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arXiv · 2510.03739

Angular observables and branching ratio for $B_s\to \phi \ell^+ \ell^-$ decay

Aidos Issadykov
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Abstract

In this paper, an analysis of the $B_s\to \phi \ell^+ \ell^-$ rare decay is presented within the framework of the covariant confined quark model. The $B_s\to \phi$ transition form factors are calculated and then used to compute the branching fractions and angular observables in various $q^2$ bins, including the forward-backward asymmetry $A_{FB}$, the longitudinal polarization $F_L$, and the optimized observables $A_i$ and $S_i$. The results show agreement with the latest experimental data given by LHCb collaboration and compared with available theoretical predictions.

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Aidos Issadykov. 2025-10-04. Angular observables and branching ratio for $B_s\to \phi \ell^+ \ell^-$ decay. https://arxiv.org/abs/2510.03739

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