The production of four top quarks () 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. 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 measurement that includes the all-hadronic final state. The observed significance of the signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for production, with a measured cross section of . 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 , which is consistent with the standard model prediction.
Evidence for four-top quark production in proton-proton collisions at s=13TeV
Arcidiacono R.;Arneodo M.;Ruspa M.;
2023-01-01
Abstract
The production of four top quarks () 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. 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 measurement that includes the all-hadronic final state. The observed significance of the signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for production, with a measured cross section of . 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 , which is consistent with the standard model prediction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
