Abstract
The mass of the τ lepton has been measured at the Beijing Electron-Positron Collider using the Beijing Spectrometer. A search near threshold for → was performed. Candidate events were identified by requiring that one τ decay via τ→eνν¯, and the other via τ→μνν¯. The mass value, obtained from a fit to the energy dependence of the cross section, is =1776.±0.2 MeV.
- Received 7 August 1992
DOI:https://doi.org/10.1103/PhysRevLett.69.3021
©1992 American Physical Society