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

ATLAS Publications; T.M. Carter; M. Faucci Giannelli; A. Hasib; M.P. Heath; S. Palazzo; A. Søgaard; E.P. Takeva; A.J. Taylor; N. Themistokleous; E.M. Villhauer

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

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

ATLAS Publications, T.M. Carter, M. Faucci Giannelli, A. Hasib, M.P. Heath, S. Palazzo, A. Søgaard, E.P. Takeva, A.J. Taylor, N. Themistokleous, E.M. Villhauer

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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 lumi-
nosity 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.

Original language	English
Article number	860
Pages (from-to)	1-37
Number of pages	37
Journal	The European Physical Journal C
Volume	81
DOIs	https://doi.org/10.1140/epjc/s10052-021-09566-y
Publication status	Published - 1 Oct 2021

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10.1140/epjc/s10052-021-09566-yLicence: Creative Commons: Attribution (CC-BY)

http://arxiv.org/abs/2011.09308

3 Finished
3 Active

Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P.
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/04/23 → 30/09/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/10/22 → 30/09/25
Project: Research

Cite this

ATLAS Publications, Carter, T. M., Faucci Giannelli, M., Hasib, A., Heath, M. P., Palazzo, S., Søgaard, A., Takeva, E. P., Taylor, A. J., Themistokleous, N., & Villhauer, E. M. (2021). Search for dark matter produced in association with a single top quark in √s = 13 TeV pp collisions with the ATLAS detector. The European Physical Journal C, 81, 1-37. Article 860. https://doi.org/10.1140/epjc/s10052-021-09566-y

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

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 pseudoscalarmediator 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 significantamount 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 lumi-nosity 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.",

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ATLAS Publications, Carter, TM, Faucci Giannelli, M, Hasib, A, Heath, MP, Palazzo, S, Søgaard, A, Takeva, EP, Taylor, AJ, Themistokleous, N & Villhauer, EM 2021, 'Search for dark matter produced in association with a single top quark in √s = 13 TeV pp collisions with the ATLAS detector', The European Physical Journal C, vol. 81, 860, pp. 1-37. https://doi.org/10.1140/epjc/s10052-021-09566-y

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T1 - Search for dark matter produced in association with a single top quark in √s = 13 TeV pp collisions with the ATLAS detector

AU - ATLAS Publications

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Gao, Yanyan

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Carter, T.M.

AU - Faucci Giannelli, M.

AU - Hasib, A.

AU - Heath, M.P.

AU - Palazzo, S.

AU - Søgaard, A.

AU - Takeva, E.P.

AU - Taylor, A.J.

AU - Themistokleous, N.

AU - Villhauer, E.M.

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AB - 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 pseudoscalarmediator 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 significantamount 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 lumi-nosity 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.

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DO - 10.1140/epjc/s10052-021-09566-y

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SP - 1

EP - 37

JO - The European Physical Journal C

JF - The European Physical Journal C

M1 - 860

ER -

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

Abstract

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Projects

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Cite this