Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1998-04-27
Ann.Rev.Nucl.Part.Sci. 48 (1998) 253-306
Physics
High Energy Physics
High Energy Physics - Experiment
49 pages, LATEX, 30 embedded figures, submitted to Annual Reviews of Nuclear and Particle Science
Scientific paper
10.1146/annurev.nucl.48.1.253
Penguin, or loop, decays of B mesons induce effective flavor-changing neutral currents, which are forbidden at tree level in the Standard Model. These decays give special insight into the CKM matrix and are sensitive to non-standard model effects. In this review, we give a historical and theoretical introduction to penguins and a description of the various types of penguin processes: electromagnetic, electroweak, and gluonic. We review the experimental searches for penguin decays, including the measurements of the electromagnetic penguins b -> s gamma and B -> K* gamma and gluonic penguins B -> K pi, B+ -> omega K+ and B -> eta' K, and their implications for the Standard Model and New Physics. We conclude by exploring the future prospects for penguin physics.
Lingel Karen
Skwarnicki Tomasz
Smith James G.
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