CP Violation and Strong Phases from Penguins in ${\mathbf{B}}^{\pm }\to \mathbf{VV}$ Decays

Abstract

We calculate direct CP-violating observables in charged $B\to VV$ decays arising from the interference of amplitudes with different strong and CKM phases. The perturbative strong phases develop at order ${\alpha }_s$ from absorptive parts of one-loop matrix elements of the next-to-leading logarithm corrected effective Hamiltonian. CPT constraints are maintained. Based on this model, we find that partial rate asymmetries between charge conjugate $B^{\pm }$ decays can be as high as 15-30\% for certain channels with branching ratios in the $10^{-6}$ range. The small values of the coefficients of angular correlations, which we calculated previously to be of order $10^{-2}$, are not significantly degraded by the strong phases. The charge asymmetries of rates and angular distributions would provide unambiguous evidence for direct CP violation.

arXiv comment24 pages, 3 figures (upon request), LaTeX, preprint DESY 93-192

References in corpus (1)

• Effect of Hairpin Diagram on Two-body Nonleptonic B Decays and CP Violation

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