Quantum Chromodynamics, the theory of quarks and gluons, whose interactions can be
described by a local SU (3) gauge symmetry with charges called “color quantum numbers” …

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 …

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 …

A bstract A search for Higgs boson pair production in events with two b-jets and two τ-
leptons is presented, using a proton–proton collision dataset with an integrated luminosity of …

A bstract A search for the electroweak production of pairs of charged sleptons or charginos
decaying into two-lepton final states with missing transverse momentum is presented. Two …

Precision measurements of electron reconstruction, identification, and isolation efficiencies
and photon identification efficiencies are presented. They use the full Run 2 data of $ pp …

This Letter reports on a search for off-shell production of the Higgs boson using 139 fb− 1 of
pp collision data at s= 13 TeV collected by the ATLAS detector at the Large Hadron Collider …

Differential and double-differential distributions of kinematic variables of leptons from decays
of top-quark pairs ($ t\bar {t} $) are measured using the full LHC Run 2 data sample …

A bstract A study of the polarisation and CP properties in ZZ production is presented. The
used data set corresponds to an integrated luminosity of 140 fb− 1 of proton-proton …