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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-1557
DTSTART:20100122T220000Z
DURATION:PT1H0M0S
DTSTAMP:20260422T181638Z
LAST-MODIFIED:20100119T173226Z
LOCATION:2241 Chamberlin Hall (coffee at 3:30 pm)
SUMMARY:Quark-Gluon Plasma in QCD\, at RHIC and LHC\, and in String Th
 eory\, Physics Department Colloquium\, Krishna Rajagopal\, MIT
DESCRIPTION:The realization that the high temperature phase of QCD is 
 quark-gluon plasma\, with properties qualitatively distinct from those
  of the hadronic phase whose quasi-particles make up the matter in the
  everyday world around us\, goes back more than 30 years. Over that ti
 me\, we have gained reliable insight into the thermodynamics of quark-
 gluon plasma\, and we have understood much about its dynamics in the h
 igh temperature limit where it becomes weakly coupled. However\, in th
 e last five years experimental discoveries at the Relativistic Heavy I
 on Collider have taught us that\, at least at temperatures within a fa
 ctor of two of that at which hadrons ionize\, the dynamics of quark-gl
 uon plasma is closer to the ideal liquid limit than to the ideal gas l
 imit. These experimental data demand a theoretical understanding of th
 e dynamics of strongly coupled quark-gluon plasma. Such calculations i
 n QCD itself are in their infancy\, but string theory provides us with
  robust tools for exactly this purpose\, applicable to the quark-gluon
  plasmas of many QCD-like theories. I will describe some of the many n
 ew insights into the properties of strongly coupled plasma obtained re
 cently from these calculations in which difficult quark-gluon plasma q
 uestions are mapped onto easy gravity questions\, and look ahead towar
 d the expected interplay between these calculations and heavy ion coll
 ision experiments at the LHC.
URL:https://www.physics.wisc.edu/events/?id=1557
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