2003/05/31 by Yong-Yeon Keum, T. Kurimoto, Hsiang-nan Li +4 · 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:10.1103/physrevd.69.094018
published as Phys.Rev. D69 (2004) 094018 · 25 pages with Latex, axodraw.sty, 6 figures and 5 tables, Version published in PRD, Added new section 5 and references
openalex publication_date 2004/05/21 · arxiv created 2005/02/11 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
While the naive factorization assumption works well for many two-body nonleptonic B meson decay modes, the recent measurement of B\ensuremath→D(*)0M0 with M=\ensuremathπ, \ensuremathρ, and \ensuremathω shows a large deviation from this assumption. We analyze the \stackrel\ensuremath→BD(*)M decays in the perturbative QCD approach based on the kT factorization theorem, in which both factorizable and nonfactorizable contributions can be calculated in the same framework. Our predictions for the Bauer-Stech-Wirbel parameters, |a2/a1|=0.43\ifmmode±\else\textpm\fi0.04 and Arg(a2/a1)\ensuremath∼\ensuremath-42\ifmmode^∘\else\textdegree\fi and |a2/a1|=0.47\ifmmode±\else\textpm\fi0.05 and Arg(a2/a1)\ensuremath∼\ensuremath-41\ifmmode^∘\else\textdegree\fi, are consistent with the observed \stackrel\ensuremath→BD\ensuremathπ and \stackrel\ensuremath→BD*\ensuremathπ branching ratios, respectively. It is found that the large magnitude |a2| and the large relative phase between a2 and a1 come from color-suppressed nonfactorizable amplitudes. Our predictions for the B0\ensuremath→D*0\ensuremathρ0,D*0\ensuremathω branching ratios can be confronted with future experimental data.