Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Study of $e^+e^- \rightarrow \pi^{0}X(3872)\gamma$ and search for
  $Z_c(4020)^{0}\rightarrow X(3872)\gamma$   Using data samples collected with the BESIII detector operating at the BEPCII
storage ring at center-of-mass energies from 4.178 to 4.600 GeV, we study the
process $e^+e^-\rightarrow\pi^{0}X(3872)\gamma$ and search for
$Z_c(4020)^{0}\rightarrow X(3872)\gamma$. We find no significant signal and set
upper limits on
$\sigma(e^+e^-\rightarrow\pi^{0}X(3872)\gamma)\cdot\mathcal{B}(X(3872)\rightarrow\pi^{+}\pi^{-}J/\psi)$
and
$\sigma(e^+e^-\rightarrow\pi^{0}Z_c(4020)^{0})\cdot\mathcal{B}(Z_c(4020)^{0}\rightarrow
X(3872)\gamma)\cdot\mathcal{B}(X(3872)\rightarrow\pi^{+}\pi^{-}J/\psi)$ for
each energy point at $90\%$ confidence level, which is of the order of several
tenths pb.

9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th