Rescattering and electroweak penguin effects in determinations of the weakphase gamma

Authors
Pirjol, D
Citation
D. Pirjol, Rescattering and electroweak penguin effects in determinations of the weakphase gamma, NUCL INST A, 446(1-2), 2000, pp. 18-27
Citations number
40
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
446
Issue
1-2
Year of publication
2000
Pages
18 - 27
Database
ISI
SICI code
0168-9002(20000511)446:1-2<18:RAEPEI>2.0.ZU;2-7
Abstract
Determinations of the CKM phase gamma from weak nonleptonic B decays are af fected 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 f inal-state interactions on the determination of gamma from B+ --> K pi deca ys is studied numerically, showing that they can be important. A few altern ative methods are discussed which use additional decays to eliminate their effects. (C) 2000 Elsevier Science B.V. All rights reserved.