Search for dark matter produced in association with bottom or top quarks in root s=13 TeV pp collisions with the ATLAS detector

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dc.WoS.categoriesPhysics, Particles & Fieldsen_US
dc.authorid0000-0001-5050-8441en_US
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2020-12-09T08:54:36Z
dc.date.available2020-12-09T08:54:36Z
dc.date.issued2018-01-11
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümüen_US
dc.description.abstractA 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 36.1 fb(-1) of proton proton collision data recorded by the ATLAS experiment at root 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 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour-charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements.en_US
dc.fullTextLevelFull Texten_US
dc.identifier.doi10.1140/epjc/s10052-017-5486-1
dc.identifier.issn1434-6052
dc.identifier.issn1434-6044
dc.identifier.pmid31265005en_US
dc.identifier.scopus2-s2.0-85040740833en_US
dc.identifier.urihttps://hdl.handle.net/11411/2809
dc.identifier.urihttps://doi.org/10.1140/epjc/s10052-017-5486-1
dc.identifier.wosWOS:000422660200005en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.issue1en_US
dc.language.isoenen_US
dc.nationalInternationalen_US
dc.numberofauthors200+en_US
dc.publisherSPRINGERen_US
dc.relation.ispartofEUROPEAN PHYSICAL JOURNAL Cen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPRODUCTION CROSS-SECTIONen_US
dc.subjectPAIR PRODUCTIONen_US
dc.subjectPARTON DISTRIBUTIONSen_US
dc.subjectHADRON COLLIDERSen_US
dc.subjectMEASURING MASSESen_US
dc.subjectLHCen_US
dc.titleSearch for dark matter produced in association with bottom or top quarks in root s=13 TeV pp collisions with the ATLAS detector
dc.typeArticle
dc.volume78en_US

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