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DTSTART;TZID=America/Chicago:20240426T153000
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DTSTAMP:20260611T154903
CREATED:20240301T171028Z
LAST-MODIFIED:20240426T125548Z
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SUMMARY:Physics Colloquium - Rob Pisarski
DESCRIPTION:Rob Pisarski\, Distinguished Scientist\, Department of Physics\, Brookhaven National Laboratory \nThe Ugly Duckling and the Swan: The Quark-Gluon Plasma and Heavy Ion Collision \nI give a pedagogical and historical overview of the search for the Quark-Gluon plasma (QGP) in the collisions of heavy ions.  I begin with a brief review of why we expect a QGP to be formed at high temperature.  In this\, numerical simulations in lattice Quantum ChromoDynamics (QCD) form the bedrock of the field.  In particular\, they demonstrate the relationship between deconfinement and the restoration of chiral symmetry. \nAt the SPS at CERN\, I discuss the suppression of J/Psi mesons\, and the excess of dileptons below the rho meson.  Bjorken first noticed that a “plateau” may emerge at high energies\, and produce a regime at high temperature\, and low chemical potential.  At colliders such as RHIC\, at Brookhaven\, and the LHC\, at CERN\, I discuss two notable signals:  the utility of nearly ideal hydrodynamics\, and jet quenching.  The new frontier is going down to moderate collision energies\, which there is net excess of baryons.  Possible phenomena in this region include a critical end point and moat regimes. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-rob-pisarski/
LOCATION:KIRC 1150\, 3135 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Physics Colloquia
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