Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: QCD sum rule studies on the $s s \bar s \bar s$ tetraquark states with
  $J^{PC} = 1^{+-}$   We apply the method of QCD sum rules to study the structure $X$ newly
observed by the BESIII Collaboration in the $\phi \eta^\prime$ mass spectrum in
2.0-2.1 GeV region in the $J/\psi \rightarrow \phi \eta \eta^\prime$ decay. We
construct all the $s s \bar s \bar s$ tetraquark currents with $J^{PC} =
1^{+-}$, and use them to perform QCD sum rule analyses. One current leads to
reliable QCD sum rule results and the mass is extracted to be
$2.00^{+0.10}_{-0.09}$ GeV, suggesting that the structure $X$ can be
interpreted as an $s s \bar s \bar s$ tetraquark state with $J^{PC} = 1^{+-}$.
The $Y(2175)$ can be interpreted as its $s s \bar s \bar s$ partner having
$J^{PC} = 1^{--}$, and we propose to search for the other two partners, the $s
s \bar s \bar s$ tetraquark states with $J^{PC} = 1^{++}$ and $1^{-+}$, in the
$\eta^\prime f_0(980)$, $\eta^\prime K \bar K$, and $\eta^\prime K \bar K^*$
mass spectra.

26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga