Electroweak penguin diagrams and two-body {ital B} decays
- Department of Physics, Technion-Israel Institute of Technology, Haifa 32000 (Israel)
- Laboratoire de Physique Nucleaire, Universite de Montreal, Montreal, Quebec, H3C 3J7 (Canada)
- Enrico Fermi Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States)
We discuss the role of electroweak penguin diagrams in {ital B} decays to two light pseudoscalar mesons. We confirm that the extraction of the weak phase {alpha} through the isospin analysis involving {ital B}{r_arrow}{pi}{pi} decays is largely unaffected by such operators. However, the methods proposed to obtain weak and strong phases by relating {ital B}{r_arrow}{pi}{pi}, {ital B}{r_arrow}{pi}{ital K}, and {ital B}{r_arrow}{ital K{bar K}} decays through flavor SU(3) will be invalidated if eletroweak penguin diagrams are large. We show that, although the introduction of electroweak penguin contributions introduces no new amplitudes of flavor SU(3), there are a number of ways to experimentally measure the size of such effects. Finally, using SU(3) amplitude relations we present a new way of measuring the weak angle {gamma} which holds even in the presence of electroweak penguin diagrams.
- Research Organization:
- University of Chicago
- DOE Contract Number:
- FG02-90ER40560
- OSTI ID:
- 132991
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 11 Vol. 52; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Isospin structure of penguin diagrams and their consequences in [ital B] meson physics
Relative size of SU(3) symmetry-breaking effects and penguin diagrams