The LHCb data also confirm that the structure previously reported by the collaboration in 2015 has now been resolved into two narrow, overlapping peaks.
The quarkonium yield is suppressed in heavy-ion collisions when compared with proton–proton collisions because the binding force is screened by the hot and dense medium.
This largely unexplored phenomenon is expected to occur when the gluons in a hadron overlap transversally, and is enhanced for hadrons with high atomic numbers.
The ALICE collaboration has measured the photoproduction of J/ψ mesons.
This is essential to understand how charm-quark hadronisation is affected by the presence of the quark–gluon plasma.
Due to their short lifetimes, they decay when the system is still dense and the decay products scatter in the hadron gas, reducing the observed number of decays.
In contrast to strongly interacting hadronic probes, dielectrons provide an unperturbed view into the quark–gluon plasma.
The LHCb fixed-target system, known as SMOG, injects a small amount of noble gas inside the LHC beam pipe.
The National Academy of Sciences in the US finds a compelling scientific case for an advanced collider that would reveal how visible matter emerges from fundamental quarks and gluons.
The ALICE collaboration has released a new measurement of the production of D mesons.