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Type: Journal article
Title: Enhanced direct CP violation in B±→ρ0π±
Other Titles: Enhanced direct CP violation in B+/-->rho0pi+/-
Author: Guo, X.
Leitner, O.
Thomas, A.
Citation: Physical Review. D. Particles, Fields, Gravitation and Cosmology, 2001; 63(5):056012-1-056012-12
Publisher: American Physical Soc
Issue Date: 2001
ISSN: 1550-7998
Organisation: Special Research Centre for the Subatomic Structure of Matter
Statement of
X.-H. Guo, O. Leitner and A. W. Thomas
Abstract: We study direct CP violation in the hadronic decay B±→ρ0π±, including the effect of ρ-ω mixing. We find that the CP violating asymmetry is strongly dependent on the CKM matrix elements, especially the Wolfenstein parameter η. For fixed Nc (the effective parameter associated with factorization), the CP violating asymmetry a has a maximum of order 30%–50% when the invariant mass of the π+π- pair is in the vicinity of the ω resonance. The sensitivity of the asymmetry a to Nc is small. Moreover, if Nc is constrained using the latest experimental branching ratios from the CLEO Collaboration, we find that the sign of sin δ is always positive. Thus, a measurement of direct CP violation in B±→ρ0π± would remove the mod(π) ambiguity in arg[-[VtdVtb⋆/VudVub⋆].
Rights: ©2001 American Physical Society
RMID: 0020010483
DOI: 10.1103/PhysRevD.63.056012
Appears in Collections:Special Research Centre for the Subatomic Structure of Matter publications

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