B0 ϕϕ Decay in Perturbative QCD Approach
Cai-Dian Lü, Yue-long Shen, Jin Zhu
Abstract
The rare decay B0 ϕϕ can occur only via penguin annihilation topology in the standard model. We calculate this channel in the perturbative QCD approach. The predicted branching ratio is very small at (10-8). We also give the polarization fractions, which shows that the transverse polarization contribution is comparable to the longitudinal one, due to a big transverse contribution from factorizable diagrams. The small branching ratio in SM, makes it sensitive to any new physics contributions.
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