Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Generation of Nonthermal Particles in the Relativistic Magnetic
  Reconnection of Pair Plasmas   Particle acceleration in the magnetic reconnection of electron-positron
plasmas is studied by using a particle-in-cell simulation. It is found that a
significantly large number of nonthermal particles are generated by the
inductive electric fields around an X-type neutral line when the reconnection
outflow velocity, which is known to be an Alfv\'{e}n velocity, is on the order
of the speed of light. In such a relativistic reconnection regime, we also find
that electrons and positrons form a power-law-like energy distribution through
their drift along the reconnection electric field under the relativistic
Speiser motion. A brief discussion of the relevance of these results to the
current sheet structure, which has an antiparallel magnetic field in
astrophysical sources of synchrotron radiation, is presented.

31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin