The ${\mathbf{e}}^{-}{\mathbf{e}}^{-}$ mode of LC: opportunities to discover loop-level lepton flavor (number) violation

Abstract

The $e^{-}{e}^{-}$ mode with lepton number $L=+2$ of the initial state is particularly suitable for studying lepton and flavor number violating reactions (LFV). In this brief report we give a summary of the study of two loop-level reactions which violate lepton and flavor numbers: we first consider seesaw type models with heavy Majorana neutrinos at the TeV scale and study the reactions $e^{-}{e}^{-}\to {\ell }^{-}{\ell }^{-}$, and then similar reactions $e^{-}{e}^{-}\to {\ell }^{-}{e}^{-}$ ($\ell =\mu ,\tau$) in supersymmetric models where LFV is due to slepton mixing.

Comments: 5 pages, talk presented by M. Cannoni at LCWS04, International Conference on Linear Collider, 19-23 Aprile 2004, Paris, France, to appear in the proceedings