Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The role of sterile neutrinos in cosmology and astrophysics   We present a comprehensive overview of an extension of the Standard Model
that contains three right-handed (sterile) neutrinos with masses below the
electroweak scale [the Neutrino Minimal Standard Model, (nuMSM)]. We consider
the history of the Universe from the inflationary era through today and
demonstrate that most of the observed phenomena beyond the Standard Model can
be explained within the framework of this model. We review the mechanism of
baryon asymmetry of the Universe in the nuMSM and discuss a dark matter
candidate that can be warm or cold and satisfies all existing constraints. From
the viewpoint of particle physics the model provides an explanation for
neutrino flavor oscillations. Verification of the nuMSM is possible with
existing experimental techniques.

7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
2
The categories of this paper are: math
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ