Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unification without low-energy supersymmetry   Without supersymmetry, the gauge couplings in the standard model with five
Higgs doublets unify around 10^14 GeV. In this case, the trinified model,
SU(3)_C x SU(3)_L x SU(3)_R x Z_3, with the minimal Higgs sector required for
symmetry breaking, is the ideal grand-unified candidate. Small neutrino masses
are generated via a radiative seesaw mechanism, without the need for
intermediate scales, additional Higgs fields, or higher-dimensional operators.
The proton lifetime is above the experimental limits, with the decay modes p ->
\bar\nu K^+ and p -> mu^+ K^0 potentially observable. The split-SUSY version of
the model, with one light Higgs doublet, is equally attractive.

35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th