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

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Abstract

Determinations of the CKM phase y 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 final-state interactions on the determination of y 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.

Original languageEnglish
Pages (from-to)18-27
Number of pages10
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume446
Issue number1-2
DOIs
StatePublished - 2000

Keywords

  • B quarks
  • CKM parameter
  • CP violation

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