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A measurement of the tau mass

Authors
Journal
Physics Letters B
0370-2693
Publisher
Elsevier
Publication Date
Volume
292
Identifiers
DOI: 10.1016/0370-2693(92)90634-g
Disciplines
  • Physics

Abstract

Abstract Using the ARGUS detector at the DORIS II storage ring, a new measurement of the mass of the τ lepton has been obtained. An analysis of the tau pseudomass spectrum for decays of the type τ − → π − π − π + ν τ finds m τ = 1776.3±2.4±1.4 MeV/ c 2. This result also leads to an improvement of the upper limit on the ν τ mass to m ν τ < 31 MeV/ c 2 at the 95% confidence level.

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