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Phenomenological study of the Bc→BP, BV decays with perturbative QCD approach

Junfeng Sun, Yueling Yang*, Qin Chang†, and Gongru Lu

  • Institute of Particle and Nuclear Physics, Henan Normal University, Xinxiang 453007, China

  • *yangyueling@htu.cn
  • †changqin@htu.cn
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Phys. Rev. D 89, 114019 – Published 18 June, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.114019

Abstract

Inspired by the recent LHCb measurements and forthcoming great potential on Bc meson, we study the exclusive Bc→BqP, BqV decays with the perturbative QCD approach, where q=u, d, s and P and V denote the lightest pseudoscalar and vector SU(3) nonet meson, respectively. By retaining the quark transverse momentum, employing the Sudakov factors, and choosing the typical scale as the maximum virtualities of the internal particles, we calculate the Bc→B transition from factors, and our results show that about 90% of the contribution to form factors comes from the αs/π<0.3 region. The contributions of penguin and annihilation to branching ratios are very small due to the serious suppression by the CKM factors. There are some hierarchy relations among the Bc→BP, BV decays. The branching ratios for Bc→Bd,sπ, Bd,sρ, BsK are large and could be measured by the running LHCb.

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Phys. Rev. D 89, 114019– Published 18 June, 2014
  • Received 6 April 2014

© 2014 American Physical Society

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