Observation of radiative leptonic decay of the tau lepton

Journal article

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)andmgr;(-)nu;(andmgr;)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.

Authors: Viehhauser, G; Wang, J; Wolf, A; Wu, J; Csorna, SE

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 84
• Issue: 5
• Pages: 830-834
• Publication date: 2000-01-01
• DOI: 10.1103/physrevlett.84.830
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English