Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Leptogenesis and Primordial Magnetic Fields   The anomalous conversion of leptons into baryons during leptogenesis is shown
to produce a right-handed helical magnetic field; in contrast, the magnetic
field produced during electroweak baryogenesis is known to be left-handed. If
the cosmological medium is turbulent, the magnetic field evolves to have a
present day coherence scale and field strength that are of astrophysical
interest. Observations of the amplitude, coherence scale, and helicity of the
intergalactic magnetic field promise to provide a powerful probe of physics
beyond the Standard Model and the very early universe.

32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg