dc.creatorBRACCO, M. E.
dc.creatorNIELSEN, Marina
dc.date.accessioned2012-04-18T23:55:33Z
dc.date.accessioned2018-07-04T14:38:30Z
dc.date.available2012-04-18T23:55:33Z
dc.date.available2018-07-04T14:38:30Z
dc.date.created2012-04-18T23:55:33Z
dc.date.issued2010
dc.identifierPHYSICAL REVIEW D, v.82, n.3, 2010
dc.identifier1550-7998
dc.identifierhttp://producao.usp.br/handle/BDPI/16004
dc.identifier10.1103/PhysRevD.82.034012
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.82.034012
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1612826
dc.description.abstractWe evaluate the mass of the B(s0) scalar meson and the coupling constant in the B(s0)BK vertex in the framework of QCD sum rules. We consider the B(s0) as a tetraquark state to evaluate its mass. We get m(Bs0) = (5.85 +/- 0.13) GeV, which is in agreement, considering the uncertainties, with predictions supposing it as a b (s) over bar state or a B (K) over bar bound state with J(P) = 0(+). To evaluate the g(Bs0BK) coupling, we use the three-point correlation functions of the vertex, considering B(s0) as a normal b (s) over bar state. The obtained coupling constant is: g(Bs0BK) = (16.3 +/- 3.2) GeV. This number is in agreement with light-cone QCD sum rules calculation. We have also compared the decay width of the B(s0) -> BK process considering the B(s0) to be a b (s) over bar state and a BK molecular state. The width obtained for the BK molecular state is twice as big as the width obtained for the b (s) over bar state. Therefore, we conclude that with the knowledge of the mass and the decay width of the B(s0) meson, one can discriminate between the different theoretical proposals for its structure.
dc.languageeng
dc.publisherAMER PHYSICAL SOC
dc.relationPhysical Review D
dc.rightsCopyright AMER PHYSICAL SOC
dc.rightsrestrictedAccess
dc.titleBs0 meson and the Bs0BK coupling from QCD sum rules
dc.typeArtículos de revistas


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