Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bounds on sterile neutrino lifetime and mixing angle with active
  neutrinos by global 21 cm signal   Sterile neutrinos can be a possible candidate for dark matter. Sterile
neutrinos are radiatively unstable and can inject photon energy into the
intergalactic medium (IGM). The injection of photon energy into IGM can modify
the temperature and ionization history of IGM gas during cosmic dawn.
Theoretical models based on the {\Lambda}CDM framework predict an absorption
profile in the 21 cm line during the cosmic dawn era. Recently, the Experiment
to Detect the Global Epoch of Reionization Signature (EDGES) collaboration
confirmed such an adsorption signal. Injection of energy into IGM can modify
the absorption amplitude in the 21 cm signal. Considering the 21 cm absorption
signal at cosmic dawn, we constrain the lifetime of sterile neutrinos and the
mixing angle of sterile neutrinos with active neutrinos. We also compare these
bounds with other astrophysical observational bounds.

22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg