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Hidden charm N and Delta resonances with heavy-quark symmetry

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Hidden charm N and Delta resonances with heavy-quark symmetry

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dc.contributor.author	García Recio, Carmen
dc.contributor.author	Nieves Pamplona, Juan Miguel
dc.contributor.author	Romanets, Olena
dc.contributor.author	Salcedo, Lorenzo Luis
dc.contributor.author	Tolós Rigueiro, Laura
dc.date.accessioned	2014-10-14T12:31:49Z
dc.date.available	2014-10-14T12:31:49Z
dc.date.issued	2013
dc.identifier.citation	García Recio, Carmen Nieves Pamplona, Juan Miguel Romanets, Olena Salcedo, Lorenzo Luis Tolos, L. 2013 Hidden charm N and Delta resonances with heavy-quark symmetry Physical Review D 87 7 074034
dc.identifier.uri	http://hdl.handle.net/10550/39184
dc.description.abstract	A model is developed to describe odd-parity baryon resonances generated dynamically through a unitary baryon-meson coupled-channels approach. The scheme applies to channels with light- and/or heavy-quark content. Distinct features of the model are that i) the interaction is an S-wave contact one, ii) it reduces to the SU(3) Weinberg-Tomozawa Hamiltonian when light pseudoscalar mesons are involved, thus respecting chiral symmetry, iii) spin-flavor is preserved in the light-quark sector, and iv) heavy-quark spin symmetry is fulfilled in the heavy-quark sector. In particular, baryon-meson states with different content in c or in (c) over bar do not mix. The model is a minimal one and it contains no free parameters. In this work, we focus on baryon resonances with hidden charm (at least one (c) over bar and one c quark). We analyze several possible sectors and, for the sector with zero net charm, we write down the most general Lagrangian consistent with SU(3) and heavy-quark spin symmetry. We explicitly study the N and Delta states, which are produced from the S-wave interaction of pseudoscalar and vector mesons with 1/2(+) and 3/2(+) baryons within the charmless and strangeless hidden-charm sector. We predict seven odd-parity N-like and five Delta-like states with masses around 4 GeV, most of them as bound states. These states form heavy-quark spin multiplets, which are almost degenerate in mass. The predicted new resonances definitely cannot be accommodated by quark models with three constituent quarks and they might be looked for in the forthcoming PANDA experiment at the future FAIR facility.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 2013, vol. 87, num. 7, p. 074034
dc.subject	Física
dc.title	Hidden charm N and Delta resonances with heavy-quark symmetry
dc.type	journal article	es_ES
dc.date.updated	2014-10-14T12:31:49Z
dc.identifier.doi	10.1103/PhysRevD.87.074034
dc.identifier.idgrec	091391
dc.rights.accessRights	open access	es_ES