SEMINAR    Thursday, 16th November 2006 - h. 15:00 Aula Seminari (A-34)    E. Kravchenko (Budker INP - Novosibirsk) Precise Measurement of Tau Lepton Mass at Novosibirsk Abstract The status of the tau-threshold experiment carrying out at the VEPP-4M collider with the KEDR detector is reported. The specific feature of the experiment is high precision beam energy measurement using the resonant depolarisation method and continuous beam energy monitoring using the IR-light Compton backscattering. The preliminary tau mass result based on 6.7 pb^{-1} of data is m_{\tau} = 1776.80 +0.25-0.23 +- 0.15 MeV.