ar X iv : h ep - p h / 99 08 30 6 v 1 9 A ug 1 99 9 CLNS 99 / 1632 Rescattering and Electroweak Penguin Effects in Determinations of the Weak Phase γ ∗
نویسنده
چکیده
Determinations of the CKM phase γ from weak nonleptonic B decays are affected by electroweak (EW) penguins and rescattering effects. In this talk I explain how the EW penguin effects can be controlled with the help of SU(3) symmetry, by relating them to tree-level amplitudes. The impact of the finalstate interactions on the determination of γ from B+ → Kπ decays is studied numerically, showing that they can be important. A few alternative methods are discussed which use additional decays to eliminate their effects.
منابع مشابه
ar X iv : h ep - p h / 99 04 32 9 v 1 1 4 A pr 1 99 9 TECHNION - PH - 99 - 17 PENGUINS IN CP VIOLATING B DECAYS
The role of penguin amplitudes in CP violating B decays is reviewed, emphasizing recent progress in the analysis of electroweak penguin contributions. It is shown how these terms are included in a model-independent manner when measuring the weak phase α in B → ππ using isospin symmetry, and when determining the phase γ from B → Kπ applying flavor SU(3). Uncertainties due to rescattering effects...
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