CaltechAUTHORS
Published November 23, 1992 | Version Published
Journal Article Open

Measurement of the mass of the τ lepton

Creators

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 e^+e^-→τ^+τ^- 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 τ^+τ^- cross section, is m_τ=1776.9_(-0.5)^(+0.4)±0.2 MeV.

Additional Information

© 1992 The American Physical Society. Received 7 August 1992. We would like to thank the BEPC staff and the Computer Center at IHEP for their outstanding efforts, and also Y. S. Tsai and J. M. Wu for helpful discussions about the r ^+ r ^- cross section near threshold. This work was supported in part by the National Natural Science Foundation of China under Contract No. 19290400 OHEP); by the Department of Energy under Contracts No. DE-AC03-76SF00515 (SLAC), No. DE-FG03- 92ER40701 (Caltech), No. DE-FG03-91 ER40679 (UC Irvine), No. DE-FG02-91 ER40676 (Boston University), No. DE-AC02-76ER03069 (MIT), No. DE-AC35- 89ER40486 (SSC), and No. DE-FG05-92ER40736 (UT Dallas); by the Texas National Research Laboratory Commission (Rocky Mountain Consortium for High Energy Physics) under Contracts No. RGFY91 85 and No. RGFY9285 (Colorado State); and by the National Science Foundation (University of Washington).

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Additional details

Identifiers

Eprint ID
29676
Resolver ID
CaltechAUTHORS:20120309-143350443

Funding

National Natural Science Foundation of China
19290400
Department of Energy (DOE)
DE-AC03-76SF00515
Department of Energy (DOE)
DE-FG03-92-ER40701
Department of Energy (DOE)
DE-FG03-91 ER40679
Department of Energy (DOE)
DE-FG02-91 ER40676
Department of Energy (DOE)
DE-AC02-76ER03069
Department of Energy (DOE)
DE-AC35-89ER40486
Department of Energy (DOE)
DE-FG05-92ER40736
Texas National Research Laboratory Commission
RGFY91B5
Texas National Research Laboratory Commission
RGFY92B5
NSF

Dates

Created
2012-03-12
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field