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Lambda(b) -> J/psi K Xi decay and the higher order chiral terms of the meson baryon interaction

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Lambda(b) -> J/psi K Xi decay and the higher order chiral terms of the meson baryon interaction

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dc.contributor.author Feijoo, Albert
dc.contributor.author Magas, Volodymyr
dc.contributor.author Ramos Gómez, Àngels
dc.contributor.author Oset Báguena, Eulogio
dc.date.accessioned 2016-11-16T09:15:43Z
dc.date.available 2016-11-16T09:15:43Z
dc.date.issued 2015
dc.identifier.citation Feijoo, Albert Magas, Volodymyr Ramos Gómez, Àngels Oset Báguena, Eulogio 2015 Lambda(b) -> J/psi K Xi decay and the higher order chiral terms of the meson baryon interaction Physical Review D 92 7 076015
dc.identifier.uri http://hdl.handle.net/10550/55957
dc.description.abstract We study the weak decay of the Lambda(b) into J/psi K Xi. and J/psi eta Lambda states, and relate these processes to the Lambda(b) -> J/psi(K) over barN decay mode. The elementary weak transition at the quark level proceeds via the creation of a J/psi meson and an excited sud system with I = 0, which upon hadronization leads to (K) over barN or eta Lambda pairs. These states undergo final-state interaction in coupled channels and produce a final meson-baryon pair. The K. state only occurs via rescattering, hence making the Lambda(b) -> J/psi K Xi process very sensitive to the details of the meson-baryon interaction in strangeness S = -1 and isospin I = 0. We show that the corresponding invariant mass distribution is dominated by the next-to-leading-order terms of the chiral interaction. The I = 0 selectivity of this decay, and its large sensitivity to the higher-order terms, makes its measurement very useful and complementary to the K- p -> K Xi cross section data. The rates of the Lambda(b) -> J/psi K Xi and Lambda(b) -> J/psi eta Lambda invariant mass distributions are sizable compared to those of the Lambda(b) -> J/psi(K) over barN decay, which is measured experimentally, and thus, we provide arguments for an experimental determination of these decay modes that will help us understand better the chiral dynamics at higher energies.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2015, vol. 92, num. 7, p. 076015
dc.subject Física
dc.title Lambda(b) -> J/psi K Xi decay and the higher order chiral terms of the meson baryon interaction
dc.type journal article es_ES
dc.date.updated 2016-11-16T09:15:43Z
dc.identifier.doi 10.1103/PhysRevD.92.076015
dc.identifier.idgrec 108231
dc.rights.accessRights open access es_ES

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