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- W2913285890 abstract "In this paper, we investigate the contributions of hard spectator scattering and annihilation in $Bto PV$ decays within the QCD factorization framework. With available experimental data on $Bto pi K^{ast}$, $rho K$, rho$ and $Kphi$ decays, comprehensive $chi^2$ analyses of the parameters $X_{A,H}^{i,f}({rho}_{A,H}^{i,f},{phi}_{A,H}^{i,f})$ 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 $Bto PV$ decays; (2) At the current accuracy of experimental measurements and theoretical evaluations, $X_H=X_A^i$ is allowed by $Bto PV$ decays, but $X_{H}neq X_A^f$ 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 $Bto PP$ decays. Numerically, for $Bto PV$ decays, we obtain $(rho_{A,H}^i,phi_{A,H}^i[^{circ}]) =(2.87^{+0.66}_{-1.95}, -145^{+14}_{-21})$ and $(rho_A^f,phi_A^f[^{circ}]) = (0.91^{+0.12}_{-0.13}, -37^{+10}_{-9})$ 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 $A^{dir}_{CP}(B^- to pi^0 K^{{ast}-})$ compared with the most recent BABAR data, which presents a new obstacle in solving $pipi$ 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." @default.
- W2913285890 created "2019-02-21" @default.
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- W2913285890 date "2014-12-07" @default.
- W2913285890 modified "2023-10-12" @default.
- W2913285890 title "Constraints on the annihilation corrections in $B_{u,d}$ ${to}$ $PV$ decays within QCD factorization" @default.
- W2913285890 hasPublicationYear "2014" @default.
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