Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inflation, (P)reheating and Neutrino Anomalies: Production of Sterile
  Neutrinos with Secret Interactions   A number of experimental anomalies involving neutrinos hint towards the
existence of at least an extra (a very light) sterile neutrino. However, such a
species, appreciably mixing with the active neutrinos, is disfavored by
different cosmological observations like Big Bang Nucleosynthesis (BBN), Cosmic
Microwave Background (CMB) and Large Scale Structure (LSS). Recently, it was
shown that the presence of additional interactions in the sterile neutrino
sector via light bosonic mediators can make the scenario cosmologically viable
by suppressing the production of the sterile neutrinos from active neutrinos
via matter-like effect caused by the mediator. This mechanism works assuming
the initial population of this sterile sector to be negligible with respect to
that of the Standard Model (SM) particles, before the production from active
neutrinos. However, there is fair chance that such bosonic mediators may couple
to the inflaton and can be copiously produced during (p)reheating epoch.
Consequently, they may ruin this assumption of initial small density of the
sterile sector. In this article we, starting from inflation, investigate the
production of such a sterile sector during (p)reheating in a large field
inflationary scenario and identify the parameter region that allows for a
viable early Universe cosmology.

28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin