From raw detector activations to reconstructed particles, data at the Large Hadron Collider
(LHC) are sparse, irregular, heterogeneous and highly relational in nature. Graph neural …

The luminosity determination for the ATLAS detector at the LHC during Run 2 is presented,
with $ pp $ collisions at $\sqrt {s}= 13$ TeV. The absolute luminosity scale is determined …

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 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 …

Searches for long-lived particles (LLPs) are among the most promising avenues for
discovering physics beyond the Standard Model at the Large Hadron Collider (LHC) …

This paper presents the muon momentum calibration and performance studies for the
ATLAS detector based on the pp collisions data sample produced at s= 13 TeV at the LHC …

Vector-boson scattering (VBS) processes probe the innermost structure of electroweak (EW)
interactions in the Standard Model (SM), and provide a unique sensitivity for new physics …

A search is made for potential ccc [over¯] c [over¯] tetraquarks decaying into a pair of
charmonium states in the four muon final state using proton-proton collision data at sqrt [s] …

A search for new phenomena in final states with hadronically decaying tau leptons, b-jets,
and missing transverse momentum is presented. The analyzed dataset comprises pp …