Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Sun at GeV--TeV Energies: A New Laboratory for Astroparticle Physics   The Sun is an excellent laboratory for astroparticle physics but remains
poorly understood at GeV--TeV energies. Despite the immense relevance for both
cosmic-ray propagation and dark matter searches, only in recent years has the
Sun become a target for precision gamma-ray astronomy with the Fermi-LAT
instrument. Among the most surprising results from the observations is a hard
excess of GeV gamma-ray flux that strongly anti-correlates with solar activity,
especially at the highest energies accessible to Fermi-LAT. Most of the
observed properties of the gamma-ray emission cannot be explained by existing
models of cosmic-ray interactions with the solar atmosphere. GeV--TeV gamma-ray
observations of the Sun spanning an entire solar cycle would provide key
insights into the origin of these gamma rays, and consequently improve our
understanding of the Sun's environment as well as the foregrounds for new
physics searches, such as dark matter. These can be complemented with new
observations with neutrinos and cosmic rays. Together these observations make
the Sun a new testing ground for particle physics in dynamic environments.

26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
2
The categories of this paper are: math
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
17
The categories of this paper are: q-fin