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https://hdl.handle.net/2440/114922
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Type: | Journal article |
Title: | Search for dark matter produced in association with bottom or top quarks in √s=13 TeV pp collisions with the ATLAS detector |
Other Titles: | Search for dark matter produced in association with bottom or top quarks in root s=13 TeV pp collisions with the ATLAS detector |
Author: | Aaboud, M. Aad, G. Abbott, B. Abdinov, O. Abeloos, B. Abidi, S. AbouZeid, O. Abraham, N. Abramowicz, H. Abreu, H. Abreu, R. Abulaiti, Y. Acharya, B. Adachi, S. Adamczyk, L. Adelman, J. Adersberger, M. Adye, T. Affolder, A. Afik, Y. et al. |
Citation: | European Physical Journal C: Particles and Fields, 2018; 78(1):18-1-18-36 |
Publisher: | Springer |
Issue Date: | 2018 |
ISSN: | 1434-6044 1434-6052 |
Statement of Responsibility: | G. Aad … Damir Duvnjak … Paul D. Jackson … Andreas Petridis … Martin White … et al. (ATLAS Collaboration) |
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. |
Keywords: | ATLAS Collaboration |
Rights: | © CERN for the benefit of the ATLAS collaboration 2018. 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. |
DOI: | 10.1140/epjc/s10052-017-5486-1 |
Published version: | http://dx.doi.org/10.1140/epjc/s10052-017-5486-1 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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hdl_114922.pdf | Published version | 1.46 MB | Adobe PDF | View/Open |
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