ISSN 0370-2693. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/21043

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