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T: Fachverband Teilchenphysik

T 103: Suche nach Supersymmetrie 5

T 103.2: Vortrag

Donnerstag, 30. März 2017, 17:00–17:15, JUR 498

Search for supersymmetry in dileptonic final states with jets with the JZB method at CMS using Run II data — •Marius Teroerde, Lutz Feld, and Christian Schomakers — 1. Physikalisches Institut B, RWTH Aachen University

Supersymmetry (SUSY) is a popular extension of the standard model of particle physics, as it would solve a variety of problems in particle physics. In the model considered in the presented analysis, a possible final state contains jets as well as the stable lightest supersymmetric particle (LSP), which is produced together with a leptonically decaying Z boson. Thus, the signal is characterized by two same-flavor opposite-sign leptons, missing transverse energy (MET) and the presence of two or more jets. An important background for this search is the Drell-Yan process with additional jets, as it has a similar event topology. In contrast to SUSY events, Drell-Yan events only contain instrumental MET. Therefore, the variable "jet-Z balance" (JZB), which takes the transverse momentum of the Z boson and the hadronic recoil into account, is distributed differently for Drell-Yan and SUSY events. This allows the definition of a signal depleted control region which is used to predict the Drell-Yan background. The JZB method was successfully used in several analyses at √s = 7−8  TeV.

This talk shows the application of the method on data taken in 2015 and 2016 in two separate searches for supersymmetry.