Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-conformal attractor in boost-invariant plasmas   We study the dissipative evolution of (0+1)-dimensionally expanding media
with Bjorken symmetry using the Boltzmann equation for massive particles in
relaxation-time approximation. Breaking conformal symmetry by a mass induces a
non-zero bulk viscous pressure in the medium. It is shown that even a small
mass (in units of the local temperature) drastically modifies the well-known
attractor for the shear Reynolds number previously observed in massless
systems. For generic nonzero particle mass, neither the shear nor the bulk
viscous pressure relax quickly to a non-equilibrium attractor; they approach
the hydrodynamic limit only late, at small values of the inverse Reynolds
numbers. Only the longitudinal pressure, which is a combination of thermal,
shear and bulk viscous pressures, continues to show early approach to a
far-off-equilibrium attractor, driven by the rapid longitudinal expansion at
early times. Second-order dissipative hydrodynamics based on a gradient
expansion around locally isotropic thermal equilibrium fails to reproduce this
attractor.

30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg