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One of the most pragmatic ways to look for the effects of New Physics at lowenergy scales is to study a detailed angular distribution of various decaymodes, and in particular those based on $b\to c\ell\bar \nu_\ell$. In thispaper we focus onto $\Lambda_b \longrightarrow \Lambda_c(\to \Lambda \pi) \ell\nu$ in a generic effective theory setup in which, besides the Standard Model,we allow for all the possible covariant dimension-six effective operatorscapturing the contributions arising at high energy scales, beyond the StandardModel. We list a number of observables that could be used as a diagnostic toolto check for the presence of New Physics and to discriminate among its variousscenarios. We also briefly comment on $\Lambda_c \to \Lambda l\nu$.

Looking for the effects of New Physics in the $\Lambda_b \longrightarrow \Lambda_c(\to \Lambda \pi) \ell \nu $ decay mode