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Low-lying even parity meson resonances and spin-flavor symmetry revisited

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Low-lying even parity meson resonances and spin-flavor symmetry revisited

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dc.contributor.author	García Recio, Carmen
dc.contributor.author	Geng, Li Sheng
dc.contributor.author	Nieves Pamplona, Juan Miguel
dc.contributor.author	Salcedo, Lorenzo Luis
dc.contributor.author	Wang, En
dc.contributor.author	Xie, J. J.
dc.date.accessioned	2014-10-14T12:37:26Z
dc.date.available	2014-10-14T12:37:26Z
dc.date.issued	2013
dc.identifier.citation	García Recio, Carmen Geng, Li Sheng Nieves Pamplona, Juan Miguel Salcedo, Lorenzo Luis Wang, En Xie, J. J. 2013 Low-lying even parity meson resonances and spin-flavor symmetry revisited Physical Review D 87 9 096006
dc.identifier.uri	http://hdl.handle.net/10550/39185
dc.description.abstract	We review and extend the model derived in Garcia-Recio et al. [Phys. Rev. D 83, 016007 (2011)] to address the dynamics of the low-lying even-parity meson resonances. This model is based on a coupled-channels spin-flavor extension of the chiralWeinberg-Tomozawa Lagrangian. This interaction is then used to study the S-wave meson-meson scattering involving members not only of the pi octet, but also of the rho nonet. In this work, we study in detail the structure of the SU(6)-symmetry-breaking contact terms that respect (or softly break) chiral symmetry. We derive the most general local (without involving derivatives) terms consistent with the chiral-symmetry-breaking pattern of QCD. After introducing sensible simplifications to reduce the large number of possible operators, we carry out a phenomenological discussion of the effects of these terms. We show how the inclusion of these pieces leads to an improvement of the description of the J(P) = 2(+) sector, without spoiling the main features of the predictions obtained in the original model in the JP = 0(+) and J(P) = 1(+) sectors. In particular, we find a significantly better description of the I-G(J(PC)) =0(+)(2(++)), 1(-)(2(++)) and the I(JP)=1/2(2(+)) sectors, which correspond to the f(2)(1270), a(2)(1320), and K-2(*)(1430) quantum numbers, respectively.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 2013, vol. 87, num. 9, p. 096006
dc.subject	Física
dc.title	Low-lying even parity meson resonances and spin-flavor symmetry revisited
dc.type	journal article	es_ES
dc.date.updated	2014-10-14T12:37:26Z
dc.identifier.doi	10.1103/PhysRevD.87.096006
dc.identifier.idgrec	091390
dc.rights.accessRights	open access	es_ES