Particle physics today faces the challenge of explaining the mystery of dark matter, the origin
of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent …

This report presents a comprehensive collection of searches for new physics performed by
the ATLAS Collaboration during the Run 2 period of data taking at the Large Hadron …

A bstract A search is presented for physics beyond the standard model (SM) using electron
or muon pairs with high invariant mass. A data set of proton-proton collisions collected by …

A bstract A search is presented for new particles produced at the LHC in proton-proton
collisions at\(\sqrt {s}\)= 13 TeV, using events with energetic jets and large missing …

A search for invisible decays of the Higgs boson as well as searches for dark matter
candidates, produced together with a leptonically decaying Z boson, are presented. The …

A bstract The results of a search for new phenomena in final states with b-jets and missing
transverse momentum using 139 fb− 1 of proton-proton data collected at a centre-of-mass …

A bstract A search for dark matter is conducted in final states containing a photon and
missing transverse momentum in proton-proton collisions at\(\sqrt {s}\)= 13 TeV. The data …

A bstract The first collider search for dark matter arising from a strongly coupled hidden
sector is presented and uses a data sample corresponding to 138 fb− 1, collected with the …

This report, as part of the 2021 Snowmass Process, summarizes the current status of collider
physics at the Energy Frontier, the broad and exciting future prospects identified for the …

This paper presents a statistical combination of searches targeting final states with two top
quarks and invisible particles, characterised by the presence of zero, one or two leptons, at …