dc.creatorDias, Jorgivan Morais
dc.creatorNarison, S.
dc.creatorNavarra, Fernando Silveira
dc.creatorNielsen, Marina
dc.creatorRichard, J.-M.
dc.date.accessioned2014-04-22T17:59:21Z
dc.date.accessioned2018-07-04T16:44:11Z
dc.date.available2014-04-22T17:59:21Z
dc.date.available2018-07-04T16:44:11Z
dc.date.created2014-04-22T17:59:21Z
dc.date.issued2011-07-28
dc.identifierPhysics Letters B, Holanda do Norte, v.703, p.274-280, 2011.
dc.identifierhttp://www.producao.usp.br/handle/BDPI/44567
dc.identifierhttp://dx.doi.org/10.1063/1.4795980
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S0370269311009014
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1639652
dc.description.abstractWe have studied, using double ratio of QCD (spectral) sum rules, the ratio between the masses of Tcc and X(3872) assuming that they are respectively described by the D−D∗ and D− ¯D∗ molecular currents. We found (within our approximation) that the masses of these two states are almost degenerate. Since the pion exchange interaction between these mesons is exactly the same, we conclude that if the observed X(3872) meson is a D ¯D∗ + c.c. molecule, then the DD∗ molecule should also exist with approximately the same mass. An extension of the analysis to the b-quark case leads to the same conclusion. We also study the SU(3) breakings for the T s Q Q /TQ Q mass ratios. Motivated by the recent Belle observation of two Zb states, we revise our determination of Xb by combining results from exponential and FESR sum rules.
dc.languageeng
dc.publisherW. Haxton
dc.publisherHolanda do Norte
dc.relationPhysics Letters B
dc.rightsElsevier B.V.
dc.rightsopenAccess
dc.subjectQCD spectral sum rules
dc.subjectNon-perturbative methods
dc.subjectExotic multiquark states
dc.subjectHeavy quarkonia
dc.titleRelation between Tcc,bb and Xc,b from QCD.
dc.typeArtículos de revistas


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