Rescattering and electroweak penguin effects in determinations of the weak phase $γ$

Details Rescattering and electroweak penguin effects in determinations of the weak phase $γ$ Rescattering and electroweak penguin effects in determinations of the weak phase $γ$

1999-08-09

arxiv.org/abs/hep-ph/9908306v1

Nucl.Instrum.Meth.A446:18-27,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages with 6 included figures; invited talk given at the Beauty '99 conference, June 21-25, Bled, Slovenia

Scientific paper

10.1016/S0168-9002(00)00010-3

Determinations of the CKM phase $\gamma$ from weak nonleptonic $B$ decays are affected by electroweak (EW) penguins and rescattering effects. In this talk it is explained 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 final-state interactions on the determination of $\gamma$ from $B^+\to K\pi$ decays is studied numerically, showing that they can be important. A few alternative methods are discussed which use additional decays to eliminate their effects.

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