Abstract
The Standard Model production of four top quarks in the process pp --> tttt at a center-of-mass energy s1/2=13 Tev. The data collected by the ATLAS detector represents an impressive study potential, with an integrated luminosity of around 139 fb-1. In this manuscript, we present the production process of four top quarks at the LHC as well as some new physics models associated with this process. These models are studied in analysis carried. Some preliminary results are presented, in particular those of a new method for estimating background noise due to false leptons developed.
Highlights
The standard model (SM) of particle physics describes the elementary particles that make up matter and their interactions
Several limitations of this model, such as the absence of a coherent description of the gravitational interaction, lead to the development of new models or extensions of the standard model, qualified as "New Physics" beyond the standard model (BSM). None of these new physics models has been sufficiently supported by experience, and physics beyond the standard model remains an open question
The cross section of the production process of four top σtttt quarks is increased in many BSM models
Summary
The standard model (SM) of particle physics describes the elementary particles that make up matter and their interactions. Its coupling of Yukawa to the Higgs boson is neare to 1, which makes it a key element in many models of new physics. The existence of the diagram on the left of figure 4 as well as other similar diagrams makes it possible in particular to constrain the Yukawa coupling of the top quark via the measurement of σtttt, and to place constraints on the width of the boson of Higgs by combining this result with the measurement of the cross section of the process pp → ttH [2]. This article describes the process of producing four top quarks and some new physics models that can lead to an increase in σtttt. The best current results on σtMtttS at the LHC at 13TeV are 12.6+−55..82 fb for the CMS experiment [3], and 28.5+−1121 fb for the experiment ATLAS [4]
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