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Type: Journal article
Title: Search for direct top squark pair production in final states with two leptons in √s = 13 TeV pp collisions with the ATLAS detector
Other Titles: Search for direct top squark pair production in final states with two leptons 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, 2017; 77(12):898-1-898-41
Publisher: Springer
Issue Date: 2017
ISSN: 1434-6044
Statement of
M. Aaboud ... D. Duvnjak ... P. Jackson ... L. Lee ... P. Petridis ... M.J. White ... [et al.] (The ATLAS Collaboration)
Abstract: The results of a search for direct pair production of top squarks in events with two opposite-charge leptons (electrons or muons) are reported, using 36.1 fb−1 of integrated luminosity from proton–proton collisions at s√=13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark t~ and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay t~→bχ~±1 into a b-quark and the lightest chargino with χ~±1→Wχ~01, the decay t~→tχ~01 into an on-shell top quark and the lightest neutralino, the three-body decay t~→bWχ~01 and the four-body decay t~→bℓνχ~01. No significant excess of events is observed above the Standard Model background for any selection, and limits on top squarks are set as a function of the t~ and χ~01 masses. The results exclude at 95% confidence level t~ masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches.
Keywords: ATLAS Collaboration
Rights: © CERN for the benefit of the ATLAS collaboration 2017. This article is an open access publication
DOI: 10.1140/epjc/s10052-017-5445-x
Grant ID: ARC
Published version:
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