Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Azimuthal Dependence of Pion Interferometry at the AGS   Two-pion correlation functions, measured as a function of azimuthal emission
angle with respect to the reaction plane, provide novel information on the
anisotropic shape and orientation of the pion-emitting zone formed in heavy ion
collisions. We present the first experimental determination of this
information, for semi-central Au+Au collisions at 2-6 AGeV. The source
extension perpendicular to the reaction plane is greater than the extension in
the plane, and tilt of the pion source in coordinate space is found to be
opposite its tilt in momentum space.

1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol