Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A study of the anisotropy associated with dipole asymmetry in heavy ion
  collisions   The anisotropy associated with the initial dipole asymmetry in heavy ion
collisions is studied via the two-particle relative azimuthal azimuthal angle
(\Delta\phi=\phi^a-\phi^b) correlations, within a multi-phase transport model.
For a broad selection of centrality, transverse momenta (pT^{a,b}) and
pseudorapidity (\eta^{a,b}), a fitting method is used to decompose the
anisotropy into a rapidity-even component, characterized by the Fourier
coefficient v1, and a global momentum conservation component. The extracted v1
values are negative for pT<=0.7-0.9 GeV, reach a maximum at 2-3 GeV, and
decreases at higher pT. The v1 values vary weakly with \eta and centrality, but
increases with collision energy and parton cross-section. The extracted global
momentum conservation component is found to depend on \Delta\eta= \eta^a-\eta^b
for \Delta\eta<3.

16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an