Tau decays into three charged leptons and two neutrinos
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Issue Date
1996-04Author
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
Publisher
AMERICAN PHYSICAL SOC
Type
Article
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Show full item recordAbstract
We search for the radiative leptonic tau decays tau --> ee(+) e(-)nu(tau)nu(e) and tau --> mu e(+)e(-)nu(tau)nu(mu) using 3.60 fb(-1) of data collected by the CLEO-II experiment at the Cornell Electron Storage Ring. We present a first observation of the tau --> ee(+)e(-)nu(tau)nu(e) process. For this channel we measure the branching fraction B(tau --> ee(+)e(-)nu(tau)nu(e)) = (2.7(-1.1-0.4-0.3)(+1.5+0.4+0.1)) X 10(-5). An upper limit is established for the second channel: B(tau --> mu e(+)e(-)nu(tau)nu(mu)) < 3.2 X 10(-5) at 90% C.L. Both results are consistent with the rates expected from standard model predictions.
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Citation
Alam, MS, Kim, IJ, et al. Tau decays into three charged leptons and two neutrinos. PHYSICAL REVIEW LETTERS. April 1996. 76(15) : 2637-2641
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