Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: TeV String Theories, Mini Black Holes and Trans-GZK Cosmic Rays   We review the proposal that trans-GZK cosmic ray interactions are caused by
neutrino primaries. The primaries cause excitations of strings and give rise to
extensive air showers (EAS) resembling EAS induced by nuclei. We also show that
in ``low scale'' string models (of characteristic energy about 70TeV) the
excited string and the mini black hole pictures are equivalent.

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The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol