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arXiv · 1210.5076

B decay anomalies in an effective theory

Debajyoti Choudhury·Dilip Kumar Ghosh·Anirban Kundu
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Abstract

We investigate how far a new physics scenario affecting primarily the third generation fermions can ameliorate the tension between B-decay observables and Standard Model expectations. Adopting a model-independent approach, we find that among the three observables that show signs of such a tension, viz. the branching fractions for $B^+\toτν$, $B_d\to D(D^\ast)τν$, and the like-sign dimuon anomaly in neutral B decays, the first two can be explained adequately, while there is only a marginal improvement for the third. As a spin-off, it is shown that one can also accommodate a change in the branching fraction of the Higgs boson to a $τ$ lepton pair from the SM expectation, if such a change is established in future data.

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Debajyoti Choudhury, Dilip Kumar Ghosh, Anirban Kundu. 2013-01-04. B decay anomalies in an effective theory. https://doi.org/10.1103/physrevd.86.114037

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