Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge asymmetry dependency of $\pi^{+}/\pi^{-}$ elliptic flow in Au +
  Au collisions at $\sqrt{s_{NN}}$ = 200 GeV   In this proceedings, we present STAR's measurement of $v_{2}$ difference
between positively charged pions and negatively charged pions at low transverse
momentum for Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The integrated
$v_2$ of $\pi^+$ ($\pi^-$), $0.15 < p_T < 0.5 GeV/c$, decreases (increases)
linearly with the increasing charge asymmetry $A_{\pm}$. The $v_2$ difference
between $\pi^+$ and $\pi^-$ is proportional to $A_{\pm}$ and the slope
parameters have their order of magnitude of about 0.01. All of these observed
features are consistent with the predication based on Chiral Magnetic Wave. The
centrality dependence of the $v_2$ difference is different than that was
predicted.

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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: math
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
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The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: cs
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
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The categories of this paper are: stat
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The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph