Constraints on the CKM Angle gamma from B -> K*+- pi-+

Abstract

We present constraints on the CKM parameter gamma=arg(Vub*) formed within the framework of SU(3) symmetry and based on charmless hadronic B decays to K*+- pi-+ and other pseudoscalar-vector final states. For strong phases of O(10 degrees), our analysis weakly favors cos(gamma)<0. We also estimate that a determination of $\gamma$ with an experimental uncertainty of less than $10^{\circ }$ can be attained with an order-of-magnitude improvement in the precision of the experimental inputs, but SU(3) symmetry breaking could introduce corrections approaching the size of the current experimental uncertainties.

Comments: 10 pages, 2 figures. Reformatted equations and added discussion of SU(3) symmetry breaking. Submitted to Physics Letters B