Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sterile neutrino dark matter via coinciding resonances   It has been proposed that two resonances could coincide in the early universe
at temperatures $T \sim 0.2 ... 0.5$ GeV: one between two nearly degenerate
GeV-scale sterile neutrinos, producing a large lepton asymmetry through
freeze-out and decays; another between medium-modified active neutrinos and
keV-scale sterile neutrinos, converting the lepton asymmetry into dark matter.
Making use of a framework which tracks three sterile neutrinos of both
helicities as well as three separate lepton asymmetries, and scanning the
parameter space of the GeV-scale species, we establish the degree of
fine-tuning that is needed for realizing this scenario.

15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci