2006/07/11 by M. Jamil Aslam, Riazuddin
Engineering · Physics and Astronomy · #Particle Accelerators and Free-Electron Lasers #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.75.034004
published as Phys.Rev.D75:034004,2007 · 10 pages, 2 figures
arxiv created 2006/07/11 · openalex publication_date 2007/02/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We calculate the branching ratios for B\ensuremath→(b1,h1)\ensuremathγ at next-to-leading order (NLO) of \ensuremathαs where b1 and h1 are the corresponding orbitally excited axial vector mesons of \ensuremathρ and \ensuremathω respectively. Using the SU(3) symmetry for the form factors, the branching ratio for B\ensuremath→(b1,h1)\ensuremathγ is expressed in terms of the branching ratio of the B\ensuremath→K1\ensuremathγ and it is found to be B(B\ensuremath→b1\ensuremathγ)=0.53\ifmmode×\else\texttimes\fi10^\ensuremath-6 and B(B\ensuremath→h1\ensuremathγ)=0.51\ifmmode×\else\texttimes\fi10^\ensuremath-6. We also calculate direct CP-asymmetry for these decays and find that its typical values lies around 11% and is negative like \ensuremathρ and \ensuremathω in the standard model. The predicted value of CP-asymmetry, in confirmity with the observations made in the literature, is scale dependent which has also been discussed in detail.