Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dark Gauge U(1) Symmetry for an Alternative Left-Right Model   An alternative left-right model of quarks and leptons, where the $SU(2)_R$
lepton doublet $(\nu,l)_R$ is replaced with $(n,l)_R$ so that $n_R$ is not the
Dirac mass partner of $\nu_L$, has been known since 1987. Previous versions
assumed a global $U(1)_S$ symmetry to allow $n$ to be identified as a
dark-matter fermion. We propose here a gauge extension by the addition of extra
fermions to render the model free of gauge anomalies, and just one singlet
scalar to break $U(1)_S$. This results in two layers of dark matter, one hidden
behind the other.

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The categories of this paper are: nlin
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The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: ao-sci
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con