Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spinning dilaton black hole in 2+1 dimensions as a particle accelerator   In this paper we have studied particle collision around a spinning dilaton
black hole in 2 +1 dimensions. This black hole is a solution to the low energy
string theory in 2+1 dimensions. Time-like geodesics are presented in detail
and the center of mass energy of two particles collision at the horizon of a
spinning black hole is considered. We noticed that there is a possibility of
the two masses to create infinite center of mass energy.

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The categories of this paper are: eess
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The categories of this paper are: stat
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The categories of this paper are: q-fin
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The categories of this paper are: nlin
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The categories of this paper are: acc-phys
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The categories of this paper are: atom-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
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The categories of this paper are: physics
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The categories of this paper are: astro-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg