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Search for dark matter produced in association with a single top quark in √s=13 TeV pp collisions with the ATLAS detector
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SYSNO ASEP 0551958 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Search for dark matter produced in association with a single top quark in √s=13 TeV pp collisions with the ATLAS detector Author(s) Aad, G. (FR)
Abbott, B. (US)
Abbott, D.C. (US)
Chudoba, Jiří (FZU-D) RID, ORCID
Hejbal, Jiří (FZU-D) RID, ORCID
Hladík, Ondřej (FZU-D) ORCID
Jačka, Petr (FZU-D) ORCID
Kepka, Oldřich (FZU-D) RID, ORCID
Kroll, Jiří (FZU-D) ORCID
Kupčo, Alexander (FZU-D) RID, ORCID
Latoňová, Věra (FZU-D) ORCID
Lokajíček, Miloš (FZU-D) RID, ORCID
Lysák, Roman (FZU-D) RID, ORCID
Marčišovský, Michal (FZU-D) RID, ORCID
Mikeštíková, Marcela (FZU-D) RID, ORCID
Němeček, Stanislav (FZU-D) RID, ORCID
Penc, Ondřej (FZU-D) ORCID
Šícho, Petr (FZU-D) RID, ORCID
Staroba, Pavel (FZU-D) RID, ORCID
Svatoš, Michal (FZU-D) RID, ORCID
Taševský, Marek (FZU-D) RID, ORCIDNumber of authors 2935 Article number 860 Source Title European Physical Journal C. - : Springer - ISSN 1434-6044
Roč. 81, č. 10 (2021)Number of pages 37 s. Language eng - English Country DE - Germany Keywords ATLAS ; CERN LHC Coll ; pseudoscalar ; mediation Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LTT17018 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Research Infrastructure CERN-CZ II - 90104 - Fyzikální ústav AV ČR, v. v. i. Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000702719500002 EID SCOPUS 85116501953 DOI 10.1140/epjc/s10052-021-09566-y Annotation This paper presents a search for dark matter in the context of a two-Higgs-doublet model together with an additional pseudoscalar mediator, aaa, which decays into the dark-matter particles. Processes where the pseudoscalar mediator is produced in association with a single top quark in the 2HDM+aaa model are explored for the first time at the LHC. Several final states which include either one or two charged leptons (electrons or muons) and a significant amount of missing transverse momentum are considered. The analysis is based on proton-proton collision data collected with the ATLAS experiment at s=13sqrt{s} = 13s =13 TeV during LHC Run2 (2015-2018), corresponding to an integrated luminosity of 139 fb−1^{-1}−1. No significant excess above the Standard Model predictions is found. The results are expressed as 95% confidence-level limits on the parameters of the signal models considered. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0327156
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