Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadron-string cascade versus hydrodynamics in Cu+Cu collisions at
  $\sqrt{s_{NN}}=200$ GeV   Single particle spectra as well as elliptic flow in Cu+Cu collisions at
$\sqrt{s_{NN}}=200$ GeV are investigated within a hadronic cascade model and an
ideal hydrodynamic model. Pseudorapidity distribution and transverse momentum
spectra for charged hadrons are surprisingly comparable between these two
models. However, a large deviation is predicted for the elliptic flow. The
forthcoming experimental data will clarify the transport and thermalization
aspects of matter produced in Cu+Cu collisions.

27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con