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Calculation of pure annihilation type decay $B^+ \to D_s^+ \phi$
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abstract
The rare decay $B^+ \to D_s^+ \phi$ can occur only via annihilation type diagrams in the standard model. We calculate this decay in perturbative QCD approach with Sudakov resummation. We found that the branching ratio of $B^+ \to D_s^+ \phi$ is of order $10^{-7}$ which may be measured in the near future by KEK and SLAC $B$ factories. The small branching ratio predicted in standard model makes this channel sensitive to new physics contributions.
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Cited by 1 Pith paper
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Enhanced Quark-Loop Contribution to Pure Annihilation Nonleptonic B-meson decays in PQCD approach
Quark-loop NLO corrections to pure annihilation B decays leave branching ratios nearly unchanged but significantly enhance direct and mixing-induced CP asymmetries, with Bd to phi phi reaching about -40 percent.
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