We calculate, in the continuum limit of quenched lattice QCD, the form factor that enters in the decay rate of the semileptonic decay B -> Dlv. Making use of the step scaling method (SSM), previously introduced to handle two scale problems in lattice QCD, and of flavour twisted boundary conditions we extract G(B -> D)(w) at finite momentum transfer and at the physical values of the heavy quark masses. Our results can be used in order to extract the CKM matrix element V-cb by the experimental decay rate without model dependent extrapolations. (c) 2007 Elsevier B.V. All rights reserved.
DE DIVITIIS, G.m., Molinaro, E., Petronzio, R., Tantalo, N. (2007). Quenched lattice calculation of the B -> Dlv decay rate. PHYSICS LETTERS. SECTION B, 655(1-2), 45-49 [10.1016/j.physletb.2007.08.085].
Quenched lattice calculation of the B -> Dlv decay rate
DE DIVITIIS, GIULIA MARIA;PETRONZIO, ROBERTO;TANTALO, NAZZARIO
2007-01-01
Abstract
We calculate, in the continuum limit of quenched lattice QCD, the form factor that enters in the decay rate of the semileptonic decay B -> Dlv. Making use of the step scaling method (SSM), previously introduced to handle two scale problems in lattice QCD, and of flavour twisted boundary conditions we extract G(B -> D)(w) at finite momentum transfer and at the physical values of the heavy quark masses. Our results can be used in order to extract the CKM matrix element V-cb by the experimental decay rate without model dependent extrapolations. (c) 2007 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
