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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

Aad G.
•
Abbott B.
•
Abbott D. C.
altro
Zwalinski L.
2021
  • journal article

Periodico
THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Abstract
This paper presents a search for dark matter in the context of a two-Higgs-doublet model together with an additional pseudoscalar mediator, a, which decays into the dark-matter particles. Processes where the pseudoscalar mediator is produced in association with a single top quark in the 2HDM+a 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=13 TeV during LHC Run 2 (2015–2018), corresponding to an integrated luminosity of 139 fb - 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.
DOI
10.1140/epjc/s10052-021-09566-y
WOS
WOS:000702719500002
Archivio
http://hdl.handle.net/11390/1212824
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85116501953
https://ricerca.unityfvg.it/handle/11390/1212824
Diritti
open access
google-scholar
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