Read article 'ALICE measures shape of the QGP fireball at freeze-out'
Heavy-ion collisions at LHC energies create a hot and dense medium of deconfined quarks and gluons, known as the quark–gluon plasma (QGP). The QGP fireball first expands, cools and then freezes out ...
Read article 'The two-loop explosion'
Studying matter at the highest energies possible has transformed our understanding of the microscopic world. CERN’s Large Hadron Collider (LHC), which generates proton collisions at the highest ener...
Read article 'A 30-year adventure with heavy ions'
Heavy-ion and proton–proton collisions at ultrarelativistic energies provide a unique system with which to investigate the dynamics of matter in the early universe. By generating an incredibly hot a...
Read article 'ALICE studies beauty in the quark–gluon plasma'
In high-energy nucleus–nucleus collisions, heavy-flavour quarks (charm and beauty) are produced on a very short time scale in initial hard-scattering processes and thus they experience the entire ev...
Read article 'Quark–gluon plasma insights'
Powerful supercomputer simulations of colliding atomic nuclei have provided new insights about quark–gluon plasma (QGP), a superhot fluid of de-confined partons produced in heavy-ion collisions at t...
Read article 'ALICE zeroes in on cold-matter effects'
Measuring the production cross-section of charm hadrons in proton–proton collisions provides an important test of perturbative quantum chromodynamics (QCD). In proton–nucleus collisions, “cold-m...
Read article 'Protons probe quark–gluon plasma at CMS'
Proton–nucleus collisions provide a crucial tool to investigate the quark–gluon plasma (QGP), a state of nuclear matter with a high energy density spread over a relatively large volume. Although p...
Read article 'LHCb searches for strong CP violation'
CP violation, which relates to an asymmetry between matter and antimatter, is a well-established feature of the weak interaction that mediates decays of strange, charm and beauty particles. It arises ...
Read article 'ALICE prepares for high-luminosity LHC'
The LHC is preparing for a major high-luminosity upgrade (HL-LHC) with the objective to increase the instantaneous luminosity to around 2 × 1035 cm–2 s–1 for proton–proton (pp) collisio...
Read article 'ALICE explores shear viscosity in QCD matter'
One of the key goals in exploring the properties of QCD matter is to pin down the temperature dependence of the shear-viscosity to entropy-density ratio (η/s). In the limit of a weakly interactin...
