The tau lepton lifetime has been measured with the e+e - → τ+τ- 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 τ decay channels. Two measurements have been made using events in which both taus decay to a single charged particle. Combining these measurements gave ττ(1 prong) = 291.8 ± 2.3stat ± 1.5sys fs. A third measurement using taus which decayed to three charged particles yielded τtau (3 prong) = 288.6± 2.4stat ± 1.3sys fs. These were combined with previous DELPHI results to measure the tau lifetime, using the full LEP1 data sample, to be τ τ = 290.9 ± 1.4stat ± 1.0sys fs. © Springer-Verlag / Società Italiana di Fisica 2004.

Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., et al. (2004). A precise measurement of the tau lifetime. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 36(3), 283-296 [10.1140/epjc/s2004-01953-7].

A precise measurement of the tau lifetime

CALVI, MARTA;PAGANONI, MARCO;TABARELLI DE FATIS, TOMMASO;
2004

Abstract

The tau lepton lifetime has been measured with the e+e - → τ+τ- 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 τ decay channels. Two measurements have been made using events in which both taus decay to a single charged particle. Combining these measurements gave ττ(1 prong) = 291.8 ± 2.3stat ± 1.5sys fs. A third measurement using taus which decayed to three charged particles yielded τtau (3 prong) = 288.6± 2.4stat ± 1.3sys fs. These were combined with previous DELPHI results to measure the tau lifetime, using the full LEP1 data sample, to be τ τ = 290.9 ± 1.4stat ± 1.0sys fs. © Springer-Verlag / Società Italiana di Fisica 2004.
Articolo in rivista - Articolo scientifico
Engineering (miscellaneous); Physics and Astronomy (miscellaneous)
English
2004
36
3
283
296
none
Abdallah, J., Abreu, P., Adam, W., Adzic, P., Albrecht, T., Alderweireld, T., et al. (2004). A precise measurement of the tau lifetime. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 36(3), 283-296 [10.1140/epjc/s2004-01953-7].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/155893
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