Open AccessMeasurement of the tau lepton mass by the Beijing Spectrometer (BES) Collaboration
Author(s) -
E. Soderstrom
Publication year - 1992
Language(s) - English
Resource type - Reports
DOI - 10.2172/10105275
Subject(s) - lepton , physics , nuclear physics , particle physics , bar (unit) , collider , electron , positron , spectrometer , atomic physics , quantum mechanics , meteorology
The mass of the 7 lepton has been measured at the Beijing Electron Positron Collider using the Beijing Spectrometer. A search near threshold for e+e- -+ ~$7~ was performed. Candidate events were identified by requiring that one 7 decay via T + evfi, and the other via r + puij. The mass value, obtained from a fit to the energy dependence of the T+T- cross section, is m, = 1776.9?::: Ax - 0.2 MeV.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom