# Effects of Lepton Flavour Violation on Chargino Production at the Linear Collider - High Energy Physics - Phenomenology

Abstract: We study the effects of lepton flavour violation LFV on the productionprocesses e+e-> \chi+ i \chi- j at a linear collider with longitudinal e+and e- beam polarizations. In the case of LFV the sneutrino mass eigenstateshave no definite flavour, therefore, in the t-channel more than one sneutrinomass eigenstate can contribute to the chargino production cross sections. Ourframework is the Minimal Supersymmetric Standard Model MSSM including LFVterms. We show that in spite of the restrictions on the LFV parameters due tothe current limits on rare lepton decays, the cross section \sigmae+e->\chi+ 1 \chi- 1 can change by a factor of 2 or more when varying the LFVmixing angles. We point out that even if the present bound on BRtau-> e-gamma improves by a factor of thousand the influence of LFV on the charginoproduction cross section can be significant. These results could have animportant impact on the strategies for determining the underlying modelparameters at the linear collider.

Author: Karl Hohenwarter-Sodek, Thomas Kernreiter

Source: https://arxiv.org/