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Geometrical volume effects in the computation of the slope of the isgur-wise function

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Geometrical volume effects in the computation of the slope of the isgur-wise function

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dc.contributor.author	Lellouch, Laurent
dc.contributor.author	Nieves Pamplona, Juan Miguel
dc.contributor.author	Sachrajda, Christopher T.
dc.contributor.author	Stella, N.
dc.contributor.author	Wittig, Hartmut
dc.contributor.author	Martinelli, Guido
dc.contributor.author	Richards, D.G.
dc.date.accessioned	2014-10-16T11:55:28Z
dc.date.available	2014-10-16T11:55:28Z
dc.date.issued	1995
dc.identifier.citation	Lellouch, Laurent Nieves Pamplona, Juan Miguel Sachrajda, Christopher T. Stella, N. Wittig, Hartmut Martinelli, Guido Richards, D.G. 1995 Geometrical volume effects in the computation of the slope of the isgur-wise function Nuclear Physics B 444 1-2 401 424
dc.identifier.uri	http://hdl.handle.net/10550/39215
dc.description.abstract	We use a method recently suggested for evaluating the slope of the Isgur-Wise function, at the zero-recoil point, on the lattice. The computations are performed in the quenched approximation to lattice QCD, on a 24(3) x 48 lattice at beta = 6.2, using an O(a)-improved action for the fermions. We have found unexpectedly large finite-volume effects in such a calculation. These volume corrections turned out to be purely geometrical and independent of the dynamics of the system. After the study of these effects on a smaller volume and for different quark masses, we give approximate expressions that account for them. Using these approximations we find xi'(1) = -1.7 (+2)(-2) and xi'(1) = -1.4 (+2)(-1) for the slope of the Isgur-Wise function, for two mesons composed of a heavy quark slightly heavier and lighter, respectively, than the charm quark, and in both cases, a light antiquark whose mass is about that of the strange quark.
dc.language.iso	eng
dc.relation.ispartof	Nuclear Physics B, 1995, vol. 444, num. 1-2, p. 401-424
dc.subject	Física
dc.title	Geometrical volume effects in the computation of the slope of the isgur-wise function
dc.type	journal article	es_ES
dc.date.updated	2014-10-16T11:55:28Z
dc.identifier.doi	10.1016/0550-3213(95)00180-Z
dc.identifier.idgrec	068620
dc.rights.accessRights	open access	es_ES