The standard model of particle physics,,–describes the known fundamental particles and
forces that make up our Universe, with the exception of gravity. One of the central features of …

This paper presents the observation of four-top-quark (tt¯ tt¯) production in proton-proton
collisions at the LHC. The analysis is performed using an integrated luminosity of 140 fb-1 at …

A bstract Measurements of Higgs boson production cross-sections are carried out in the
diphoton decay channel using 139 fb− 1 of pp collision data at\(\sqrt {s}\)= 13 TeV collected …

Jet energy scale and resolution measurements with their associated uncertainties are
reported for jets using 36–81 fb-1 of proton–proton collision data with a centre-of-mass …

Searches are performed for nonresonant and resonant di-Higgs boson production in the bb¯
γ γ final state. The dataset used corresponds to an integrated luminosity of 139 fb-1 of proton …

Results of a search for new physics in final states with an energetic jet and large missing
transverse momentum are reported. The search uses proton-proton collision data …

The ATLAS detector [1] at the CERN Large Hadron Collider (LHC)[2] is a multipurpose
particle detector, optimised to exploit the full physics potential of high-energy proton-proton …

Electron and photon triggers covering transverse energies from 5 GeV GeV to several TeV
TeV are essential for the ATLAS experiment to record signals for a wide variety of physics …

Combined measurements of Higgs boson production cross sections and branching fractions
are presented. The combination is based on the analyses of the Higgs boson decay modes …

The identification of $ b $-jets, referred to as $ b $-tagging, is an important part of many
physics analyses in the ATLAS experiment at the Large Hadron Collider and an accurate …