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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

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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.citation	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.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.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	10.1016/0550-3213(95)00223-F
dc.identifier.idgrec	068619
dc.rights.accessRights	open access	es_ES