Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Azimuthal-angle dependence of charged-pion-interferometry measurements
  with respect to 2$^{\rm nd}$- and $3^{\rm rd}$-order event planes in Au$+$Au
  collisions at $\sqrt{s_{_{NN}}}=200$ GeV   Charged-pion-interferometry measurements were made with respect to the
2$^{\rm nd}$- and 3$^{\rm rd}$-order event plane for Au$+$Au collisions at
$\sqrt{s_{_{NN}}}=200$ GeV. A strong azimuthal-angle dependence of the
extracted Gaussian-source radii was observed with respect to both the 2$^{\rm
nd}$- and 3$^{\rm rd}$-order event planes. The results for the 2$^{\rm
nd}$-order dependence indicate that the initial eccentricity is reduced during
the medium evolution, but not reversed in the final state, which is consistent
with previous results. In contrast, the results for the 3$^{\rm rd}$-order
dependence indicate that the initial triangular shape is significantly reduced
and potentially reversed by the end of the medium evolution, and that the
3$^{\rm rd}$-order oscillations are largely dominated by the dynamical effects
from triangular flow.

37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph