Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric Penrose process: high-energy acceleration of ionized particles
  by non-rotating weakly charged black hole   In many astrophysical scenarios the charge of the black hole is often
neglected due to unrealistically large values of the charge required for the
Reissner-Nordstr\"om spacetime metric. However, black holes may possess small
electric charge due to various selective accretion mechanisms. In this paper we
investigate the effect of a small hypothetical electric charge of a
Schwarzschild black hole on the ionization of a freely falling neutral particle
and subsequent escape of the ionized particle from the black hole. We show that
the energy of ionized particle can grow ultra-high and discuss distinguishing
signatures of particle acceleration by weakly charged black holes. We also
discuss a possible application of the proposed mechanism as an alternative
cosmic ray acceleration scenario. In particular we show that the Galactic
centre supermassive black hole is capable to act as a PeVatron of protons. The
presented mechanism can serve as a simple toy model of a non-rotating compact
object acting as a particle accelerator with a potential astrophysical
implementations related to the cosmic ray physics and beyond.

13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an