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B-0-(B)over-bar(0) mixing and decay constants with the non-perturbatively improved action

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B-0-(B)over-bar(0) mixing and decay constants with the non-perturbatively improved action

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dc.contributor.author	Giménez Gómez, Vicente
dc.contributor.author	Becirevic, D.
dc.contributor.author	Meloni, Davide
dc.contributor.author	Retico, A.
dc.contributor.author	Giusti, L.
dc.contributor.author	Lubicz, V.
dc.contributor.author	Martinelli, Guido
dc.date.accessioned	2014-09-26T10:40:21Z
dc.date.available	2014-09-26T10:40:21Z
dc.date.issued	2001
dc.identifier.citation	Giménez Gómez, Vicente 2001 B-0-(B)over-bar(0) mixing and decay constants with the non-perturbatively improved action Nuclear Physics B 618 1-2 241 258
dc.identifier.uri	http://hdl.handle.net/10550/38999
dc.description.abstract	Several quantities relevant to phenomenological studies of B-0-(B) over bar (0) mixing are computed on the lattice. Our main results are f(Bd) root(B) over cap (Bd) = 206(28) (14)(-00)(+31) MeV, xi = f(Bd) root(B) over capB(x)/f(Bd) root(B) over cap (Bd) = 1.16(7). We also obtain the related quantities f(Bs) root(B) over cap (Bs) - 237(18) (10)(-00)(+34) MeV, f(Bd) = 174(22)(-0-0-00)(+7+5+26) MeV, f(Bs) = 204(15)(-0-0-00)(+7+4+31) MeV, f(Bs)/f(Bd) = 1.17(4)(-1)(+0), f(Bd)/f(Ds) = 0.74(5). After combining our results with the experimental world average Deltam(d)((exp)), we predict Deltam(s) = 15.8(2.1)(3.3) ps(-1). We have also computed the relevant parameters for D-0-(D) over bar (0) mixing which may be useful in some extensions of the Standard Model. All the quantities were obtained from a quenched simulation with a non-perturbatively improved Clover action at beta = 6.2, corresponding to a lattice spacing a(-1) = 2.7(1) GeV, on a sample of 200 gauge-field configurations. A discussion of the main systematic errors is also presented. The quenching errors are not included in the systematic error estimates.
dc.language.iso	eng
dc.relation.ispartof	Nuclear Physics B, 2001, vol. 618, num. 1-2, p. 241-258
dc.subject	Partícules (Física nuclear)
dc.title	B-0-(B)over-bar(0) mixing and decay constants with the non-perturbatively improved action
dc.type	journal article	es_ES
dc.date.updated	2014-09-26T10:40:21Z
dc.identifier.doi	10.1016/S0550-3213(01)00482-5
dc.identifier.idgrec	041502
dc.rights.accessRights	open access	es_ES