Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Disappearance of partonic collectivity in $\sqrt{s_{NN}}$ = 3 GeV Au+Au
  collisions at RHIC   We report on the measurements of directed flow $v_1$ and elliptic flow $v_2$
for hadrons ($\pi^{\pm}$, $K^{\pm}$, $K_{S}^0$, $p$, $\phi$, $\Lambda$ and
$\Xi^{-}$) from Au+Au collisions at $\sqrt{s_{NN}}$ = 3\,GeV and $v_{2}$ for
($\pi^{\pm}$, $K^{\pm}$, $p$ and $\overline{p}$) at 27 and 54.4\,GeV with the
STAR experiment. While at the two higher energy midcentral collisions the
number-of-constituent-quark (NCQ) scaling holds, at 3\,GeV the $v_{2}$ at
midrapidity is negative for all hadrons and the NCQ scaling is absent. In
addition, the $v_1$ slopes at midrapidity for almost all observed hadrons are
found to be positive, implying dominant repulsive baryonic interactions. The
features of negative $v_2$ and positive $v_1$ slope at 3\,GeV can be reproduced
with a baryonic mean-field in transport model calculations. These results imply
that the medium in such collisions is likely characterized by baryonic
interactions.

12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg