Semileptonic decays B → (π, ϱ)eν in relativistic quark model

1996/03/20 by Dmitri Melikhov, D. Melikhov · 3 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)00507-2

published as Phys.Lett. B380 (1996) 363-370 · latex, 8 pages, 2 figures

arxiv created 1996/03/20 · openalex publication_date 1996/07/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Quark model results for the B→ π,ρ decays are analysed, making use of the dispersion formulation of the model: The form factors at q²>0 are expressed as relativistic invariant double spectral representation over invariant masses of the initial and final mesons through their light--cone wave functions. The dependence of the results on the quark model parameters is studied. For various versions of the quark model the ranges Γ( B⁰→π⁺eν)=(7±2)×10¹²|V_ub|² s^-1, Γ( B⁰→ρ⁺eν)/Γ( B⁰→π⁺eν)=1.45±0.1, and Γ_L/Γ_T=0.7±0.08 are found. The effects of the constituent quark transition form factor are briefly discussed.

Citations

• Form factor relations for heavy-to-light transitions

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