Calculations of penguin diagrams in B decays

Details Calculations of penguin diagrams in B decays Calculations of penguin diagrams in B decays

1997-03-27

arxiv.org/abs/hep-ph/9703439v2

Phys.Lett. B400 (1997) 188-193

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 14 pages, including 3 figures (Postscript)

Scientific paper

10.1016/S0370-2693(97)00343-2

We analyze the effects of the space-like penguin diagrams in two body B decays $B^-\to K^-{\bar K}^0$ and $B^-\to \pi^-{\bar K}^0$. Special attention is paid to the operator $Q_6$, whose contribution is large in the BSW model, but vanishes in the PQCD method in the approximation of neglecting the masses in the final states. Suppressions of the space-like penguin diagrams are found in the PQCD method, which implies that the contributions of the space-like penguins are small compared to those of the time-like penguins.

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