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dc.contributor.authorHernández, E.-
dc.contributor.authorVijande, Javier-
dc.contributor.authorValcarce, A.-
dc.contributor.authorRichard, J.M.-
dc.date.accessioned2020-07-10T08:10:10Z-
dc.date.available2020-07-10T08:10:10Z-
dc.date.issued2020-01-
dc.identifierdoi: 10.1016/j.physletb.2019.135073-
dc.identifierissn: 0370-2693-
dc.identifier.citationPHYSICS LETTERS B 800: 135073 (2020)-
dc.identifier.urihttp://hdl.handle.net/10261/216391-
dc.description.abstractWe present the first full-fledged study of the flavor-exotic isoscalar T ≡bbu¯d¯ tetraquark with spin and parity J=1. We report accurate solutions of the four-body problem in a quark model, characterizing the structure of the state as a function of the ratio M/m of the heavy to light quark masses. For such a standard constituent model, T lies approximately 150 MeV below the strong decay threshold BB¯ and 105 MeV below the electromagnetic decay threshold BB¯γ. We evaluate the lifetime of T , identifying the promising decay modes where the tetraquark might be looked for in future experiments. Its total decay width is Γ≈87×10 GeV and therefore its lifetime τ≈ 7.6 ps. The promising final states are B D ℓν¯ and B¯D ℓν¯ among the semileptonic decays, and B D D , B¯D D , and B D ρ among the nonleptonic ones. The semileptonic decay to the isoscalar J=0 tetraquark T is also relevant but it is not found to be dominant. There is a broad consensus about the existence of this tetraquark, and its detection will validate our understanding of the low-energy realizations of Quantum Chromodynamics (QCD) in the multiquark sector.-
dc.languageeng-
dc.publisherElsevier BV-
dc.relationMINECO/ICTI2013-2016/FPA2016-77177-C2-1-P-
dc.relation.isversionofPublisher's version-
dc.rightsopenAccess-
dc.titleSpectroscopy, lifetime and decay modes of the T-bb(-) tetraquark-
dc.typeartículo-
dc.identifier.doihttp://dx.doi.org/10.1016/j.physletb.2019.135073-
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.physletb.2019.135073-
dc.date.updated2020-07-10T08:10:10Z-
dc.rights.licensehttps://creativecommons.org/licenses/by/4.0/-
dc.contributor.funderMinisterio de Economía y Competitividad (España)-
dc.relation.csic-
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003329es_ES
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