The Approach to Equilibrium in Strongly Interacting Matter
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The purpose of this Workshop is to critically review the recent
progress on the theory and phenomenology of early time dynamics in
relativistic heavy ion collisions from RHIC to LHC energies, to examine
the various approaches on thermalization and existing issues, and to
formulate new research efforts for the future.
Specific topics we plan to address include:
- Experimental evidence for equilibration/isotropization. What do the
latest experimental results say about these questions? How model
(in)dependent are these conclusions? Since the pressure isotropization
is important for hydrodynamics, is there a way to assess the
longitudinal pressure from measurements?
- Comparison of various approaches. Various tools and approaches have
been employed to study thermalization: kinetic theory, 2-particle
irreducible formalism, classical statistical field theory, strong
coupling techniques such as AdS/CFT,... Do their range of applicability
overlap? How do they compare (in terms of ease of application, and in
- Dependence on the initial conditions and couplings. Typically, the
late time behavior of a system confined in a fixed volume will only
depend on the conserved quantities, regardless of the details of the
initial conditions. However, transient regimes will differ in general.
When a system is free to expand in empty space, is there still a
(partial) loss of details about the intial conditions? Are there various
limiting regimes, depending on initial conditions and/or values of
couplings? In heavy ion collisions, the initial conditions just after
the collision are characterized by a strong coherent color field
surrounded by small fluctuations. What is the role played by this
coherent field? What is the role of plasma instabilities, in particular,
at later stages of the evolution?
- Turbulent cascades and Bose-Einstein condensation. Various studies
performed in toy scalar models have shown that, if the initial condition
is overpopulated, turbulent cascades may form and the particle excess
can condense in the zero mode. This excess is gradually destroyed later
on by inelastic processes. In heavy ion collisions, the initial
condition is similarly overpopulated, but elastic and inelastic
processes are parametrically of the same order in the coupling in
contrast to the scalar field theory case. How does the formation of
turbulent cascades and the question under which conditions a
Bose-Einstein condensate could form compare between scalar and non-Abelian
gauge field theory? What roles do the inelastic processes play during
the evolution of a non-Abelian gauge field system with initial
Presentations will be mainly by invitation. We expect to be
able to accommodate a limited number of contributed talks. If you are interested
in presenting a contributed talk, please contact one of the organizers.
Registered attendees are invited to attend the optional banquet dinner; free of charge for registered participants.
Brookhaven Center (Bldg. 30) South Room
Thursday Night, April 3, 2014
- Juergen Berges (Heidelberg U)
- Jean-Paul Blaizot (Saclay)
- Francois Gelis (Saclay)
- Jinfeng Liao (Indiana U & RBRC)
- Raju Venugopalan (BNL)
Click on the "Workshop Information"
tab above to find accommodation information.
Last Modified: December 18, 2013