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Tau Decays into Three Charged Leptons and Two Neutrinos

Alam, M. S. and Barish, B. and Chadha, M. and Chan, S. and Eigen, G. and Miller, J. S. and O'Grady, C. and Schmidtler, M. and Urheim, J. and Würthwein, F. and Weinstein, Alan J. (1996) Tau Decays into Three Charged Leptons and Two Neutrinos. Physical Review Letters, 76 (15). pp. 2637-2641. ISSN 0031-9007.

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We search for the radiative leptonic tau decays τ→ee^+e^-ν_τν_e and τ→μe^+e^-ν_τν_μ using 3.60fb^(-1) of data collected by the CLEO-II experiment at the Cornell Electron Storage Ring. We present a first observation of the τ→ee^+e^-ν_τν_e process. For this channel we measure the branching fraction B(τ→ee^+e^-ν_τν_e) = (2.7_(-1.1-0.4-0.3)^(+1.5+0.4+0.1))×10^(-5). An upper limit is established for the second channel: B(τ→μe^+e^-ν_τν_μ)<3.2×10^(-5) at 90% C.L. Both results are consistent with the rates expected from standard model predictions.

Item Type:Article
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Weinstein, Alan J.0000-0002-0928-6784
Additional Information:© 1996 The American Physical Society. Received 22 November 1995; revised 8 February 1996; published in the issue dated 8 April 1996. We gratefully acknowledge the effort of the CESR staff in providing us with excellent luminosity and running conditions. This work was supported by the National Science Foundation, the U.S. Department of Energy, the Heisenberg Foundation, the Alexander von Humboldt Stiftung, the Natural Sciences and Engineering Research Council of Canada, and the A. P. Sloan Foundation.
Funding AgencyGrant Number
Department of Energy (DOE)UNSPECIFIED
Heisenberg FoundationUNSPECIFIED
Alexander von Humboldt StiftungUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
A. P. Sloan FoundationUNSPECIFIED
Classification Code:PACS: 13.35.Dx
Record Number:CaltechAUTHORS:20120207-091254691
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Official Citation:Tau Decays into Three Charged Leptons and Two Neutrinos M. S. Alam et al. ((CLEO Collaboration)) pp. 2637-2641
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29163
Deposited By: Ruth Sustaita
Deposited On:07 Feb 2012 17:33
Last Modified:27 Jan 2015 22:49

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