Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proton Decay and Neutrino Masses in SO(10)   In the last few years physicists have been looking at $SO(10)$ GUT models
with renewed attention because it has been realized that the SU(5) minimal
model cannot unify the strong, electromagnetic and weak interactions in a way
consistent with the experimental values of $\alpha(M_Z)$, $\si$ and
$\alpha_S(M_Z)$. In this paper we derive lower limits on neutrino masses,
relevant for cosmology and for the solar-neutrino problem, from necessary
consistency conditions on a class of $SO(10)$ models with $\sq$ or $\stt$
intermediate gauge symmetry.

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The categories of this paper are: dg-ga
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The categories of this paper are: stat
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
1
The categories of this paper are: cs
2
The categories of this paper are: math
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th