Analysis of $b \to c \ell \nu $ baryonic decay modes in SMEFT approach

TL;DR

This paper investigates $b o c au u$ baryonic decays within the SMEFT framework, analyzing their potential to reveal new physics through various observables in semileptonic $B$ decays.

Contribution

It provides a detailed SMEFT-based analysis of $b o c au u$ baryonic decay modes, exploring their sensitivity to new physics operators and potential deviations from the Standard Model.

Findings

Sensitivity of decay observables to new physics operators

Potential deviations in branching ratios and asymmetries

Feasibility of using baryonic decays to probe new physics

Abstract

The flavor-changing neutral current decays of heavy bottom quark, alongside the flavor-changing charged current processes mediated by $b \to (c, u)$ in semileptonic $B$ decays are emerged as powerful tools for exploring physics beyond the Standard Model. In this work, we focus on the feasibility of interpreting the processes mediated by $b \to c \tau \nu$ transitions, in particular, the semileptonic $b$-baryonic decay modes $\Sigma_b \to \Sigma_c^{(*)} \tau^-\bar{\nu}_\tau$ and $\Xi_b \to \Xi_c \tau^-\bar{\nu}_\tau$ in the context of SMEFT approach. We perform a detailed analysis of the sensitivity of new physics operators on various observables such as branching ratio, forward-backward asymmetry parameter, lepton non-universal observable and the longitudinal polarization fraction of the $b$-baryonic decay channels.