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Type: Journal article
Title: Direct CP violation in Λb→n(Λ)π+π- decays via ρ-ω mixing
Other Titles: Direct CP violation in Lambda b -> n(Lambda)pi+pi- decays via rho-omega mixing
Author: Guo, X.
Thomas, A.
Citation: Physical Review D: Particles, Fields, Gravitation and Cosmology, 1998; 58(9):096013-
Publisher: American Physical Society
Issue Date: 1998
ISSN: 0556-2821
Statement of
X.-H. Guo, A. W. Thomas
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.
Rights: ©1998 American Physical Society
DOI: 10.1103/PhysRevD.58.096013
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Special Research Centre for the Subatomic Structure of Matter publications

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