$B \to (\jpsi,η_c) K$ decays in the perturbative QCD approach

Abstract

In this paper, we calculated the $B \to (\jpsi, η_c) K$ decays in the perturbative QCD approach with the inclusion of the partial next-to-leading order (NLO) contributions. We found that (a) when the large enhancements from the known NLO contributions are taken into account, the NLO pQCD predictions for the branching ratios are the following: $Br(B^0 \to \jpsi K^0) = 5.2^{+3.5}_{-2.8}\times 10^{-4}$, $Br(B^+ \to \jpsi K^+) = 5.6^{+3.7}_{-2.9}\times 10^{-4}$, $Br(B^0\to {\eta }_c{K}^0)=5.5_{-2.0}^{+2.3}\times 10^{-4}$, $Br(B^{+}\to {\eta }_c{K}^{+})=5.9_{-2.1}^{+2.5}\times 10^{-4}$, which are roughly 40% smaller than the measured values, but basically agree with the data within $2-\sigma$ errors; (b) the NLO pQCD predictions for the CP-violating asymmetries of $B \to (\jpsi,η_c)K$ decays agree perfectly with the data.

18 pages, 3 figures, RevTex. some modifications in content,numerical results changed

References in corpus (5)

• Higher-Twist Distribution Amplitudes of the K Meson in QCD
• Branching ratios and CP asymmetries of $B\to K{\eta }^{(\prime )}$ decays in the pQCD approach
• Penguin pollution in the B^0 -> J/psi K_S decay
• Hadronic B decays
• NLO contributions to $B\to K{K}^{\ast }$ Decays in the pQCD approach

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• Implications for new physics from a novel puzzle in ${\bar{B}}_{(s)}^0\to D_{(s)}^{(\ast )+}\{{\pi }^{-},K^{-}\}$ decays
• Anatomy of $B\to K{\eta }^{(\prime )}$ decays in different mixing schemes and effects of next-to-leading order contributions in the perturbative QCD approach
• Implications on $\eta$-${\eta }^{\prime }$-glueball mixing from $B_{d/s}\to J/\Psi {\eta }^{{(}^{\prime })}$ Decays
• Phenomenological studies on the $B_{d,s}^0\to J/\psi f_0(500)[f_0(980)]$ decays
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