1996/05/25 by A. Abd El-Hady, Alakabha Datta, Kumar S. Gupta +3
Physics and Astronomy · #High-Energy Particle Collisions Research #Meson #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #hep-ph
paper · pdf · doi:10.1103/physrevd.55.6780
published as Phys.Rev.D55:6780-6787,1997 · 15 pages, 5 figures
arxiv created 1996/05/25 · openalex publication_date 1997/06/01 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We calculate the form factors for the semileptonic decays of the B meson to D and D* mesons in a Bethe-Salpeter model. We show that our model is consistent with the constraints of heavy quark effective theory (HQET) and we extract the matrix elements that represent the 1/mQ corrections to the form factors in HQET. We obtain \ensuremathΛ\ensuremath∼0.55 GeV which is consistent with QCD sum rules but higher than its estimate in nonrelativistic quark model calculations. With available data, we obtain Vcb=(31.9\ifmmode±\else\textpm\fi1.4)\ifmmode×\else\texttimes\fi10^\ensuremath-3.