Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Origin of the Trigger-Angle Dependence of the Ridge Structure   The origin of the trigger-angle dependence of the ridge structure in
two-hadron long-range correlations, as observed at RHIC, is discussed as due to
an interplay between the elliptic flow caused by the initial state global
geometry and flow produced by fluctuations.

10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn