Séminaire spécialisé

mardi 7 juillet 2015 à 12:20

Amphi G. Besse

New State of Nuclear Matter in Heavy Ion Collisions at RHIC: Physics and Detectors

Rachid Nouicer

Department of Physics, Brookhaven National Laboratory, New York, United States

Measurements made in heavy-ion collisions at the Relativistic Heavy Ion Collider (RHIC) have led to a broad and deep understanding of the properties of hot QCD matter. It has been determined that the quark-gluon plasma (QGP) created in Au+Au collisions at √sNN = 200 GeV is a strongly coupled liquid with the lowest value of speci c viscosity ever measured. These findings are supported by major empirical observations from both soft and hard probe sectors at RHIC and LHC energies.
In this talk, I present the findings obtained by major experimental observations via measurements of the bulk properties of particle production, particle ratios and chemical freeze-out conditions, and elliptic flow. I then discuss hard probe measurements: high-pT  hadron suppression, dijet fragment azimuthal correlations, and heavy  flavor probes. These measurements are presented for particles of di fferent species as a function of system sizes, collision centrality, and energy carried out in RHIC experiments. I also present in detail my extensive experience with detector design, construction, assembly, signal processing and operation with regards to the silicon multiplicity/vertex detectors and the silicon vertex tracker used in the PHOBOS and PHENIX experiments at RHIC, respectively.