Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gauging the Shadow Sector with SO(3)   We examine the phenomenology of a low-energy extension of the Standard Model,
based on the gauge group SU(3) x SU(2) x U(1) x SO(3), with SO(3) operating in
the shadow sector. This model offers $\nu_{e} \to \nu_{s}$ and $\nu_{\mu} \to
\nu_{\tau}$ oscillations as the solution of the solar and atmospheric neutrino
problems. Moreover, it provides a neutral heavy shadow lepton X that could play
the role of a cold dark matter particle.

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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: solv-int
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci