CMS has probed the running of the mass of the top quark for the first time - an important test of the validity of QCD, and an indirect search for unknown physics.
Jet modification effects are predicted to be strongest in this kinematic region.
Though several mysteries remain, the ALICE collaboration has uncovered evidence that quark-gluon plasmas with extreme angular momenta become polarised.
Quark Matter 2019 heard about new probes of the quark-gluon plasma, including first observations of the exotic hadron X(3872) and top-antitop production.
The LHC’s physics programme has transformed our understanding of elementary particles, writes Michelangelo Mangano.
The quark-gluon plasma has a characteristic angular scale below which high-momentum shower components are not resolved, but interact as a single partonic fragment.
The LHCb experiment has observed new beauty-baryon states, consistent with theoretical expectations for excited Ωb− baryons.
A new measurement by ALICE casts recent debates on this bound state of a proton, neutron and Λ in a new light.
When fewer than half the available lead nucleons merge and form a quark–gluon plasma, the spectators generate the strongest electromagnetic fields yet probed by scientists.
The 2019 edition of New Trends in High Energy Physics had an emphasis on heavy-ion physics and strong interactions.