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 …

Specialized data-taking and data-processing techniques were introduced by the CMS
experiment in Run 1 of the CERN LHC to enhance the sensitivity of searches for new …

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 flavour-tagging algorithms developed by the ATLAS Collaboration and used to analyse
its dataset of s= 13 TeV pp collisions from Run 2 of the Large Hadron Collider are presented …

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 …

The ATLAS experiment has developed extensive software and distributed computing
systems for Run 3 of the LHC. These systems are described in detail, including software …

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 …

Entanglement is a key feature of quantum mechanics1–3, with applications in fields such as
metrology, cryptography, quantum information and quantum computation4–8. It has been …

Constraints on the Higgs boson self-coupling are set by combining double-Higgs boson
analyses in the bb¯ bb¯, bb¯ τ+ τ− and bb¯ γ γ decay channels with single-Higgs boson …

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