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The II International Workshop on Tau Lepton Physics was held in Ohio, USA in September 1992. Its purpose is to gather the experts on tau lepton physics to examine the current understanding of the tau lepton physics and to assess future prospects. A particular emphasis of the Workshop was a detailed examination of the '1-prong problem': the discrepancy between the inclusive measurement of one-charged-particle decay branching ratio and the sum of the exclusive decays. The Workshop also stimulated new ideas on tests of the Standard Model using the third generation lepton and assessed the future prospects of the lepton physics.
The structure of the weak hadronic current coupled to the tau is investigated via some of the hadronic decays of the tau. The vector current coupling is determined by measuring the tau .-->. rho .nu./sub tau/ branching ratio. The axial-vector coupling is determined by measuring the tau .-->. .pi. .nu./sub tau/ branching ratio. The Cabibbo structure of the hadronic current is established by observing the decay tau .-->. K*(890).nu./sub tau/ and measuring its branching ratio. The branching ratios for the decays tau .-->. e anti .nu./sub e/.nu./sub tau/ and tau .-->. .mu. anti .nu./sub .mu./.nu./sub tau/ are measured as a normalization for the hadronic decays and as a check on the validity of the measurements. The leptonic branching ratios agree well with previous experiments. From a kinematic fit to the pion energy spectrum in the decay tau .-->. .pi. .nu./sub tau/, an upper limit (95% confidence level) of 245 MeV is placed on the tau neutrino mass. From a simultaneous fit of the center of mass energy dependence of the tau production cross section and the pion energy spectrum in the decay tau .-->. .pi. .nu./sub tau/, the tau mass is determined to be 1.787 +- 010 GeV/c. All properties of the tau measured here are consistent with it being a sequential lepton coupled to the ordinary weak hadronic current.