Phenomenology of $\Xi_b \to \Xi_c\,\tau\,\nu$ decays

TL;DR

This paper investigates the decay process $\Xi_b o \Xi_c au u$ using helicity formalism, providing numerical predictions for observables and exploring potential new physics effects in light of deviations observed in similar semileptonic B decays.

Contribution

It offers the first detailed analysis of $\Xi_b o \Xi_c au u$ decays, including predictions of various observables and the impact of new physics scenarios.

Findings

Predicted decay rate and branching ratio ratios.

Calculated lepton forward-backward asymmetries.

Estimated new physics effects on observables.

Abstract

Deviations from the standard model prediction have been reported in various semileptonic $B$ decays mediated via $b \to c$ charged current interactions. In this context, we analyze semileptonic baryon decays $\Xi_b \to \Xi_c\,\tau\,\nu$ using the helicity formalism. We report numerical results on various observables such as the decay rate, ratio of branching ratio, lepton side forward backward asymmetries, longitudinal polarization fraction of the lepton, and the convexity parameter for this decay mode using results of relativistic quark model. We also provide an estimate of the new physics effect on these observables under various new physics scenarios.