Three different techniques are used to measure the mean decay length of the tau lepton with a high precision vertex detector in a sample of 11800 tau pairs coming from Z decays, collected in 1991 by ALEPH at LEP. Events in which both tau's decay into one charged track are analyzed using two largely independent methods. Displaced vertices in three-prong decays yield another independent measurement. The derived lifetime is 295.5 +/- 5.9 +/- 3.1 fs, using m(tau) = 1777.1 +/- 0.5 MeV/c(2). Including previous (1989-1990) ALEPH measurements, the combined tau lifetime is 294.7 +/- 5.4 +/- 3.0 fs.

D., B., D., D., C., G., J. P., L., M. N., M., B., M., et al. (1992). A Precise Measurement of the Tau-lepton Lifetime. PHYSICS LETTERS. SECTION B, 297(3-4), 432-448 [10.1016/0370-2693(92)91283-F].

A Precise Measurement of the Tau-lepton Lifetime

BOTTIGLI, UBALDO;CIOCCI, MARIA AGNESE;MARROCCHESI, PIER SIMONE;
1992-01-01

Abstract

Three different techniques are used to measure the mean decay length of the tau lepton with a high precision vertex detector in a sample of 11800 tau pairs coming from Z decays, collected in 1991 by ALEPH at LEP. Events in which both tau's decay into one charged track are analyzed using two largely independent methods. Displaced vertices in three-prong decays yield another independent measurement. The derived lifetime is 295.5 +/- 5.9 +/- 3.1 fs, using m(tau) = 1777.1 +/- 0.5 MeV/c(2). Including previous (1989-1990) ALEPH measurements, the combined tau lifetime is 294.7 +/- 5.4 +/- 3.0 fs.
1992
D., B., D., D., C., G., J. P., L., M. N., M., B., M., et al. (1992). A Precise Measurement of the Tau-lepton Lifetime. PHYSICS LETTERS. SECTION B, 297(3-4), 432-448 [10.1016/0370-2693(92)91283-F].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/37915
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