Portal de Periódicos da CAPES

Measurement of the tau lifetime

1988; American Physical Society; Volume: 37; Issue: 7 Linguagem: Inglês

10.1103/physrevd.37.1750

1538-4500

D. Amidei, G. H. Trilling, G. S. Abrams, A. Baden, J. Boyer, F. Butler, G. Gidal, M. Gold, G. Goldhaber, L. Golding, J. S. Haggerty, D. Herrup, I. Juricic, J. A. Kadyk, M. E. Nelson, P. C. Rowson, H. Schellman, W. B. Schmidke, P. Sheldon, L. De Paula, D. Wood, J. A. Jaros, T. Barklow, A. M. Boyarski, P. R. Burchat, D. L. Burke, J. M. Dorfan, G. J. Feldman, L. Gladney, G. Hanson, K. Hayes, R. J. Hollebeek, W. R. Innes, D. Karlen, S. R. Klein, A. J. Lankford, R. R. Larsen, B. W. LeClaire, M. E. Levi, N. S. Lockyer, V. Lüth, C. Matteuzzi, R. A. Ong, M. L. Perl, B. Richter, K. Riles, J. Yelton, T. Schaad,

Neutrino Physics Research

We have used a high-resolution drift chamber in the Mark II detector at the SLAC storage ring PEP to measure the lifetime of \ensuremath{\tau} leptons produced in ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilations at 29 GeV. Based on the flight-path distribution of 807 three-prong \ensuremath{\tau} decays, the lifetime is found to be (2.88\ifmmode\pm\else\textpm\fi{}0.16 \ifmmode\pm\else\textpm\fi{}0.17)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}13}$ sec, in agreement with expectations for e-\ensuremath{\mu}-\ensuremath{\tau} universality.