Aachen 2019 – scientific programme
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T: Fachverband Teilchenphysik
T 79: Dunkle Materie und Kollider II
T 79.9: Talk
Thursday, March 28, 2019, 18:00–18:15, H09
Dark Matter search in association with top quark pair production — •Nicole Stefanov1,2, Alexander Grohsjean2, Gerrit Van Onsem2, Afiq Aizuddin Anuar1,2, and Christian Schwanenberger1,2 — 1Universität Hamburg, Hamburg, Deutschland — 2DESY, Hamburg, Deutschland
The existence of dark matter (DM) hints to the incompleteness of the standard model (SM). Some models feature an enhanced coupling of DM to heavier SM particles, making searches for its associated production with such particles especially attractive. In this talk a search for DM in association with top quark pair production at the CMS experiment will be presented. Particular attention is given to the kinematic reconstruction of events containing dileptonically decaying top quark pairs. The performance of the correct matching of the b-jets with leptons as well as of the reconstruction of the transverse momentum of the DM mediator will be discussed.