Collaboration, ATLAS;
(2017)
Search for direct top squark pair production in final states with
two leptons in √s = 13 TeV pp collisions with the ATLAS detector.
The European Physical Journal C
, 77
, Article 898. 10.1140/epjc/s10052-017-5445-x.
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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−136.1 fb−1 of integrated luminosity from proton–proton collisions at s√=13s=13 TeV collected by the ATLAS detector at the Large Hadron Collider. To cover a range of mass differences between the top squark t~t~ and lighter supersymmetric particles, four possible decay modes of the top squark are targeted with dedicated selections: the decay t~→bχ~±1t~→bχ~1± into a b-quark and the lightest chargino with χ~±1→Wχ~01χ~1±→Wχ~10 , the decay t~→tχ~01t~→tχ~10 into an on-shell top quark and the lightest neutralino, the three-body decay t~→bWχ~01t~→bWχ~10 and the four-body decay t~→bℓνχ~01t~→bℓνχ~10 . 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~t~ and χ~01χ~10 masses. The results exclude at 95% confidence level t~t~ masses up to about 720 GeV, extending the exclusion region of supersymmetric parameter space covered by previous searches.
| Type: | 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 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1140/epjc/s10052-017-5445-x |
| Publisher version: | http://dx.doi.org/10.1140/epjc/s10052-017-5445-x |
| Language: | English |
| Additional information: | © CERN for the benefit of the ATLAS collaboration 2017. 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. |
| Keywords: | hep-ex, hep-ex |
| 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/1576070 |
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