Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Doubly hidden-charm/bottom $QQ\bar Q\bar Q$ tetraquark states   We study the mass spectra for the $cc\bar c\bar c$ and $bb\bar b\bar b$
tetraquark states by developing a moment sum rule method. Our results show that
the $bb\bar b\bar b$ tetraquarks lie below the threshold of
$\eta_b(1S)\eta_b(1S)$. They are probably stable and very narrow. The masses
for the doubly hidden-charm states $cc\bar c\bar c$ are higher than the
spontaneous dissociation thresholds of two charmonium mesons. We suggest to
search for such states in the $J/\psi J/\psi$ and $\eta_c(1S)\eta_c(1S)$
channels.

15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol