Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutrino Masses and Flavor Oscillations   This essay is intended to provide a brief description of the peculiar
properties of neutrinos within and beyond the standard theory of weak
interactions. The focus is on the flavor oscillations of massive neutrinos,
from which one has achieved some striking knowledge about their mass spectrum
and flavor mixing pattern. The experimental prospects towards probing the
absolute neutrino mass scale, possible Majorana nature and CP-violating effects
will also be addressed.

33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph