Rare B decays and Tevatron top-pair asymmetry

Chuan Hung Chen, Sandy S.C. Law, Run Hui Li

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10 Citations (Scopus)

Abstract

The recent Tevatron result on the top quark forwardbackward asymmetry, which deviates from its standard model prediction by 3.4σ, has prompted many authors to build new models to account for this anomaly. Among the various proposals, we find that those mechanisms which produce t t̄ via the t- or u-channel can have a strong correlation to the rare B decays. We demonstrate this link by studying a model with a new charged gauge boson, W′. In terms of the current measurements on B → πK decays, we conclude that the branching ratio for B? → π ? K̄0 is affected most by the new effects. Furthermore, using the world average branching ratio for the exclusive B decays at the 2σ level, we discuss the allowed values for the new parameters. Finally, we point out that the influence of the new physics effects on the direct CP asymmetry in B decays is insignificant.

Original languageEnglish
Article number115008
JournalJournal of Physics G: Nuclear and Particle Physics
Volume38
Issue number11
DOIs
Publication statusPublished - 2011 Nov 1

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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