Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: New limit on high Galactic latitude PeV gamma-ray flux from Tibet
  AS-gamma data   Tibet AS-gamma collaboration has recently reported detection of gamma-rays
with energies up to Peta-electronvolt from parts of the Galactic plane. We
notice that the analysis of gamma-ray flux by the Tibet AS-gamma experiment
also implies an upper bound on the diffuse gamma-ray flux from high Galactic
latitudes(|b|>20 degrees) in the energy range between 100 TeV and 1 PeV. This
bound is up to an order-of-magnitude stronger than previously derived bounds
from GRAPES3, KASCADE and CASA-MIA experiments. We discuss the new
TibetAS-gamma limit on high Galactic latitude gamma-ray flux in the context of
possible mechanisms of multi-messenger (gamma-ray and neutrino) emission from
nearby cosmic ray sources, dark matter decays and large scale cosmic ray halo
of the Milky Way.

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The categories of this paper are: eess
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The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: hep-ph
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The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: stat