Münster 2017 – wissenschaftliches Programm
T 103.4: Vortrag
Donnerstag, 30. März 2017, 17:30–17:45, JUR 498
Data-driven background estimates in searches for supersymmetry in final states with two same-sign leptons or three leptons, jets and ETmiss with the ATLAS detector — •Peter Tornambè and Fabio Cardillo — Albert-Ludwigs Universitat Freiburg
A search for supersymmetric phenomena in final states with two leptons with the same electric charge or three leptons, jets and missing transverse energy ETmiss is presented. The production of same-sign lepton pairs or three leptons is only induced by rare Standard Model processes with very small cross-sections. The search thus profits from little background and has a good exclusion potential in compressed SUSY spectra and in scenarios where the R-parity is violated, and no stable SUSY particles are produced. Except from the prompt production of same-sign lepton pairs, the main sources for SM processes contaminating the signal regions are fake-leptons and leptons with a charge mis-identification. While background originating from prompt same-sign lepton sources is estimated with simulated Monte Carlo events, the non-prompt sources are addressed with data-driven techniques. Within this talk, the current analysis strategy in Run-II will be presented focusing on the methods used for the background estimation and sensitivity optimisation. But also the latest results obtained during the 2015 and 2016 data-taking will be shown.