Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Matching the Nonequilibrium Initial Stage of Heavy Ion Collisions to
  Hydrodynamics with QCD Kinetic Theory   High-energy nuclear collisions produce a nonequilibrium plasma of quarks and
gluons which thermalizes and exhibits hydrodynamic flow. There are currently no
practical frameworks to connect the early particle production in classical
field simulations to the subsequent hydrodynamic evolution. We build such a
framework using nonequilibrium Green's functions, calculated in QCD kinetic
theory, to propagate the initial energy-momentum tensor to the hydrodynamic
phase. We demonstrate that this approach can be easily incorporated into
existing hydrodynamic simulations, leading to stronger constraints on the
energy density at early times and the transport properties of the QCD medium.
Based on (conformal) scaling properties of the Green's functions, we further
obtain pragmatic bounds for the applicability of hydrodynamics in nuclear
collisions.

36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat