Rare B decays and Tevatron top-pair asymmetry

Abstract

The recent Tevatron result on the top quark forward-backward asymmetry, which deviates from its standard model prediction by 3.4$\sigma$, has prompted many authors to build new models to account for this anomaly. Among the various proposals, we find that those mechanisms which produce $t\bar{t}$ via $t$- 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, $W^{\prime }$. In terms of the current measurements on $B\to \pi K$ decays, we conclude that the branching ratio for $B^{-}\to {\pi }^{-}{\bar{K}}^0$ is affected most by the new effects. Furthermore, using the world average branching ratio for the exclusive B decays at $2\sigma$ 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.

15 page, 6 figures, typos corrected and references added, final version to appear journal

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Cited by in corpus (11)

• Testing new physics models by top charge asymmetry and polarization at the LHC
• Top quark forward-backward asymmetry and W^prime bosons
• Interpretations and Implications of the Top Quark Rapidity Asymmetries $A_{FB}^t$ and $A_{FB}^{\ell }$
• Next-to-leading order QCD effect of $W^{\prime }$ on top quark Forward-Backward Asymmetry
• New physics contributions to the forward-backward asymmetry at the Tevatron
• Measuring the Bottom-Quark Forward-Central Asymmetry at the LHC
• NLO QCD corrections to tW' and tZ' production in forward-backward asymmetry models
• Top quark forward-backward asymmetry in R-parity violating supersymmetry
• Implications of effective axial-vector coupling of gluon for $t\bar{t}$ spin polarizations at the LHC
• Tevatron Top Quark Forward-Backward Asymmetry -- Implications for Same-sign Top Quark Pair Production
• LHC and Tevatron constraints on a W' model interpretation of the top quark forward-backward asymmetry