A Precise Measurement of the Tau Lifetime
The DELPHI Collaboration: J. Abdallah, et al

TL;DR
This paper reports a precise measurement of the tau lepton lifetime using data from the DELPHI detector at LEP, employing multiple decay channels and combining results for an improved accuracy.
Contribution
It provides the most precise measurement of the tau lifetime by combining multiple decay modes and previous results from the DELPHI experiment.
Findings
Tau lifetime measured as 290.9 +/- 1.4 (stat) +/- 1.0 (sys) fs.
Used multiple decay channels for improved accuracy.
Combined new measurements with previous data for a precise result.
Abstract
The tau lepton lifetime has been measured with the e+e- -> tau+tau- events collected by the DELPHI detector at LEP in the years 1991-1995. Three different methods have been exploited, using both one-prong and three-prong tau decay channels. Two measurements have been made using events in which both taus decay to a single charged particle. Combining these measurements gave tau_tau (1 prong) = 291.8 +/- 2.3 (stat) +/- 1.5 (sys) fs. A third measurement using taus which decayed to three charged particles yielded tau_tau (3 prong) = 288.6 +/- 2.4 (stat) +/- 1.3 (sys) fs. These were combined with previous DELPHI results to measure the tau lifetime, using the full LEP1 data sample, to be tau_tau = 290.9 +/- 1.4 (stat) +/- 1.0 (sys) fs.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
