The ALICE experiment was proposed in 1993, to study strongly-interacting matter at extreme
energy densities and temperatures. This proposal entailed a comprehensive investigation of …

The LHC has provided an unprecedented amount of proton–proton collision data, bringing
forth exciting opportunities to address fundamental open questions in particle physics …

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 …

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 …

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

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 …

The observation of the production of four top quarks in proton-proton collisions is reported,
based on a data sample collected by the CMS experiment at a center-of-mass energy of 13 …

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 …

Observation of quantum entanglement in top quark pair production in proton–proton collisions
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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 …