https://doi.org/10.1140/epjp/s13360-022-03258-6
Regular Article
Study of 
decays in non-universal 
models and in a model-independent way
Department of Physics, National Institute of Technology Durgapur, 713209, Durgapur, West Bengal, India
Received:
25
March
2022
Accepted:
2
September
2022
Published online:
5
November
2022
Motivated by recent LHCb results, we have investigated decays in non-universal Z′ models and in a model-independent way. Here, different decay observables such as branching ratio, longitudinal lepton polarization asymmetry and lepton flavour universality (LFU) ratios are studied using three scenarios (S1, S2 and S3) in Z′ models and two scenarios [(i) 
and (ii) 
for the 
-channel; (i) 
and (ii) 
for the 
-channel] in a model-independent approach. Combining these model-independent new physics (NP) scenarios, we have structured 
NP WCs (Wilson coefficients) and 
NP WCs scenarios to predict LFU ratio 
From the -channel, our estimated branching ratios using these two scenarios 
for 
and 
for 
) are close to the experimental result 
. We have predicted the value of 
in the range 0.23 to 0.81 which is not measured experimentally so far.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
