Search for dark matter produced in association with bottom or top quarks in √s=13 TeV pp collisions with the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

A search for weakly interacting massive dark-matter particles produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and missing transverse momentum are considered. The analysis uses 36.1fb-1 of proton–proton collision data recorded by the ATLAS experiment at s=13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are interpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour-neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross-section of 300 times the predicted rate for mediators with masses between 10 and 50GeV and assuming a dark-matter mass of 1GeV and unitary coupling. Constraints on colour-charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35GeV, mediator particles with mass below 1.1TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements.

Original languageEnglish
Article number18
JournalEuropean Physical Journal C
Volume78
Issue number1
DOIs
StatePublished - 1 Jan 2018

Funding

FundersFunder number
Not addedST/N000447/1, ST/N000420/1
AvH Foundation
Benoziyo Center, Israel
CEA-DSM/IRFU
COLCIEN-CIAS
Canada Council
Cantons of Bern and Geneva
DNSRCIN2P3-CNRS
DST/NRF
EU-ESF
MES of Russia
MESTD
MIZŠ
MNE/IFA
MSMT
MSSR
Minerva, Israel
RGC
Région Auvergne
VSC CR
Wal-lenberg Foundation
National Science Foundation1624739
National Science Foundation
U.S. Department of Energy
Ontario Innovation Trust
Canarie
H2020 Marie Skłodowska-Curie Actions
Biomedical Research Foundation
Arizona-Nevada Academy of Science
CERN
Compute Canada
National Research Council
College of Arts and Sciences, University of Nebraska-Lincoln
Glycemic Index Foundation
Natural Sciences and Engineering Research Council of Canada
Science and Technology Facilities CouncilST/G502304/1, PP/E000347/1, PP/E002730/1, ST/I000143/1, ST/I005846/1, ST/M503423/1, ST/K001361/1, ST/N000331/1, ST/K003666/1, GRIDPP, ST/L005662/1, PP/E000452/1, ST/J00488X/1, ST/M006417/1, ST/H001158/1, ST/L001144/1, 1659192, ST/N000307/1, ST/H001093/2, ST/M001431/1, ST/H001158/2, ST/H001093/1, ST/J005606/1, ST/L006162/1, ST/N000404/1, 1653101, ST/N000234/1, ST/N000277/1, 1668509
Science and Technology Facilities Council
Leverhulme Trust
Royal Society
British Skin Foundation
European Research Council
Australian Research Council
Capital Markets CRC Limited
Singapore Eye Research Institute
Helmholtz-Gemeinschaft
Deutsche Forschungsgemeinschaft
Agence Nationale de la Recherche
Japan Society for the Promotion of Science
Ministry of Education, Culture, Sports, Science and Technology
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Danmarks Grundforskningsfond
Canada Foundation for Innovation
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China
Fundação para a Ciência e a Tecnologia
Bundesministerium für Bildung und Forschung
Austrian Science Fund
Generalitat de Catalunya
Comisión Nacional de Investigación Científica y Tecnológica
Agencia Nacional de Promoción Científica y Tecnológica
Fonds Québécois de la Recherche sur la Nature et les Technologies
Ministerstvo Zdravotnictví Ceské Republiky
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Ministerio de Economía y Competitividad
Generalitat Valenciana
Bundesministerium für Wissenschaft, Forschung und Wirtschaft
General Secretariat for Research and Technology
Conselho Nacional de Desenvolvimento Científico e Tecnológico
Ministry of Science and Technology
Joint Institute for Nuclear Research
Israel Science Foundation
Instituto Nazionale di Fisica Nucleare
Narodowe Centrum Nauki
Javna Agencija za Raziskovalno Dejavnost RS
Ministerstwo Nauki i Szkolnictwa Wyższego
Shota Rustaveli National Science Foundation
Israeli Centers for Research Excellence
Centre National pour la Recherche Scientifique et Technique
Horizon 2020
British Columbia Knowledge Development Fund
European Regional Development Fund
Fondation Partager le Savoir
National Research Center "Kurchatov Institute"
Ministry of Health of the Russian Federation

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