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arXiv · 2209.02086

Enhanced $B_q \to \ell\ell^\prime$ and $B \to (K, π) \ell\ell^\prime$ in light of $(g-2)_μ$

Wei-Shu Hou·Girish Kumar·Sven Teunissen
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Abstract

We study lepton flavor violating (LFV) $B$ decays in a general two Higgs doublet model with sub-TeV exotic scalars. Two different parameter spaces are explored: one dominated by extra top Yukawa coupling $ρ_{tt}$, the other by LFV couplings relevant for the muon $g-2$ anomaly. In the first case, flavor constraints such as $\ell \to \ell^\primeγ$, $h \to \ell\ell^\prime$ imply LFV $B$ decays are far below experimental sensitivities. The second case needs to be close to the alignment limit, but $B_q \to τμ$ and $B \to (K, π) τμ$ rates can lie within the sensitivities of Belle II and LHCb Upgrade II. Neutral $B$ meson mixings and $B,\, K,\, π\to \ell ν$ decays provide important flavor constraints on parameter space. $B$ decays involving $e$-$τ$ violation are constrained by $μ\to e$ processes.

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Wei-Shu Hou, Girish Kumar, Sven Teunissen. 2023-05-17. Enhanced $B_q \to \ell\ell^\prime$ and $B \to (K, π) \ell\ell^\prime$ in light of $(g-2)_μ$. https://doi.org/10.1103/physrevd.107.095017

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