Search for invisible particles produced in association with single-top-quarks in proton–proton collisions at √s = 8 TeV with the ATLAS detector
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Collaboration-2015-Search for invisible.pdf
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1.19 MB
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Author(s)
Taylor, Frank E.
Date Issued
February 2015
Journal
The European Physical Journal C
Publisher
Springer-Verlag
Citation
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Search for Invisible Particles Produced in Association with Single-Top-Quarks in Proton–proton Collisions at √s = 8 TeV with the ATLAS Detector.” Eur. Phys. J. C 75, no. 2 (February 2015). © 2015 CERN for the benefit of the ATLAS collaboration
Version
Final published version
Abstract
A search for the production of single-top-quarks in association with missing energy is performed in proton–proton collisions at a centre-of-mass energy of √s = 8 TeV with the ATLAS experiment at the large hadron collider using data collected in 2012, corresponding to an integrated luminosity of 20.3 fb[superscript −1]. In this search, the W boson from the top quark is required to decay into an electron or a muon and a neutrino. No deviation from the standard model prediction is observed, and upper limits are set on the production cross-section for resonant and non-resonant production of an invisible exotic state in association with a right-handed top quark. In the case of resonant production, for a spin- 0 resonance with a mass of 500 GeV, an effective coupling strength above 0.15 is excluded at 95% confidence level for the top quark and an invisible spin-1/2 state with mass between 0 and 100 GeV. In the case of non-resonant production, an effective coupling strength above 0.2 is excluded at 95% confidence level for the top quark and an invisible spin-1 state with mass between 0 and 657 GeV.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1140/epjc/s10052-014-3233-4
