Today at Berkeley Lab

Quark Matter Conference Turns to the LHC

ALICE, custom-designed to study heavy-ion collisions, reported among other results that the LHC’s lead-lead collisions are the densest matter ever observed, denser than the heart of a neutron star. ATLAS, whose Berkeley Lab contingent is headed by Ian Hinchliffe of Physics, reported details on jet quenching, a phenomenon first observed by the STAR experiment at Brookhaven’s Relativistic Heavy Ion Collider (RHIC), and presented new results on energy flow and total particle multiplicity, twice that at RHIC. STAR (pictured), designed and partially built at Berkeley Lab, whose spokesperson is Nu Xu of NSD, was also well represented. NSD’s Hiroshi Masui gave a plenary talk noting STAR’s detection of the anti-helium nucleus and other significant discoveries, and NSD’s Alexander Schmah, Yifei Zhang, and Jie Zhao presented new STAR results. On the theory side, Giovanni Chrilli and Xin-Nian Wang of NSD gave parallel talks, and Volker Koch led a plenary discussion on fluctuations and correlations in heavy ion collisions. More>