Aaboud2018_Article_SearchForDarkMatterProducedInA.pdf (2.07 MB)
Search for dark matter produced in association with bottom or top quarks in vs = 13 TeV pp collisions with the ATLAS detector
Version 2 2023-06-12, 08:47
Version 1 2023-06-09, 09:27
journal contribution
posted on 2023-06-12, 08:47 authored by Fabrizio SalvatoreFabrizio Salvatore, Antonella De SantoAntonella De Santo, Iacopo Vivarelli, Alessandro CerriAlessandro Cerri, Lily AsquithLily Asquith, Benedict AllbrookeBenedict Allbrooke, Kerim Suruliz, Mark SuttonMark Sutton, Carlos Chavez Barajas, The ATLAS CollaborationA search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb-1 of proton–proton collision data recorded by the ATLAS experiment at vs = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted 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 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements.
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Publication status
- Published
File Version
- Published version
Journal
European Physical Journal C: Particles and FieldsISSN
1434-6044Publisher
Springer VerlagExternal DOI
Issue
1Volume
78Page range
1-36Article number
a18Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Experimental Particle Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-12-19First Open Access (FOA) Date
2017-12-19First Compliant Deposit (FCD) Date
2017-12-19Usage metrics
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