Chang, Q (reprint author), Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Peoples R China.
In this paper, we investigate the contributions of hard spectator scattering and annihilation in B -> PV decays within the QCD factorization framework. With available experimental data on B -> pi K*, rho K, pi rho and K phi decays, comprehensive chi(2) analyses of the parameters X-A,H(i,f)(rho(i,f)(A,H), phi(i,f)(A,H)) are performed, where X-A(f)(X-A(i)) and X-H are used to parameterize the endpoint divergences of the (non) factorizable annihilation and hard spectator scattering amplitudes, respectively. Based on chi(2) analyses, it is observed that (1) The topology-dependent parameterization scheme is feasible for B -> PV decays; (2) At the current accuracy of experimental measurements and theoretical evaluations, X-H = X-A(i) is allowed by B -> PV decays, but X-H not equal X-A(f) at 68% C.L.; (3) With the simplification X-H = X-A(i), parameters X-A(f) and X-A(i) should be treated individually. The above-described findings are very similar to those obtained from B -> PP decays. Numerically, for B -> PV decays, we obtain (rho(i)(A,H), phi(i)(A,H)[degrees]) = (2.87(-1.95)(+0.66), -145(-21)(+14)) and (rho(f)(A), phi(f)(A)[degrees]) = (0.91(-0.13)(+0.12), -37(-9)(+10)) at 68% C.L. With the best-fit values, most of the theoretical results are in good agreement with the experimental data within errors. However, significant corrections to the color-suppressed tree amplitude alpha(2) related to a large rho H result in the wrong sign for A(CP)(dir)(B- -> pi K-0*(-)) compared with the most recent BABAR data, which presents a new obstacle in solving "pi pi" and "pi K" puzzles through alpha(2). A crosscheck with measurements at Belle (or Belle II) and LHCb, which offer higher precision, is urgently expected to confirm or refute such possible mismatch. (C) 2015 The Authors. Published by Elsevier B.V.
National Natural Science Foundation of China [11475055, 11105043, 11147008, 11275057, U1232101]
; Foundation for the Author of National Excellent Doctoral Dissertation of the People's Republic of China 
; Program for Science and Technology Innovation Talents in Universities of Henan Province [14HASTIT036]