Enhanced direct CP violation in B^{+/}>ρ^{0}π^{+/}
Abstract
We study direct CP violation in the hadronic decay B^{+/}>ρ^{0}π^{+/}, including the effect of ρω mixing. We find that the CP violating asymmetry is strongly dependent on the CKM matrix elements, especially the Wolfenstein parameter η. For fixed N_{c} (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 N_{c} is small. Moreover, if N_{c} 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^{+/}>ρ^{0}π^{+/} would remove the mod(π) ambiguity in arg[ [V_{td}V^{*}_{tb}/V_{ud}V^{*}_{ub}].
 Publication:

Physical Review D
 Pub Date:
 March 2001
 DOI:
 10.1103/PhysRevD.63.056012
 arXiv:
 arXiv:hepph/0009042
 Bibcode:
 2001PhRvD..63e6012G
 Keywords:

 11.30.Er;
 12.39.x;
 13.25.Hw;
 Charge conjugation parity time reversal and other discrete symmetries;
 Phenomenological quark models;
 Decays of bottom mesons;
 High Energy Physics  Phenomenology
 EPrint:
 37 pages, 7 figures