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Form Factors for B -> pi l nu-bar_l and B -> K* gamma Decays on the Lattice

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Form Factors for B -> pi l nu-bar_l and B -> K* gamma Decays on the Lattice

dc.contributor.author	Burford, D.R.
dc.contributor.author	Duong, H.D.
dc.contributor.author	Flynn, Jonathan M.
dc.contributor.author	Gough, B.J.
dc.contributor.author	Hazel, Nick
dc.contributor.author	Nieves Pamplona, Juan Miguel
dc.contributor.author	Shanahan, Hugh P.
dc.date.accessioned	2014-10-16T11:51:01Z
dc.date.available	2014-10-16T11:51:01Z
dc.date.issued	1995
dc.identifier.uri	http://hdl.handle.net/10550/39214
dc.description.abstract	We present a unified method for analysing form factors in B --> pi l ($) over bar nu(l) and B --> Kgamma decays. The analysis provides consistency checks on the q(2) and 1/M extrapolations necessary to obtain the physical decay rates. For the first time the q(2) dependence of the form factors is obtained at the B scale. In the B --> pi l ($) over bar nu(l) case, we show that pole fits to f(+) may not be consistent with the q(2) behaviour of f(0), leading to a possible factor of two uncertainty in the decay rate and hence in the value of /V-ub/(2) deduced from it. For B --> Kgamma, from the combined analysis of form factors T-1 and T-2, we find the hadronisation ratio R(K)* of the exclusive B --> K*gamma to the inclusive b --> s gamma rates is of order 35% or 15% for constant and pole-type behaviour of T-2, respectively.
dc.language.iso	eng
dc.relation.ispartof	Nuclear Physics B, 1995, vol. 447, num. 2-3, p. 425-437
dc.source	Burford, D.R. Duong, H.D. Flynn, Jonathan M. Gough, B.J. Hazel, Nick Nieves Pamplona, Juan Miguel Shanahan, Hugh P. 1995 Form Factors for B -> pi l nu-bar_l and B -> K* gamma Decays on the Lattice Nuclear Physics B 447 2-3 425 437
dc.subject	Física
dc.title	Form Factors for B -> pi l nu-bar_l and B -> K* gamma Decays on the Lattice
dc.type	journal article	es_ES
dc.date.updated	2014-10-16T11:51:01Z
dc.identifier.doi	http://dx.doi.org/10.1016/0550-3213(95)00223-F
dc.identifier.idgrec	068619
dc.rights.accessRights	open access	es_ES