1996/05/19 by I. L. Grach, I.L. Grach, I. M. Narodetskii +3 · 4 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/0370-2693(96)00886-6
published as Phys.Lett. B385 (1996) 317-323 · ps file available via anonymous ftp at ftp://hpteo2.iss.infn.it/
arxiv created 1996/05/19 · openalex publication_date 1996/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The transition form factors describing the semileptonic decays of heavy pseudoscalar mesons are investigated within a relativistic constituent quark model formulated on the light-front. For the first time, the form factors are calculated in the whole accessible kinematical region, adopting meson wave functions derived from various effective q q interactions able to describe the meson mass spectra. It is shown that the decay rates of the B → D ℓ νℓ, D → K ℓ νℓ and D → πℓ νℓ weak decays are mainly governed by the effects of the confinement scale, whereas the B → πℓ νℓ decay rate is sensitive to the high-momentum components generated in the meson wave functions by the effective one-gluon-exchange interaction. Our results are consistent with available experimental data and predictions of lattice QCD calculations and QCD sum rules.