NLO contributions to $B \to K K^*$ Decays in the pQCD approach

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dc.creatorZhang, Zhi-Qing
dc.creatorXiao, Zhen-Jun
dc.date2008-07-13
dc.date.accessioned2026-07-07T12:28:41Z
dc.date.available2026-07-07T12:28:41Z
dc.descriptionWe calculate the important next-to-leading-order (NLO) contributions to the $B \to K K^*$ 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 $Br(B^+ \to K^+ \bar{K}^{*0}) \approx 3.2\times 10^{-7}$, $Br(B^+ \to \bar{K}^0 {K}^{*+}) \approx 2.1\times 10^{-7}$, $Br(B^0/\ov{B}^0 \to K^0\bar{K}^{*0}+\bar{K}^0 K^{*0}) \approx 8.5\times 10^{-7}$, $Br(B^0/\ov{B}^0 \to K^+K^{*-} + K^-K^{*+}) \approx 1.3\times 10^{-7}$, 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 $\acp^{dir}(K^{*+}\bar{K}^0)\approx 6.5 %$.
dc.description29 pages,8 ps/eps figures, modified figures only
dc.identifierhttps://arxiv.org/abs/0807.2022
dc.identifierhttp://arxiv.org/abs/0807.2022
dc.identifierEur.Phys.J.C59:49-66,2009
dc.identifierdoi:10.1140/epjc/s10052-008-0805-1
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215619
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNLO contributions to $B \to K K^*$ Decays in the pQCD approach
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