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Enhanced direct CP violation and branching ratios in bottom hadron decays

  • X.-H. Guo
  • Gang LüEmail author
  • Z.-H. Zhang
Regular Article - Theoretical Physics

Abstract

In the framework of factorization we study direct CP violation in the decays of bottom hadrons containing a strange quark or a charm quark, H b f ρ 0(ω)→f π + π (H b is the bottom hadron and f is the product hadron) including the effect of ρω mixing. We find that the CP violating asymmetry can be enhanced greatly via the ρω mixing mechanism when the invariant mass of the π + π pair is in the vicinity of the ω resonance. For the processes associated with bd transitions, e.g. \(\bar{B}_{s}^{0}\rightarrow K^{0}\pi^{+}\pi^{-}\) , \(\bar{B}_{s}^{0}\rightarrow K^{*0}\pi^{+}\pi^{-}\) , B c D π + π , B c D *− π + π , Ξ b 0 Λ π + π , and Ω b Ξ π + π , the maximum CP violating asymmetries can reach about −84%, while for the processes associated with bs transitions, e.g. \(\bar{B}_{s}^{0}\rightarrow \phi\pi^{+}\pi^{-}\) , \(\bar{B}_{s}^{0}\rightarrow \eta\pi^{+}\pi^{-}\) , B c D s π + π , B c D s *− π + π , Ξ b Ξ π + π , and Ω b Ω π + π , the CP violating asymmetries can be enhanced to about 95%. Furthermore, taking ρω mixing into account we calculate the b-hadron decay branching ratios. We also discuss the possibility to observe the predicted CP violating asymmetries at the LHC.

PACS

11.30.Er 12.39.-x 13.20.He 12.15.Hh 

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2008

Authors and Affiliations

  1. 1.Institute of Low Energy Nuclear PhysicsBeijing Normal UniversityBeijingChina

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