Search for the pair production of light top squarks in the e[superscript ±]μ[superscript ∓] final state in proton-proton collisions at s√=13 TeV
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Sirunyan2019_Article_SearchForThePairProductionOfLi.pdf
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Author(s)
Abercrombie, Daniel Robert
Allen, Brandon Leigh
Azzolini, Virginia
Baty, Austin Alan
Bi, Ran
Brandt, Stephanie Akemi
Busza, Wit
Cali, Ivan Amos
D'Alfonso, Mariarosaria
Demiragli, Zeynep
Date Issued
March 2019
Journal
Journal of High Energy Physics
Publisher
Springer
Citation
Sirunyan, A.M. et al. "Search for the pair production of light top squarks in the e[superscript ±]μ[superscript ∓] final state in proton-proton collisions at s√=13 TeV." Journal of High Energy Physics (2019) 2019: 101 © 2019 The Author(s)
Version
Final published version
Abstract
A search for the production of a pair of top squarks at the LHC is presented. This search targets a region of parameter space where the kinematics of top squark pair production and top quark pair production are very similar, because of the mass difference between the top squark and the neutralino being close to the top quark mass. The search is performed with 35.9 fb⁻¹ of proton-proton collisions at a centre-of-mass energy of √s = 13 TeV, collected by the CMS detector in 2016, using events containing one electron-muon pair with opposite charge. The search is based on a precise estimate of the top quark pair background, and the use of the MT2 variable, which combines the transverse mass of each lepton and the missing transverse momentum. No excess of events is found over the standard model predictions. Exclusion limits are placed at 95% confidence level on the production of top squarks up to masses of 208 GeV for models with a mass difference between the top squark and the lightest neutralino close to that of the top quark. Keywords: Hadron-Hadron scattering (experiments); Supersymmetry; top squark
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1007/JHEP03(2019)101
