Top Quark Forward-Backward Asymmetry and Anomalous Right-Handed Charge Currents

Details Top Quark Forward-Backward Asymmetry and Anomalous Right-Handed Charge Currents Top Quark Forward-Backward Asymmetry and Anomalous Right-Handed Charge Currents

2011-10-25

arxiv.org/abs/1110.5630v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 8 figures, references added, minor changes to text, new collider signatures added, matches version accepted for publ

Scientific paper

Recent measurements of the top quark forward-backward asymmetry at the Tevatron could hint at new physics with an unexpected flavor structure. The significance of such an abnormal flavor structure in alleviating the tension between the various determinations of $|V_{ub}|$ via right-handed charge currents is studied. In particular, we elaborate on how the associated new flavor changing couplings naturally allow for the generation of anomalous loop-induced right-handed charge currents which can simultaneously remove the tension in the determinations of $|V_{ub}|$ and escape the tight indirect bounds from $B \ra X_s \gamma$.

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