Viehhauser G, Wang JC, Wolf A, Wu J, Csorna SE, McLean KW, Marka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, Greene R, Perera LP, Zhou GJ, Chan S, Eigen G, Lipeles E, Schmidtler M, Shapiro A, Sun WM, Urheim J, Weinstein AJ, Wurthwein F. Observation of radiative leptonic decay of the tau lepton.
PHYSICAL REVIEW LETTERS 2000;
84:830-834. [PMID:
11017384 DOI:
10.1103/physrevlett.84.830]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/1999] [Indexed: 05/23/2023]
Abstract
Using 4.68 fb(-1) of e(+)e(-) annihilation data collected with the CLEO II detector at the Cornell Electron Storage Ring, we have studied tau radiative decays tau(-)-->nu(tau)&mgr;(-)nu;(&mgr;)gamma and tau(-)-->nu(tau)e(-)nu;(e)gamma. For a 10 MeV minimum photon energy in the tau rest frame, the branching fraction for radiative tau decay to a muon or electron is measured to be (3.61+/-0.16+/-0. 35)x10(-3) or (1.75+/-0.06+/-0.17)x10(-2), respectively. The branching fractions are in agreement with standard model theoretical predictions.
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