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ISSN - 09205632, Nuclear Physics B - Proceedings Supplements, 2011, vol. 218, p. 172-177

τ lepton lifetime determination at Belle

Eidelman S. I.

A method of the τ lepton lifetime measurement improving the present accuracy by a factor of about two is reported. The value of an upper limit on the relative lifetime difference between positive and negative τ leptons is obtained. These results are based on 711fb-1 of data collected at the Υ(4S) resonance. © 2011 Elsevier B.V.