Investigation of Bd(s)∗→Dd+(Ds+)τ−v̄τ decays in W′ model and scalar leptoquark model

Abstract

Inspired by recent anomalies associated with the [Formula: see text] hadron decays, a theoretical investigation on [Formula: see text] decays has been performed in [Formula: see text] model and scalar leptoquark model. To implicate these models, new coupling parameters are fixed by [Formula: see text] fitting using recent experimental results from [Formula: see text] transition as constraints. We have estimated branching fraction, lepton flavor universality (LFU) parameter, forward–backward asymmetry and lepton-spin asymmetry in the standard model (SM) as well as above two new physics (NP) models. Except lepton-spin asymmetry, significant deviations from the SM predictions are observed in [Formula: see text] model for both channels. In comparison to other observables, lepton-spin asymmetry shifts slightly from the SM in scalar leptoquark model. Our results may be helpful to the experimental communities to explore these decays and [Formula: see text] boson and leptoquark at the colliders.