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arXiv · 1304.4413

Top FB asymmetry vs. (semi)leptonic B decays in multi-Higgs-doublet models

P. Ko·Yuji Omura·Chaehyun Yu
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Abstract

We investigate the semileptonic and leptonic B decays, B to D^{(*)} tau nu and B to tau nu in our multi-Higgs-doublet models, while keeping in mind the enhancement of the top forward-backward (FB) asymmetry (A^t_{FB}) at the Tevatron. In these models, the extra (pseudo)scalar bosons contribute to A^t_{FB} with large flavor-changing Yukawa couplings involving the top quark, but the contribution of the charged Higgs boson to A^t_{FB} is negligible. However, it may significantly affect B decays: especially, B to D^{(*)} tau nu and B to tau nu. We investigate the constraints on the B decays, based on the recent results in BaBar and Belle experiments, and discuss the possibility that the allowed parameter region in the B decays can achieve large A^t_{FB}.

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P. Ko, Yuji Omura, Chaehyun Yu. 2013-04-16. Top FB asymmetry vs. (semi)leptonic B decays in multi-Higgs-doublet models. https://arxiv.org/abs/1304.4413

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