NLO contributions to $B\to K{K}^{\ast }$ Decays in the pQCD approach

Abstract

We calculate the important next-to-leading-order (NLO) contributions to the $B\to K{K}^{\ast }$ decays from the vertex corrections, the quark loops, and the magnetic penguins in the perturbative QCD (pQCD) factorization approach. The pQCD predictions for the CP-averaged branching ratios are $Br(B^{+}\to K^{+}{\bar{K}}^{\ast 0})\approx 3.2\times 10^{-7}$, $Br(B^{+}\to {\bar{K}}^0{K}^{\ast +})\approx 2.1\times 10^{-7}$, $Br(B^0/\ov{B}^0 \to K^0\bar{K}^{*0}+\bar{K}^0 K^{*0}) \approx 8.5\times 10^{-7}$, $Br(B^0/\ov{B}^0 \to K^+K^{*-} + K^-K^{*+}) \approx 1.3\times 10^{-7}$, which agree well with both the experimental upper limits and the predictions based on the QCD factorization approach. Furthermore, the CP-violating asymmetries of the considered decay modes are also evaluated. The NLO pQCD predictions for $\acp(B^+ \to K^+\bar{K}^{*0})$ and $\acp(B^+ \to K^{*+}\bar{K}^{0})$ are $\acp^{dir}(K^+\bar{K}^{*0})\approx -6.9 %$ and $\acp^{dir}(K^{*+}\bar{K}^0)\approx 6.5 %$.

29 pages,8 ps/eps figures, modified figures only

References in corpus (6)

• Penguin-dominated B -> PV decays in NLO perturbative QCD
• Branching Ratio and CP Asymmetry of $B_s\to \rho (\omega )K$ Decays in the Perturbative QCD Approach
• Confined Chiral Solitons in the Spectral Quark Model
• Branching Ratio and CP Asymmetry of $B_s\to {\pi }^0{\eta }^{(\prime )}$ Decays in the perturbative QCD Approach
• Hadronic B decays
• $B\to K{K}^{\ast }$ Decays in the Perturbative QCD Approach

Cited by in corpus (5)

• Updating B --> PP, VP decays in the framework of flavor symmetry
• Hochschild homology, trace map and $\zeta$-cycles
• Charmless two-body $B$ meson decays in perturbative QCD factorization approach
• Reinvestigating the $B$ $\to$ $PV$ decays by including the contributions from ${\varphi }_{B2}$ with the perturbative QCD approach
• NLO contributions in the pQCD approach