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New Physics Effect on Bs, d → l+l− Decays

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Abstract

The rare leptonic decays Bs, d → l+l− (l = e, μ, τ) present an important base to analyse the flavour structure of the standard model (SM) and also become a potential source to dig out possible signatures of new physics (NP) beyond the SM. The muonic decay Bs, d → μ+μ− has been observed at the LHC as well as the upper limits of branching ratios for other Bs, d → l+l− decays have been updated recently. In this paper, using the χ2 fitting method we have studied all these decay channels considering the effect of a Z′ boson. Our analysing method reproduces the result of the muonic channel of Bs meson, hence we have used the same strategy for the other Bs, d → l+l− decays.

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Acknowledgements

S. Biswas acknowledges NIT Durgapur for providing fellowship for her research work. P. Nayek and S. Sahoo would like to thank SERB, DST, Govt. of India for financial support through grant no. EMR/2015/000817. P. Maji thanks DST, Government of India for providing INSPIRE Fellowship (Code – IF160115) during her research.

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

    S. Biswas, P. Nayek, P. Maji & S. Sahoo

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  1. S. Biswas
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Biswas, S., Nayek, P., Maji, P. et al. New Physics Effect on Bs, d → l+l− Decays. Int J Theor Phys 60, 893–916 (2021). https://doi.org/10.1007/s10773-021-04713-3

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