Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Estimation on the neutrino masses by using neutrino oscillation
  parameters   It has been shown that neutrino masses can be determined under the particle
ansatz. In this paper, we give the general formulas of neutrino masses related
to the neutrino oscillation parameters which show that there is a mass
hierarchy transition. Using the best fit values measured by electron and muon
neutrino oscillation experiments, the total neutrino mass is about 0.25 eV.
According to the standard neutrino cosmology, the neutrino energy density is
about 55 eV/cm$^3$ and $\Omega_m h^2>\Omega_\nu h^2\sim 0.0055$.

3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg