Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective String Rope Model for the initial stages of Ultra-Relativistic
  Heavy Ion Collisions   Different approaches to describe initial stages of relativistic heavy ion
collisions are discussed qualitatively and quantitatively. An Effective String
Rope Model is presented for heavy ion collisions at RHIC energies. Our model
takes into account baryon recoil for both target and projectile, arising from
the acceleration of partons in an effective field, produced in the collision.
The typical field strength (string tension) for RHIC energies is about 5-12
GeV/fm, what allows us to talk about ``string ropes''. The results show that a
QGP forms a tilted disk, such that the direction of the largest pressure
gradient stays in the reaction plane, but deviates from both the beam and the
usual transverse flow directions. The produced initial state can be used as an
initial condition for further hydrodynamical calculations. Such initial
conditions lead to the creation of third flow component.

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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
18
The categories of this paper are: econ
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The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio