Compact Muon Solenoid
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| CMS-PAS-SUS-19-011 | ||
| Search for top squark pair production in the dilepton final state using 137 fb$^{-1}$ of proton-proton collision integrated luminosity at $\sqrt{s} =$ 13 TeV | ||
| CMS Collaboration | ||
| May 2020 | ||
| Abstract: A search for supersymmetric partners of the top quark is presented in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from b quarks, and missing transverse momentum. The search uses data from proton-proton collisions at $\sqrt{s}= $ 13 TeV collected from 2016 to 2018 using the CMS detector, amounting to 137 fb$^{-1}$ of integrated luminosity. Hypothetical signal events are efficiently separated from the dominant top-quark pair background with requirements on the significance of missing transverse momentum and transverse mass variables. No significant deviation is observed from the expected background. Exclusion limits are set in the context of simplified supersymmetric models with pair-produced top squarks. For top squarks decaying exclusively to a top quark and a neutralino, exclusion limits are placed at 95% confidence level on the mass of the lightest top squark up to 925 GeV and on the lightest neutralino up to 450 GeV. If the decay proceeds via an intermediate chargino, the exclusion limit at 95% confidence level of the lightest top squark reaches up to 850 GeV for neutralino masses below 420 GeV. For top squarks undergoing a cascade decay through charginos and sleptons, the mass limits reach up to 1.4 TeV for the top squark and up to 900 GeV for the lightest neutralino. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, EPJC 81 (2021) 3. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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