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Study of $Υ (n S) \to B_{c} ρ$ $Υ (n S) \to B_{c} ρ$ and $B_{c} K^{}$ $B_{c} K^{}$ decays within the QCD factorization

Qin Chang

Institute of Particle and Nuclear Physics, Henan Normal University, Henan 453007, P. R. China

E-mail Address: changqin@htu.edu.cn

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Yunyun Zhang

Institute of Particle and Nuclear Physics, Henan Normal University, Henan 453007, P. R. China

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, and

Lin Han

Institute of Particle and Nuclear Physics, Henan Normal University, Henan 453007, P. R. China

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https://doi.org/10.1142/S0217732316502096Cited by:0 (Source: Crossref)

Abstract

Motivated by the heavy-flavor experiments at running Large Hadron Collider (LHC) and upgrading SuperKEKB, which provide abundant $Υ$ $Υ$ data samples, the tree-dominated $Υ (n S) \to B_{c} ρ$ $Υ (n S) \to B_{c} ρ$ and $B_{c} K^{*}$ $B_{c} K^{*}$ (n =1, 2, 3) weak decays are studied within the framework of quantum chromodynamics (QCD) factorization. The QCD corrections to the longitudinal and transverse amplitudes are evaluated at next-to-leading order, and the branching fractions and polarization fractions are predicted. Numerically, the $Υ (n S) \to B_{c} ρ$ $Υ (n S) \to B_{c} ρ$ decays have relatively large branching fractions at the order of $𝒪 (1 0^{- 10})$ and are in the scope of the LHC and SuperKEKB/Belle-II experiments.

Keywords:

PACS: 12.39.St, 13.25.Gv

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