Perturbative QCD analysis of $B \to φK^* $ decays

Details Perturbative QCD analysis of $B \to φK^* $ decays Perturbative QCD analysis of $B \to φK^* $ decays

2002-04-15

arxiv.org/abs/hep-ph/0204166v2

Phys.Rev. D66 (2002) 054013

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 2 tables, brief disscussion on hard sacle added, version to appear in PRD

Scientific paper

10.1103/PhysRevD.66.054013

We study the first observed charmless $B\to VV$ modes, the $B\to\phi K^*$ decays, in perturbative QCD formalism. The obtained branching ratios $B(B\to\phi K^*)\sim 15 \times 10^{-6}$ are larger than $\sim 9\times 10^{-6}$ from QCD factorization. The comparison of the predicted magnitudes and phases of the different helicity amplitudes, and branching ratios with experimental data can test the power counting rules, the evaluation of annihilation contributions, and the mechanism of dynamical penguin enhancement in perturbative QCD, respectively.

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