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Study of $B_{s}^{0} \to ℓ^{+} ℓ^{-} γ$ $B_{s}^{0} \to ℓ^{+} ℓ^{-} γ$ decays in a nonuniversal $Z^{'}$ model

D. Banerjee

Department of Physics, National Institute of Technology, Durgapur 713209, West Bengal, India

E-mail Address: rumidebika@gmail.com

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M. Kumar

Department of Physics, National Institute of Technology, Durgapur 713209, West Bengal, India

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P. Nayek

Department of Physics, National Institute of Technology, Durgapur 713209, West Bengal, India

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, and

S. Sahoo

Department of Physics, National Institute of Technology, Durgapur 713209, West Bengal, India

E-mail Address: sukadevsahoo@yahoo.com

Corresponding author.

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https://doi.org/10.1142/S0217751X19500489Cited by:2 (Source: Crossref)

Abstract

We investigate $B_{s}^{0} \to ℓ^{+} ℓ^{-} γ$ decays in a nonuniversal $Z^{'}$ model derived from the extension of the Standard Model (SM). Considering the $Z^{'}$ -mediated flavor-changing neutral current (FCNC) effects, we calculate the branching ratio and forward–backward asymmetry $(A_{FB})$ for $B_{s}^{0} \to ℓ^{+} ℓ^{-} γ$ decay processes. We compare the obtained results with predictions of the SM and discuss the sensitivity of the observables to $Z^{'}$ boson coupling parameters. We find that the branching ratios are enhanced by one order from SM predictions in $Z^{'}$ model scenario. We also observe that the variation of forward–backward asymmetry with the $Z^{'}$ boson coupling parameters portrays discrimination between NP effects and SM results.

Keywords:

PACS: 13.20.He, 13.20.-v, 14.70.Pw, 12.60.-i

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