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

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

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 languageEnglish
Article number860
Pages (from-to)1-37
Number of pages37
JournalThe European Physical Journal C
Volume81
DOIs
Publication statusPublished - 1 Oct 2021

Fingerprint

Dive into the research topics of 'Search for dark matter produced in association with a single top quark in √s = 13 TeV pp collisions with the ATLAS detector'. Together they form a unique fingerprint.

Cite this