CMS-PAS-SUS-23-001

CMS-PAS-SUS-23-001
Search for top squarks in final states with many light flavor jets and 0, 1, or 2 leptons in proton-proton collisions at $ \sqrt{s}= $ 13 TeV
CMS Collaboration
6 June 2024

Abstract: Several new physics models including versions of supersymmetry (SUSY) characterized by $ R $-parity violation (RPV) or with additional hidden sectors predict the production of events with top quarks, low missing transverse momentum, and many additional quarks or gluons. The results of a search for top squarks decaying to two top quarks and six additional light-flavor quarks or gluons are reported. The search employs a novel machine learning method for data-driven background estimation using decorrelated discriminators referred to as the ABCDisCoTEC technique. The search is performed using events with 0, 1, or 2 electrons or muons in conjunction with at least six jets. No requirement is placed on the presence of missing transverse momentum. The result is based on a sample of proton-proton collisions at $ \sqrt{s} = $ 13 TeV corresponding to 138 fb$ ^{-1} $ of integrated luminosity collected with the CMS detector at the LHC in 2016-2018. The data are used to determine upper limits on the top squark pair production cross section in the frameworks of RPV and stealth SUSY. Models with top squark masses less than 700 (920) GeV are excluded at the 95% confidence level for RPV (stealth) SUSY scenarios.
Links: CDS record (PDF) ; Physics Briefing ; CADI line (restricted) ; These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here.

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