Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dissipation and elliptic flow at RHIC   We compare elliptic flow evolution from ideal hydrodynamics and covariant
parton transport theory, and show that, for conditions expected at RHIC,
dissipation significantly reduces elliptic flow even for extreme parton cross
sections and/or densities sigma_gg * dN/d\eta(b=0) ~ 45 mb * 1000. The
difference between transport and hydrodynamic elliptic flow is established
rather early during the evolution of the system, but the buildup of elliptic
flow is surprisingly insensitive to the choice of the initial (formation or
thermalization) time in both models.

18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con