Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Seesaw neutrino masses with a second Higgs doublet added   We study parameters of an extended standard model. The neutrino sector is
enlarged by one or two right-handed singlet fields and the Higgs sector
contains one additional doublet. One-loop radiative corrections generate the
mass for the light neutrino fields. The numerical analysis is performed varying
the masses of heavy neutrinos and of the additional neutral Higgses. The
parameters of the neutrino sector, allowing for the seesaw type-I mechanism,
are restricted by experimental neutrino oscillation data. Both normal and
inverted hierarchies of the light neutrino masses are discussed.

36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th