Evidence for four-top quark production in proton-proton collisions at √s=13 TeV
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
The production of four top quarks (ttt¯ t)¯ is studied with LHC proton-proton collision data samples
collected by the CMS experiment at a center-of-mass energy of 13 TeV, and corresponding to integrated
luminosities of up to 138 fb−1. Events that have no leptons (all-hadronic), one lepton, or two opposite sign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is
the first ttt¯ t measurement ¯ that includes the all-hadronic final state. The observed significance of the ttt¯ t¯
signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for ttt¯ t production, ¯
with a measured cross section of 36+12
−11 fb. Combined with earlier CMS results in other final states, the
signal significance is 4.0 standard deviations (3.2 expected). The combination returns an observed cross
section of 17 ± 4 (stat) ± 3 (syst) fb, which is consistent with the standard model prediction.
collected by the CMS experiment at a center-of-mass energy of 13 TeV, and corresponding to integrated
luminosities of up to 138 fb−1. Events that have no leptons (all-hadronic), one lepton, or two opposite sign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is
the first ttt¯ t measurement ¯ that includes the all-hadronic final state. The observed significance of the ttt¯ t¯
signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for ttt¯ t production, ¯
with a measured cross section of 36+12
−11 fb. Combined with earlier CMS results in other final states, the
signal significance is 4.0 standard deviations (3.2 expected). The combination returns an observed cross
section of 17 ± 4 (stat) ± 3 (syst) fb, which is consistent with the standard model prediction.
Date Issued
2023-09-10
Date Acceptance
2023-07-06
Citation
Physics Letters B, 2023, 844
ISSN
0370-2693
Publisher
Elsevier
Journal / Book Title
Physics Letters B
Volume
844
Copyright Statement
0370-2693/© 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by
SCOAP3.
SCOAP3.
License URL
Identifier
https://www.sciencedirect.com/science/article/pii/S0370269323004100?via%3Dihub
Subjects
Astronomy & Astrophysics
CMS
Physical Sciences
Physics
Physics, Nuclear
Physics, Particles & Fields
Science & Technology
Top quark
Publication Status
Published
Article Number
138076
Date Publish Online
2023-07-17