Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Seesaw neutrino masses from an $A_4$ model with two equal vacuum
  expectation values   We present a model for the lepton sector, with $A_4$ horizontal-symmetry
group, in which two of the Higgs doublets in an $A_4$ triplet of Higgs doublets
have equal vacuum expectation values. The model makes well-defined predictions
for the effective light-neutrino Majorana mass matrix. We show that those
predictions are compatible with the experimental data.

18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin