The production of four top quarks (t¯ tt¯ t) is studied with LHC proton-proton collision data samples collected by the CMS experiment at a center-of-mass energy of 13TeV, and corresponding to integrated luminosities of up to 138fb−1. Events that have no leptons (all-hadronic), one lepton, or two oppositesign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is the first t¯ tt¯ tmeasurement that includes the all-hadronic final state. The observed significance of the t¯ tt¯ t signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for t¯ tt¯ tproduction, 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.

Tumasyan A., Adam W., Andrejkovic J.W., Bergauer T., Chatterjee S., Damanakis K., et al. (2023). Evidence for four-top quark production in proton-proton collisions at √ s =13TeV. PHYSICS LETTERS. SECTION B, 844, 1-25 [10.1016/j.physletb.2023.138076].

Evidence for four-top quark production in proton-proton collisions at √ s =13TeV

Battilana C.;Bonacorsi D.;Borgonovi L.;Castro A.;Cuffiani M.;Diotalevi T.;Fanfani A.;Giommi L.;Guiducci L.;Lunerti L.;Rovelli T.;Siroli G. P.;
2023

Abstract

The production of four top quarks (t¯ tt¯ t) is studied with LHC proton-proton collision data samples collected by the CMS experiment at a center-of-mass energy of 13TeV, and corresponding to integrated luminosities of up to 138fb−1. Events that have no leptons (all-hadronic), one lepton, or two oppositesign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is the first t¯ tt¯ tmeasurement that includes the all-hadronic final state. The observed significance of the t¯ tt¯ t signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for t¯ tt¯ tproduction, 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.
2023
Tumasyan A., Adam W., Andrejkovic J.W., Bergauer T., Chatterjee S., Damanakis K., et al. (2023). Evidence for four-top quark production in proton-proton collisions at √ s =13TeV. PHYSICS LETTERS. SECTION B, 844, 1-25 [10.1016/j.physletb.2023.138076].
Tumasyan A.; Adam W.; Andrejkovic J.W.; Bergauer T.; Chatterjee S.; Damanakis K.; Dragicevic M.; Escalante Del Valle A.; Hussain P.S.; Jeitler M.; Kra...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/957638
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