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arXiv · 2001.08459

Study of semileptonic decay of $\bar{B}_s^0\to \phi l^+ l^-$ in QCD sum rule

Ying-Quan Peng·Mao-Zhi Yang
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Abstract

In this work we study the semi-leptonic decay of $\bar{B}_s^0\to \phi l^+ l^-$($l=e, \mu, \tau$) with QCD sum rule method. We calculate the $\bar{B}_s^0\to \phi$ translation form factors relevant to this semi-leptonic decay, then the branching ratios of $\bar{B}_s^0\to \phi l^+ l^-$($l=e, \mu, \tau$) decays are calculated with the form factors obtained here. Our result for the branching ratio of $\bar{B}_s^0\to \phi\mu^+ \mu^-$ agrees very well with the recent experimental data. For the unmeasured decay modes such as $\bar{B}_s^0\to \phi e^+ e^-$ and $\bar{B}_s^0\to \phi\tau^+ \tau^-$, we give theoretical predictions.

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Ying-Quan Peng, Mao-Zhi Yang. 2020-01-23. Study of semileptonic decay of $\bar{B}_s^0\to \phi l^+ l^-$ in QCD sum rule. https://arxiv.org/abs/2001.08459

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