CP Violation in Λ b → n ( Λ ) π + π − Decays via ρ − ω Mixing

Abstract

We study direct CP violation in the bottom baryon decays Λb → fρ0(ω) → fπ+π− (f = n or Λ). It is found that in these decays via ρ − ω mixing the CP violation could be very large when the invariant mass of the π+π− pair is in the vicinity of the ω resonance. With a typical value Nc = 2 in the factorization approach, the maximum CP-violating asymmetries are more than 50% and 68% for Λb → nπ+π− and Λb → Λπ+π−, respectively. With the aid of heavy quark symmetry and phenomenological models for the hadronic wave functions of Λb, Λ and the neutron, we estimate the branching ratios of Λb → n(Λ)ρ0. PACS Numbers: 11.30.Er, 12.15.Hh, 13.20.He, 12.39.Hg

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Cite this paper

@inproceedings{Guo1998CPVI, title={CP Violation in Λ b → n ( Λ ) π + π − Decays via ρ − ω Mixing}, author={Xin - Heng Guo and Anthony W. Thomas}, year={1998} }