A measurement of the tau lepton lifetime

M. Battle, J. Ernst, H. Kroha, S. Roberts, K. Sparks, E. H. Thorndike, C. H. Wang, R. Stroynowski, M. Artuso, M. Goldberg, N. Horwitz, R. Kennett, G. C. Moneti, F. Muheim, S. Playfer, Y. Rozen, P. Rubin, T. Skwarnicki, S. Stone, M. ThulasidasW. M. Yao, G. Zhu, A. V. Bernes, J. Bartelt, S. E. Csorna, Z. Egyed, V. Jain, T. Letson, M. D. Mestayer, P. Sheldon, D. S. Akerib, B. Barish, M. Chadha, D. F. Cowen, G. Eigen, J. S. Miller, J. Urheim, A. J. Weinstein, D. Acosta, G. Masek, B. Ong, H. Paar, M. Sivertz, A. Bean, J. Gronberg, R. Kutschke, S. Menary, R. J. Morrison, H. Nelson, J. Richman

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Using τ+τ- pairs in which one τ decays to leptons and the other decays to 3 charged particles we present a high statistics measurement of the τ lepton lifetime. The data used in this analysis were collected with the CLEO detector at CESR and consist of an integrated luminosity of 429 pb-1 taken at, above, and below the Υ{hooked} (4S). We use the vertex displacements of the 3 charged tracks to determine the τ lifetime and measure it to be (3.04 ± 0.14 ± 0.07) × 10-13s.

Original languageEnglish (US)
Pages (from-to)488-495
Number of pages8
JournalPhysics Letters B
Issue number4
StatePublished - Oct 1 1992

Bibliographical note

Funding Information:
We gratefullya cknowledgteh e effort of the CESR staff in providingu s with excellenltu minositya nd runningc onditionsJ.. P.A. and P.S.D. thank the PY 1 programo f the NSF, K.H. thankst heA lexandeyr on Humboldt Stiftung, G.E. thanks the Heisenberg FoundationK,. K.G. thankst heOJI programo f DOE and the SSC Fellowshipp rogramo f TNRLC, and R.P, and P.R. thank the A.P. Sloan Foundationfo r support. This work was supportedb y the National Science Foundationa ndthe US Departmenotf Energy.


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