July 25, 2007 to August 1, 2007
Karlsruhe University
Europe/Zurich timezone

Effects of Lepton Flavour Violation on Chargino Production at the Linear Collider

Jul 30, 2007, 2:20 PM
Gaede-Auditorium (Karlsruhe University)


Karlsruhe University

Wolfgang-Gaede-Str. 1 76131 Karlsruhe Germany
Parallel Talk Colliders - Susy Phenomenology Colliders - Susy Phenomenology 7 (Theory)


Dr Thomas Kernreiter (University of Vienna)


We study the effects of lepton flavour violation (LFV) on the production processes $e^+e^-\to\tilde\chi^+_i\tilde\chi^-_j$ at a linear collider with longitudinal $e^+$ and $e^-$ beam polarizations. In the case of LFV the sneutrino mass eigenstates have no definite flavour, therefore, in the $t-$channel more than one sneutrino mass eigenstate can contribute to the chargino production cross sections. Our framework is the Minimal Supersymmetric Standard Model (MSSM) including LFV terms. We show that in spite of the restrictions on the LFV parameters due to the current limits on rare lepton decays, the cross section $\sigma(e^+e^-\to\tilde\chi^+_1\tilde\chi^-_1)$ can change up to one order of magnitude by the influence of LFV. We point out that this can be the case even if the present bound on BR($\tau^-\to e^-\gamma$) improves by a factor of thousand. Our results could have an important impact on the strategies for determining the underlying model parameters at the linear collider.

Primary author

Dr Karl Hohenwarter-Sodek (University of Vienna)


Dr Thomas Kernreiter (University of Vienna)

Presentation materials