Lepton Flavor Violation: Constraints from exotic muon to electron conversion

Abstract

The exotic neutrinoless ${\mu }^{-}-e^{-}$ nuclear conversion is studied within the conventional extensions of the standard model as well as in the minimal supersymmetric (SUSY) models with and without R-parity conservation. The dependence of the ${\mu }^{-}-e^{-}$ conversion rates on the nucleon and nuclear structure is consistently taken into account. Using our calculated transition matrix elements and the available experimental data on the branching ratio $R_{\mu e^{-}}$ for ${}^{48}$Ti and ${}^{208}$Pb as well as the expected experimental sensitivity for ${}^{27}$Al employed as a target in the planned at Brookhaven ${\mu }^{-}-e^{-}$ conversion (MECO) experiment, we extract very severe constraints for the flavor violation parameters. We especially emphasize on the constraints resulting for SUSY R-parity violating parameters.

arXiv comment14 pages, 2 figures. Based on the Invited talk given by T.S. Kosmas at the International Conference on Non-Accelerator New Physics(NANP'99), Dubna, Russia, 1999

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Cited by in corpus (2)

• COMET Phase-I Technical Design Report
• Nuclear aspects of neutral current non-standard $\nu$-nucleus reactions and the role of the exotic ${\mu }^{-}\to e^{-}$ transitions experimental limits