supersymmetric standard model?

R-parity stands as an ad hoc assumption in the most popular version of the supersymmetric standard model. More than fifteen years’ studies of R-parity violations have been restricted to various limiting scenarios. We illustrate how the single-VEV parametrization provides a workable framework to analyze the phenomenology of the complete theory of supersymmetry without R-parity. In our comprehensive study of various aspects of the resulting leptonic phenomenology at tree-level, we find that the physical τ lepton could actually bear substantial gaugino and higgsino components, making it very different from the e and the μ. ——————— ⋆ Talk given by O.K. at Tau 98 conference, Santander, Spain, Sep 1998 — submission for proceedings. Could the τ be substantially different from e and μ in the supersymmetric standard model ? Mike Bisset, and Otto C. W. Kong ∗ , Cosmin Macesanu, and Lynne H. Orr Department of Physics, Tsinghua University, Beijing 100084, China Department of Physics and Astronomy, University of Rochester, Rochester NY 14627-0171, U.S.A. R-parity stands as an ad hoc assumption in the most popular version of the supersymmetric standard model. More than fifteen years’ studies of R-parity violations have been restricted to various limiting scenarios. We illustrate how the single-VEV parametrization provides a workable framework to analyze the phenomenology of the complete theory of supersymmetry without R-parity. In our comprehensive study of various aspects of the resulting leptonic phenomenology at tree-level, we find that the physical τ lepton could actually bear substantial gaugino and higgsino components, making it very different from the e and the μ.