Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radio-to-gamma-ray synchrotron and neutrino emission from proton-proton
  interactions in active galactic nuclei   We explore possible physical origin of correlation between radio wave and
very-high-energy neutrino emission in active galactic nuclei (AGN), suggested
by recently reported evidence for correlation between neutrino arrival
directions and positions of brightest radio-loud AGN. We show that such
correlation is expected if both synchrotron emitting electrons and neutrinos
originate from decays of charged pions produced in proton-proton interactions
in parsec-scale relativistic jet propagating through circum-nuclear medium of
the AGN.

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The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: eess
5
The categories of this paper are: gr-qc
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The categories of this paper are: stat
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
3
The categories of this paper are: physics
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
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The categories of this paper are: nlin
17
The categories of this paper are: q-fin