A measurement of the tau lifetime
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A measurement of the tau lifetime

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A measurement of the tau lifetime

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DELPHI Collaboration; Allen, Paul; Chrin, J. T. M.; Castillo Giménez, María Victoria Perfil; Cortina Gil, Eduardo; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; Fez Laso, M. D. M. de; Gómez Cadenas, Juan José Perfil; García García, Carmen Perfil; Hernández Rey, Juan José Perfil; Higón Rodríguez, Emilio Perfil; Lacasta Llácer, Carlos; Lozano Bahilo, José Julio; Martí García, Salvador; Salt Cairols, José Perfil; Valls Ferrer, Juan Antonio; Zúñiga Román, Juan
This document is a artículoDate1993

Este documento está disponible también en : http://hdl.handle.net/10550/53828
The tau lepton lifetime is measured using four different methods with the DELPHI detector. Three measurements using one prong decays are combined, accounting for correlations, resulting in tau(tau) = 298 +/- 7 (stat.) +/- 4 (syst.) fs while the decay length distribution of three prong decays gives tau(tau) = 298 +/- 13 (stat.) +/- 5 (syst.) fs. The combined result is tau(tau) = 298 +/- 7 fs. The ratio of the Fermi coupling constant from tau decay relative to that from muon decay is found to be 0.985 +/- 0.013, compatible with lepton universality.

    DELPHI Collaboration Allen, Paul Chrin, J. T. M. Castillo Giménez, María Victoria Cortina Gil, Eduardo Ferrer Soria, Antonio Fuster Verdú, Juan A. Fez Laso, M. D. M. de Gómez Cadenas, Juan José García García, Carmen Hernández Rey, Juan José Higón Rodríguez, Emilio Lacasta Llácer, Carlos Lozano Bahilo, José Julio Martí García, Salvador Salt Cairols, José Valls Ferrer, Juan Antonio Zúñiga Román, Juan 1993 A measurement of the tau lifetime Physics Letters B 302 2-3 356 368
http://dx.doi.org/10.1016/0370-2693(93)90409-B

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