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 …

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 …

The performance of the ATLAS muon trigger system is evaluated with proton-proton ($ pp $)
and heavy-ion (HI) collision data collected in Run 2 during 2015-2018 at the Large Hadron …

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 …

Kinematic variables play an important role in collider phenomenology, as they expedite
discoveries of new particles by separating signal events from unwanted background events …

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 goal of this report is to summarize the current situation and discuss possible search
strategies for charged scalars, in non-supersymmetric extensions of the Standard Model at …

A search for the Higgs boson decaying into a pair of charm quarks is presented. The
analysis uses proton–proton collisions to target the production of a Higgs boson in …