Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: TeV $\gamma$-ray fluxes from the long campaigns on Mrk421 as constraints
  on the emission of TeV-PeV Neutrinos and UHECRs   Long TeV $\gamma$-ray campaigns have been carried out to study the spectrum,
variability and duty cycle of the BL Lac object Markarian 421. These campaigns
have given some evidence of the presence of protons in the jet: i) Its spectral
energy distribution which shows two main peaks; one at low energies ($\sim$ 1
keV) and the other at high energies (hundreds of GeV), has been described by
using synchrotron proton blazar model. ii) The study of the variability at GeV
$\gamma$-rays and X-rays has indicated no significant correlation. iii) TeV
$\gamma$-ray detections without activity in X-rays, called "orphan flares" have
been observed in this object.\\ Recently, The Telescope Array Collaboration
reported the arrival of 72 ultra-high-energy cosmic rays with some of them
possibly related to the direction of Markarian 421. The IceCube Collaboration
reported the detection of 37 extraterrestrial neutrinos in the TeV - PeV energy
range collected during three consecutive years. In particular, no neutrino
track events were associated with this source. In this paper, we consider the
proton-photon interactions to correlate the TeV $\gamma$-ray fluxes reported by
long campaigns with the neutrino and ultra-high-energy cosmic ray observations
around this blazar. Considering the results reported by The IceCube and
Telescope Array Collaborations, we found that only from $\sim$ 25\% to 70\% of
TeV fluxes described with a power law function with exponential cutoff can come
from the proton-photon interactions.

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The categories of this paper are: stat
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ph
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The categories of this paper are: econ
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The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex