Search for dark matter produced in association with a single top quark in √s=13 TeV pp collisions with the ATLAS detector
Authors
Abbott, DC
Abraham, NL
Camelia, EA
Amelung, C
Amrouche, CS
Andrei, V
Anelli, CR
Pozo, JAA
Pereira, RA
Publication Date
2021Journal Title
European Physical Journal C
ISSN
1434-6044
Publisher
Springer Science and Business Media LLC
Volume
81
Issue
10
Language
en
Type
Article
This Version
VoR
Metadata
Show full item recordCitation
Aad, G., Abbott, B., Abbott, D., Abud, A., Abeling, K., Abhayasinghe, D., Abidi, S., et al. (2021). Search for dark matter produced in association with a single top quark in √s=13 TeV pp collisions with the ATLAS detector. European Physical Journal C, 81 (10) https://doi.org/10.1140/epjc/s10052-021-09566-y
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
$\sqrt{s} = 13$ TeV during LHC Run2 (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.
Keywords
hep-ex, hep-ex
Identifiers
s10052-021-09566-y, 9566
External DOI: https://doi.org/10.1140/epjc/s10052-021-09566-y
This record's URL: https://www.repository.cam.ac.uk/handle/1810/331713
Rights
Licence:
http://creativecommons.org/licenses/by/4.0/
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