PENGUIN DECAYS OFBMESONS

1 December 1998

journal article
Published by Annual Reviews in Annual Review of Nuclear and Particle Science

Vol. 48 (1) , 253-306
https://doi.org/10.1146/annurev.nucl.48.1.253

Abstract

▪ Abstract 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 → sγ and B → K*γ and gluonic penguins B → Kπ, B⁺→ ωK⁺and B → η′K, and their implications for the standard model and new physics. We conclude by exploring the future prospects for penguin physics.

Keywords

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Version 1, 1998-04-27, ArXiv

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