Mainz 2014 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
T: Fachverband Teilchenphysik
T 38: Interpretation von SUSY Suchen (Theorie/Experiment)
T 38.8: Talk
Monday, March 24, 2014, 18:35–18:50, P104
Light Higgsino Precision Measurements at the International Linear Collider — Mikael Berggren1, Felix Brümmer1, Jenny List1, Gudrid Moortgat-Pick2, Tania Robens3, Krzysztof Rolbiecki4, and •Hale Sert1,2 — 1DESY, Notkestraße 85, 22607 Hamburg, Germany — 2Physics Department, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 3IKTP, TU Dresden, Zellescher Weg 19, 01069 Dresden, Germany — 4IFT-UAM/CSIC, C/Nicolás Cabrera 13-15, 28049 Madrid, Spain
In this talk, a study based on Natural SUSY will be presented. Key predictions of Natural SUSY are three light, almost mass degenerate higgsinos, with mass splittings of a few GeV or even less. The main goal of this study is to estimate the achievable precision on the higgsino masses, mass differences and cross sections at the International Linear Collider. For this, we assume a particularly challenging scenario in which all other SUSY particles apart from the higgsinos are very heavy up to the multi-TeV regime. The higgsinos can be produced via e+ e− → χ1+ χ1− γ and e+ e− → χ20 χ10 γ, where the photon is required to suppress the Standard Model backgrounds. They decay according to χ1± → χ10 W*±, χ20 → χ10 Z*0 and χ20 → χ10 γ , where we chose exclusive decay modes to separate the charged and neutral higgsinos. We present an analysis based on fast simulation of ILD detector concept and show that the relevant SUSY parameters can be determined from the measured observables.