2004/05/31 by Sonny Mantry
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.70.114006
published as Phys.Rev. D70 (2004) 114006 · 22 pages, 5 figures, typos corrected, references added, discussion on subleading effects clarified, replaced version accepted for publication in Phys.Rev.D
arxiv created 2004/12/07 · openalex publication_date 2004/12/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We show in a model independent way the equality of the branching fractions and strong phases for B\ensuremath→D1M and B\ensuremath→D2*M at leading order in \ensuremathΛQCD/Q and \ensuremathαs(Q) where Q=mb,mc,EM and M is a light meson. These results apply in the color allowed and color suppressed channels and follow from a factorization theorem in soft-collinear effective theory combined with heavy quark symmetry. The expected heavy quark symmetry suppression of leading order contributions in the color allowed sector based on analysis of semileptonic decays is shown to disappear at maximum recoil. Subleading corrections are suppressed by at least one power of \ensuremathΛQCD/Q and this is explicitly verified for subleading semileptonic form factors at maximum recoil.