arXiv subjects

Thomas Kernreiter

Publications and source records attributed to Thomas Kernreiter.

2 recordsLinked to original sources

arXiv2007

Lepton Flavour Violating Effects on Chargino Production at the ILC

We review the influence of lepton flavour violation (LFV) on the production processes e+e- -> ~chi+_i ~chi-_j at the International Linear Collider (ILC) with longitudinal e+ and e- beam polarizations in the framework of the Minimal Supersymmetric Standard Model (MSSM). The t-channel sneutrino exchange contribution to the processes e+e- -> ~chi+_i ~chi-_j is modified in the case of LFV, as the sneutrino mass eigenstates have no definite flavour, and therefore more than one sneutrino can contribute. This influence can alter the cross section sigma(e+e- -> ~chi+_1 ~chi-_1) by a factor of 2 or more when varying the LFV mixing angles, in accordance with the restrictions due to the current limits on rare lepton decays. Hence, the inclusion of LFV parameters can be important when deducing the underlying model parameters from measured observables such as sigma(e+e- -> ~chi+_1 ~chi-_1).

hep-ph↗

arXiv2007

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

We study the effects of lepton flavour violation (LFV) on the production processes e+e- --> χ+_i χ-_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 σ(e+e- --> χ+_1 χ-_1) can change by a factor of 2 or more when varying the LFV mixing angles. We point out that even if the present bound on BR(tau- --> e- gamma) improves by a factor of thousand the influence of LFV on the chargino production cross section can be significant. These results could have an important impact on the strategies for determining the underlying model parameters at the linear collider.

hep-ph↗