Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New $[SU(3)]^4$ Realization of Lepton/Dark Symmetry   Extending the well-known $SU(3)_C \times SU(3)_L \times SU(3)_R$ model of
quarks and leptons to include a fourth $SU(3)_N$ gauge factor, a new
realization is obtained, different from leptonic color, which contains a
lepton/dark symmetry with the help of an input $Z_4$ symmetry. It is seen to
encompass a previous extension of the standard model to $SU(2)_N$ lepton
symmetry.

13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys