Lifetime measurements and Tau physics at PEP

Recent updates on the measurement of the τ and D0 lifetimes by the Mark II Collaboration and on measurements of the τ and B−hadron lifetimes by the MAC Collaboration are presented. A new determination of an upper limit for the tau neutrino mass by the Mark II Collaboration and a recent measurement of Cabibbo‐suppressed tau decay branching ratios from the DELCO Collaboration are also presented.