Lepton Flavor Violation in a Long Baseline Experiment

Abstract

We evaluate the size of a coupling for a lepton flavor violating interaction with neutrinos (nLFV) in the minimal supersymmetric standard model with right-handed neutrinos (MSSMRN). It is expected that the nLFV interactions are detected in a long baseline neutrino oscillation experiment. We here deal with ${\mu }^{-}\to e^{-}{\bar{\nu }}_e{\nu }_{\tau }$ in ${\nu }_{\mu }\to {\nu }_{\tau }$ channel at a neutrino factory. First, we show the numerical study on feasibility to observe such interaction and point out that we can search for them with some oscillation channels. Next, we make a numerical calculation for the size of the nLFV coupling in the framework of the MSSMRN. A long baseline experiment is sensitive not only to the lepton mixings in the standard model but also to new physics effect.

3 pages, 3 figures, to appear in the proceedings of the 6th International Workshop on Neutrino Factory and Superbeams NuFact04, Osaka,Japan, July 26 - August 1, 2004