Compact Muon Solenoid
LHC, CERN
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| CMS-PAS-TOP-21-005 | ||
| Evidence for the simultaneous production of four top quarks in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| 20 September 2022 | ||
| Abstract: The production of four top quarks ($ \mathrm{t\bar{t}t\bar{t}} $) is studied in up to 138 fb$ ^{-1} $ of LHC proton-proton collision data at a center-of-mass energy of 13 TeV. Events that have zero, one, or two opposite-sign charged electrons or muons are considered. This is the first $ \mathrm{t\bar{t}t\bar{t}} $ result that includes the all-hadronic final state. The observed significance of the $ \mathrm{t\bar{t}t\bar{t}} $ signal in these final states is 3.7 standard deviations (1.5 expected). The measured cross section is 38 $ ^{+13}_{-11} $ fb. Combining this result with published CMS results in other final states, we obtain a significance of 3.9 standard deviations (3.2 expected), which corresponds to an observed cross section of 17 $ ^{+5}_{-5} $ fb. | ||
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Links:
CDS record (PDF) ;
Physics Briefing ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, PLB 844 (2023) 138076. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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