Eur Phys J C (2004) 33: s647-s649
https://doi.org/10.1140/epjcd/s2004-03-1612-4

PS07 Tests of the Standard Model

New results on τ lepton

Department of Physics, The Ohio State University, Columbus, OH 43210, USA

Received: 5 December 2003
Accepted: 14 January 2004
Published online: 3 February 2004

Abstract

This is a review of new results on the τ lepton. The lifetime has been measured with improved precision, allowing the test of lepton universality to 0.2% level. There are several new measurements of the branching ratios for the hadronic decays, including much improved measurements for the Cabibbo-suppressed decays. All results are consistent with the Standard Model expectations.