Aaboud, M;
Aad, G;
Abbott, B;
Abdinov, O;
Abeloos, B;
Abidi, SH;
AbouZeid, OS;
... Zwalinski, L; + view all
(2018)
Search for dark matter produced in association with bottom or top quarks in root s=13 TeV pp collisions with the ATLAS detector.
European Physical Journal C
, 78
(1)
, Article 18. 10.1140/epjc/s10052-017-5486-1.
Preview |
Text
10.1140_epjc_s10052-017-5486-1.pdf - Published Version Download (2MB) | Preview |
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−136.1fb−1 of proton–proton collision data recorded by the ATLAS experiment at s√=13s=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 50GeV50GeV and assuming a dark-matter mass of 1GeV1GeV and unitary coupling. Constraints on colour-charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35GeV35GeV , mediator particles with mass below 1.1TeV1.1TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements.
| Type: | Article |
|---|---|
| Title: | Search for dark matter produced in association with bottom or top quarks in root s=13 TeV pp collisions with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1140/epjc/s10052-017-5486-1 |
| Publisher version: | http://dx.doi.org/10.1140/epjc/s10052-017-5486-1 |
| Language: | English |
| Additional information: | Copyright © CERN for the benefit of the ATLAS collaboration 2018. Open Access: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10042060 |
Archive Staff Only
 |
View Item |
