Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/3674
 Title: Search for dark matter produced in association with bottom or top quarks in ?s=13 TeV pp collisions with the ATLAS detector Authors: The ATLAS CollaborationSultansoy, Saleh Keywords: Collisions jets proton–proton collisions Issue Date: Jan-2018 Publisher: Springer New York LLC Source: ATLAS collaboration. (2018). Search for dark matter produced in association with bottom or top quarks in $$\sqrt {s}= 13$$ TeV pp collisions with the ATLAS detector. The European Physical Journal C, 78(1), 18. Abstract: A search for weakly interacting massive dark-matter particles produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and missing transverse momentum are considered. The analysis uses 36.1fb-1 of proton–proton collision data recorded by the ATLAS experiment at s=13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are interpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour-neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross-section of 300 times the predicted rate for mediators with masses between 10 and 50GeV and assuming a dark-matter mass of 1GeV and unitary coupling. Constraints on colour-charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35GeV, mediator particles with mass below 1.1TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements. © 2018, CERN for the benefit of the ATLAS collaboration. URI: https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-017-5486-1https://hdl.handle.net/20.500.11851/3674 ISSN: 14346044 Appears in Collections: Malzeme Bilimi ve Nanoteknoloji Mühendisliği Bölümü / Department of Material Science & Nanotechnology EngineeringPubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications CollectionScopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications CollectionWoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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