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 …

A search for heavy neutral Higgs bosons is performed using the LHC Run 2 data,
corresponding to an integrated luminosity of 139 fb-1 of proton-proton collisions at s= 13 …

This paper presents results of searches for the electroweak production of supersymmetric
particles in models with compressed mass spectra. The searches use 139 fb-1 of s= 13 TeV …

A search is presented for four-top-quark production using an integrated luminosity of 139 fb^-
1-1 of proton–proton collision data at a centre-of-mass energy of 13~ TeV 13 TeV collected …

A search for the electroweak production of charginos and sleptons decaying into final states
with two electrons or muons is presented. The analysis is based on 139 fb\(^{-1}\) of proton …

A bstract The factor of four increase in the LHC luminosity, from 0. 5× 10 34 cm− 2 s− 1 to 2.
0× 10 34 cm− 2 s− 1, and the corresponding increase in pile-up collisions during the 2015 …

A study of the charge conjugation and parity (CP) properties of the interaction between the
Higgs boson and top quarks is presented. Higgs bosons are identified via the diphoton …

Higgs boson properties are studied in the four-lepton decay channel (where lepton= $ e $,
$\mu $) using 139 fb $^{-1} $ of proton-proton collision data recorded at $\sqrt {s} $= 13 TeV …

A search for direct pair production of scalar partners of the top quark (top squarks or scalar
third-generation up-type leptoquarks) in the all-hadronic t ̄ t tt¯ plus missing transverse …

A bstract A search for new-physics resonances decaying into a lepton and a jet performed
by the ATLAS experiment is presented. Scalar leptoquarks pair-produced in pp collisions …