Subleading Corrections to Semileptonic Lambda_c Decays

Abstract

The semileptonic decay $\Lambda_c \to \Lambda \ell \nu$ is considered in the framework of heavy quark effective theory beyond the leading order in the $1/m_c$ expansion. According to our estimate the polarization variable will receive only very small corrections such that $\alpha_{\Lambda_c} \le -0.95$.