The study of lifetimes and semileptonic (SL) decays of charmed mesons and baryons is currently the goal of several experiments all around the world. τ = h/ (Γₗeptonic + ΓLS + Γₙonleptonic) This paper is focussed on giving an overview of current status and open questions, and on reviewing new results by E687 and CLEO presented as contributed papers at this Conference. A wealth of detailed reviews exists on both charm lifetimes 5-2 and SL decays 3-4-1, some very up to date, which the reader can refer to for details.
Bianco S. (Mon,) studied this question.