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Implications of new physics in $\Lambda_b \to \Lambda_c \ell \nu_{\ell}$ decay processes

Aishwarya Bhatta, Rukmani Mohanta

SciPost Phys. Proc. 16, 012 (2025) · published 14 July 2025

Proceedings event

16th International Workshop on Tau Lepton Physics

Abstract

Several indications of lepton non universality ratios, $R{(D^*)}$, $R{(J/\Psi)}$ and the measurements on hadronic and $\tau$ longitudinal polarizations in $b \to c \ell \bar{\nu_{\tau}}$ processes have attracted a lot of attentions. By considering the most general effective Lagrangian, we carry out a model independent analysis of the semileptonic $\Lambda_b$ decays, to inspect the nature of new physics. We constraint the new physics parameter space by using the chi square fitting. We study the implications of constrained new couplings on the observable such as branching fractions, forward-backward asymmetries, lepton non universality parameter and $\Lambda_c$ and lepton longitudinal polarization fractions of the decay modes.


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