2005/07/31 by Wenjuan Zou, W. Zou, Zhen-Jun Xiao +1
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.72.094026
published as Phys.Rev. D72 (2005) 094026 · 34 pages, 8 PS figures, this is the correct version 3
arxiv created 2005/10/24 · openalex publication_date 2005/11/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
By employing the QCD factorization approach, we calculate the new physics contributions to the branching radios of the two-body charmless B\ensuremath→PV and B\ensuremath→VV decays in the framework of the minimal supergravity (mSUGRA) model. We choose three typical sets of the mSUGRA input parameters in which the Wilson coefficient C_7\ensuremathγ(mb) can be either standard model (SM)-like (the case A and C) or has a flipped sign (the case B). We found numerically that (a) the SUSY contributions are always very small for both case A and C; (b) for those tree-dominated decays, the SUSY contributions in case B are also very small; (c) for those QCD penguin-dominated decay modes, the SUSY contributions in case B can be significant, and can provide an enhancement about 30%\ensuremath∼260% to the branching ratios of B\ensuremath→K*(\ensuremathπ,\ensuremathφ,\ensuremathρ) and K\ensuremathφ decays, but a reduction about 30%\ensuremath∼80% to B\ensuremath→K(\ensuremathρ,\ensuremathω) decays; and (d) the large SUSY contributions in the case B may be masked by the large theoretical errors dominated by the uncertainty from our ignorance of calculating the annihilation contributions in the QCD factorization approach.