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Chiral unitary approach to eta ' N scattering at low energies
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Chiral unitary approach to eta ' N scattering at low energies
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| dc.contributor.author | Oset Báguena, Eulogio | |
| dc.contributor.author | Ramos Gómez, Àngels | |
| dc.date.accessioned | 2015-08-20T10:48:01Z | |
| dc.date.available | 2015-08-20T10:48:01Z | |
| dc.date.issued | 2011 | |
| dc.identifier.citation | Oset Báguena, Eulogio Ramos Gómez, Àngels 2011 Chiral unitary approach to eta ' N scattering at low energies Physics Letters B 704 4 334 342 | |
| dc.identifier.uri | http://hdl.handle.net/10550/46707 | |
| dc.description.abstract | We study the \eta' 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' 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 --> \eta' N and inelastic \eta' N --> \eta N, \pi N, K\Lambda, K\Sigma\ cross sections at low \eta' energies, and discuss their significance. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Physics Letters B, 2011, vol. 704, num. 4, p. 334-342 | |
| dc.subject | Física | |
| dc.title | Chiral unitary approach to eta ' N scattering at low energies | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2015-08-20T10:48:01Z | |
| dc.identifier.doi | 10.1016/j.physletb.2011.09.025 | |
| dc.identifier.idgrec | 070926 | |
| dc.rights.accessRights | open access | es_ES |
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