Exploring Lepton Non-universality in b → cl ¯ν < inf > l < /inf > Decay Modes in the Light of Recent Experimental Data

Abstract

The observation of lepton non-universality in B sector has become a challenge for universality lovers. Recently, the LHCb Collaboration has added a new RJ/ψ ratio into this challenging area, which has a 2σ deviation from its standard model prediction. In this regard, we present a model independent analysis of b → cl ¯νl decays in order to scrutinize the presence of lepton universality violation in B sector. We first perform a global fit to RD(*) data. We then estimate the lepton non-universality parameters of Bc → (ηc, J/ψ)lνl and Bs → Ds(*)l ¯νl decay processes.