Tau-Universality Violation with Light Neutralinos

Abstract

In a supersymmetric model with the lightest supersymmetric particle (LSP) $\chi$ in the range of a few hundred MeV's, the decay $\tau ⟶\mu \chi \chi$ is going to be allowed. We investigate the departure from tau-universality caused by this decay. It is found that the universality violation in this way can be greater than both non-universal electroweak radiative corrections and supersymmetric one-loop corrections over a considerable region of the parameter space allowed by experiments so far. Thus it suggests a method of constraining the parameter space with light LSP's using data from tau-factories.

11 pages, LATEX, 3 figures (hard copies of figures available from the Authors on request)

References in corpus (7)

• Do Deep Inelastic Scattering Data Favor a Light Gluino
• LEP and radiative electroweak breaking close the light gluino window
• Photoproduction of Very Light Gluinos
• Closing the Light Gluino Window in Supersymmetric Grand Unified Models
• Light Neutralinos in B-Decays
• Can We Identify a Light Neutralino in B-Factories
• Chasing the light-gluino scenario through $b\to s\gamma$