Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Improved scenario of baryogenesis   It is assumed that, in the primordial plasma, at the temperatures above the
mass of electron, fermions are in the neutral state being the superposition of
particle and antiparticle. There exists neutral proton-electron symmetry.
Proton-electron equilibrium is defined by the proton-electron mass difference.
At the temperature equal to the mass of electron, pairs of neutral electrons
annihilate into photons, and pairs of neutral protons and electrons survive as
protons and electrons.

0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
9
The categories of this paper are: nlin
18
The categories of this paper are: econ