Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Observable spectral and angular distributions of $\gamma$-rays from
  extragalactic ultrahigh energy cosmic ray accelerators: the case of extreme
  TeV blazars   Ultrahigh energy protons and nuclei from extragalactic cosmic ray sources
initiate intergalactic electromagnetic cascades, resulting in observable fluxes
of $\gamma$-rays in the GeV-TeV energy domain. The total spectrum of such
cascade $\gamma$-rays of hadronic nature is significantly harder than the one
usually expected from blazars. The spectra of some sources known as "extreme
TeV blazars" could be well-described by this "intergalactic hadronic cascade
model" (IHCM). We calculate the shape of the observable point-like spectrum, as
well as the observable angular distibution of $\gamma$-rays, for the first time
taking into account the effect of primary proton deflection in filaments and
galaxy clusters of the extragalactic magnetic field assuming the model of Dolag
et al. (2005). We present estimates of the width of the observable $\gamma$-ray
angular distribution derived from simple geometrical considerations. We also
employ a hybrid code to compute the observable spectral and angular
distributions of $\gamma$-rays. The observable point-like spectrum at multi-TeV
energies is much softer than the one averaged over all values of the observable
angle. The presence of a high-energy cutoff in the observable spectra of
extreme TeV blazars in the framework of the IHCM could significantly facilitate
future searches of new physics processes that enhance the apparent $\gamma$-ray
transparency of the Universe (for instance, $\gamma \rightarrow ALP$
oscillations). The width of the observable angular distribution is greater than
or comparable to the extent of the point spread function of next-generation
$\gamma$-ray telescopes.

12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol