Looking for the effects of New Physics in the ${\mathrm{\Lambda }}_b⟶{\mathrm{\Lambda }}_c(\to \mathrm{\Lambda }\pi )\mathrm{\ell }\nu$ decay mode

One of the most pragmatic ways to look for the effects of New Physics at low energy scales is to study a detailed angular distribution of various decay modes, and in particular those based on $b\to c\mathrm{\ell }{\bar{\nu }}_{\mathrm{\ell }}$. In this paper we focus onto ${\mathrm{\Lambda }}_b⟶{\mathrm{\Lambda }}_c(\to \mathrm{\Lambda }\pi )\mathrm{\ell }\nu$ in a generic effective theory setup in which, besides the Standard Model, we allow for all the possible covariant dimension-six effective operators capturing the contributions arising at high energy scales, beyond the Standard Model. We list a number of observables that could be used as a diagnostic tool to check for the presence of New Physics and to discriminate among its various scenarios. We also briefly comment on ${\mathrm{\Lambda }}_c\to \mathrm{\Lambda }l\nu$.