Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic particle production and azimuthal correlations in
  high-energy pA collisions   We summarize some recent ideas relating to anisotropic particle production in
high-energy collisions. Anisotropic gluon distributions lead to anisotropies of
the single-particle azimuthal distribution and hence to disconnected
contributions to multi-particle cumulants. When these dominate, the
four-particle elliptic anisotropy $c_2\{4\}$ changes sign. On the other hand,
connected diagrams for $m$-particle cumulants are found to quickly saturate
with increasing $m$, a ``coherence'' quite unlike conventional ``non-flow''
contributions such as decays. Finally, we perform a first exploratory
phenomenological analysis in order to estimate the amplitude ${\cal A}$ of the
$\cos(2\varphi)$ anisotropy of the gluon distribution at small $x$, and we
provide a qualitative prediction for the elliptic asymmetry from three-particle
correlations, $c_2\{3\}$.

37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics