Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Establishing low-lying doubly charmed baryons   We systematically study the $S$-wave doubly charmed baryons using the method
of QCD sum rules. Our results suggest that the $\Xi_{cc}^{++}$ recently
observed by LHCb can be well identified as the $S$-wave $\Xi_{cc}$ state of
$J^P = 1/2^+$. We study its relevant $\Omega_{cc}$ state, whose mass is
predicted to be around 3.7 GeV. We also systematically study the $P$-wave
doubly charmed baryons, whose masses are predicted to be around 4.1 GeV.
Especially, there can be several excited doubly charmed baryons in this energy
region, and we suggest to search for them in order to study the fine structure
of the strong interaction.

25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ