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.

J.ABDALLAH, P.ABREU, W.ADAM, P.ADZIC, T.ALBRECHT, T.ALDERWEIRELD, et al. (2004). A Precise Measurement of the Tau Lifetime. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 36, 283-296 [10.1140/epjc/s2004-01953-7].

A Precise Measurement of the Tau Lifetime

NAVARRIA, FRANCESCO LUIGI;PAIANO, SIMONE;PERROTTA, ANDREA;ROVELLI, TIZIANO;
2004

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.
2004
J.ABDALLAH, P.ABREU, W.ADAM, P.ADZIC, T.ALBRECHT, T.ALDERWEIRELD, et al. (2004). A Precise Measurement of the Tau Lifetime. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 36, 283-296 [10.1140/epjc/s2004-01953-7].
J.ABDALLAH; P.ABREU; W.ADAM; P.ADZIC; T.ALBRECHT; T.ALDERWEIRELD; R.ALEMANY-FERNANDEZ; T.ALLMENDINGER; P.ALLPORT; U.AMALDI; N.AMAPANE; S.AMATO; E.ANAS...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/2093
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