Dresden 2013 – scientific programme
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T: Fachverband Teilchenphysik
T 54: Supersymmetrie 5
T 54.7: Talk
Thursday, March 7, 2013, 18:20–18:35, GER-038
Light Higgsino Precision Measurements at the International Linear Collider — Mikael Berggren1, Jenny List1, and •Hale Sert1,2 — 1DESY, Notkestraβe 85, 22607 Hamburg, Germany — 2Hamburg University, 20146 Hamburg, Germany
In this talk, a study based on a hybrid gauge-gravity mediated supersymmetry breaking model, which can give Higgs mass around 125 GeV, will be presented. This model has three light, almost mass degenerate Higgsinos, with mass splittings of a few GeV or even less than a GeV, and apart from them all other Supersymmetry(SUSY) particles are very heavy up to the multi-TeV regime. We have studied two different signal processes containing the Higgsinos, e+ e− → χ1+ χ1− γ and e+ e− → χ20 χ10 γ. We have required the hard ISR photon to get rid of similarity of the final states with the γ γ → ff background. To separate the charged and neutral higgsinos, different decay modes can be used. The detailed information about how to measure the masses of the Higgsinos and cross sections at the International Linear Collider (ILC) will be explained and preliminary results will be presented. Furthermore, the prospects for SUSY parameter determination will be discussed.