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SUMMARY:Jet Quenching and Holographic Thermalization
DTSTART;VALUE=DATE-TIME:20120816T200000Z
DTEND;VALUE=DATE-TIME:20120816T220000Z
DTSTAMP;VALUE=DATE-TIME:20130524T220928Z
UID:indico-contribution-61@cern.ch
DESCRIPTION:Speakers: YANG\, Di-Lun (D)\nThe AdS/CFT correspondence has be
 en widely used to study the jet quenching of hard probes traveling in the 
 strongly-coupled plasma. Nevertheless\, in most of studies\, the hard prob
 es were assumed to be created at the late time within the thermalized medi
 um. To understand the thermalization of the medium and its influence on hi
 gh-energy probes generated in the early time in the strongly-coupled scena
 rio would entail further investigations. In the gravity dual\, the thermal
 ization of the medium corresponds to the gravitational collapse and the fo
 rmation of a black hole. We utilize the AdS-Vaidya metric\, which describe
 s a falling mass shell\, to analyze the isotropic thermalization. In WKB a
 pproximation\, the dissipation of a high-energy jet traversing the medium 
 can be characterized by the stopping distance of a massless particle falli
 ng along the null geodesic in the gravity dual. We find the stopping dista
 nce of an energetic probe in AdS-Vaidya spacetime is equal to that in AdS-
 Schwarzschild spacetime\, which implies that a probe with the energy much 
 greater than the thermalization temperature is not be sensitive to the the
 rmalization process\, at least in this idealized scenario. This is differe
 nt from a gluon probe with finite energy represented by a falling string i
 n the gravity dual\, where the stopping distance is governed by the null g
 eodesic starting below the boundary. We find that the stopping distance is
  increased in the presence of the thermalization process.\n\nhttp://indico
 .cern.ch/contributionDisplay.py?contribId=61&sessionId=37&confId=181055
LOCATION: Regency 1/3 and Ambassador
URL:http://indico.cern.ch/contributionDisplay.py?contribId=61&sessionId=37
 &confId=181055
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