The 16th International Workshop on Tau Lepton Physics (TAU2021) (Virtual Edition)

September 27, 2021 to October 1, 2021
Indiana University
America/Indiana/Indianapolis timezone

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

Oct 1, 2021, 10:50 AM
2h
Virtual (Indiana University)

Virtual

Indiana University

Poster contribution Tau2021 Abstracts

Speaker

Ms Aishwarya Bhatta (University of Hyderabad)

Description

Several indications of lepton non universality ratios, $R_{D^*}$, $R_{J/ \psi}$ and the measurements on hadronic and $\tau$ longitudinal polarizations in $b \to c \tau \bar{\nu_\tau}$ 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 measured branching ratios of ${B_c}^+ \to \tau^+ \nu_\tau$ and the keep going experimental results on $R_{D^*}$, $R_{J/ \psi}$ through a 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. Additionally, we also probe whether there could be any lepton universality violation in this decay processes.

What is your topic? Lepton universality and flavour violation

Primary author

Ms Aishwarya Bhatta (University of Hyderabad)