Read article 'A new chapter opens with more Pb–Pb collisions for a precision study of hot and dense QCD matter'
After the restart of the LHC physics programme in June 2015 with world-record proton– proton collisions at √s = 13 TeV, nuclear beams reappeared in the LHC tunnel in Novembe...
Read article 'LHCb measures the effective double parton scattering cross-section with unprecedented precision'
In high-energy hadron–hadron collisions, each incoming hadron behaves as a loosely bound system of massless partons – quarks, antiquarks and gluons. The interaction of incoming hadrons is describe...
Read article 'ATLAS observes long-range elliptic anisotropies in √s = 13 and 2.76 TeV pp collisions'
Measurements of two-particle angular correlations in proton–proton (pp) collisions at the LHC have shown a feature commonly called the “ridge”: an enhancement in production of particle p...
Read article 'Penetrating and puzzling: photons shed light on heavy-ion collisions'
Résumé Les émissions de photons éclairent les collisions d’ions lourds La lumière émise dans des collisions à haute énergie de noyaux lourds révè...
Read article 'CMS observes long-range correlations in pp collisions at 13 TeV'
The CMS collaboration has published its first particle-correlation result from proton–proton (pp) collisions at a centre-of-mass energy of 13 TeV. The paper describes the observation of a phenomeno...
Read article 'STAR tracker snares heavy flavours'
Heavy quarks are important probes of the quark–gluon plasma that is produced when relativistic heavy ions collide. Because of a mass effect, it has been argued that heavy quarks lose less energy thr...
Read article 'ALICE in Vienna: from antinuclei to quark–gluon plasma'
The 2015 edition of the European Physical Society Conference on High Energy Physics (EPS-HEP 2015), which took place in Vienna in July (“Vienna hosts a high-energy particle waltz”), provid...
Read article 'ALICE goes forward with the ridge in pPb collisions'
One of the hottest debates at the LHC is the potential emergence of collective effects in proton–lead (pPb) collisions, prompted by the discovery of double ridge structures in angular correlatio...
Read article 'The most precise picture of the proton'
H1 and ZEUS release their definitive paper on deep-inelastic scattering.
Read article 'ALICE investigates ‘snowballs in hell’'
Résumé L’omelette norvégienne d’ALICE Il n’y a pas uniquement des hadrons ordinaires dans les débris des ” boules de feu ” produites par les collision...
