Search for dark matter produced in association with a single top quark in <i>√s</i>=13 TeV <i>pp</i> collisions with the ATLAS detector

ATLAS Collaboration

doi:10.1140/epjc/s10052-021-09566-y

Scientific article

English

Search for dark matter produced in association with a single top quark in √s=13 TeV pp collisions with the ATLAS detector

Contributors

ATLAS Collaboration

Published in

European physical journal. C, Particles and fields, vol. 81, no. 10, 860

Publication date

2021

First online date

2021-10-01

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 Run 2 (2015–2018), corresponding to an integrated luminosity of 139 $\hbox {fb}^{-1}$. 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

P p: scattering
P p: colliding beams
Transverse momentum: missing-energy
Top: single production
Dark matter: associated production
Higgs particle: doublet
CERN LHC Coll
Pseudoscalar
Mediation
ATLAS
Electron
Final state: ((n)jet lepton)
Final state: ((n)jet dilepton)
Muon
Statistical analysis
Channel cross section: upper limit
Experimental results
13000 GeV-cms
S055H2O

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

ATLAS Collaboration. Search for dark matter produced in association with a single top quark in √s=13 TeV pp collisions with the ATLAS detector. In: European physical journal. C, Particles and fields, 2021, vol. 81, n° 10, p. 860. doi: 10.1140/epjc/s10052-021-09566-y

Article (Published version)

CC BY-4.0

Identifiers

PID : unige:178331
DOI : 10.1140/epjc/s10052-021-09566-y
arXiv : 2011.09308

Additional URL for this publication

https://link.springer.com/10.1140/epjc/s10052-021-09566-y

Journal ISSN

1434-6044

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24/06/2024 08:01:29

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01/07/2024 09:07:32

Update

13/10/2025 13:39:42

Status update