Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 28: Suche nach dunkler Materie II

T 28.8: Vortrag

Dienstag, 20. März 2018, 18:20–18:35, Philo-HS5

Search for Dark Matter produced in association with a W or Z boson with the ATLAS Experiment at 13 TeV — •Stanislav Suchek and Oleg Brandt — Kirchhoff-Institut für Physik, Universität Heidelberg

Dark Matter composes a significant part of the visible Universe. Despite a solid cosmological evidence, its nature, properties and interaction with the Standard Model sector is still to be unraveled. Looking for the direct production of Dark Matter particles at particle colliders can shed light on the mystery of Dark Matter.
The signature of this search is a pair of quarks coming from the decays of the Standard Model W and Z bosons, recoiling against missing transverse momentum from Dark Matter particles. In addition to small-R jets, large-R jets are used to identify highly boosted W and Z bosons. The results using 36 fb⁻¹ of 2015+2016 ATLAS pp collision data are presented. In case of no significant excess, limits on s-channel vector mediator models, as well as limits with reduced model dependence at 95% confidence level on the visible cross-section of W/Z + Dark Matter production, will be presented for different missing transverse energy regions.