Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutrino-Antineutrino Asymmetry From The Space-time Noncommutativity   A new mechanism having as an origin the space-time noncommutativity has been
shown to generate anisotropy and axial-like interaction giving rise to a
leptonic asymmetry for fermionic particles propagating in a curved
noncommutative $FRW$ universe. As a by-product, for ultra-relativistic
particles like neutrinos, an analytical expression of this asymmetry is derived
explicitly. Constraints and bounds from the cosmological parameters are also
discussed.

12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas