Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superluminal neutrinos and the tachyon's stability in the rotating
  Universe   It is well-known that a hypothetical particle which moves faster than the
light, a \emph{tachyon}, is unstable in the Minkowski space-time. Here we shall
show that, contrary to the Minkowski case, the tachyon is stable in the
rotating Universe described by a family of the G\"{o}del-like solutions, unless
the absolute value of its mass is larger than some small constant which is
related to the universe`s rotation scale and is many orders less than the
electron`s mass. The smallness of this upper bound on the tachyon`s mass might
be an explanation why we do not observe heavy tachyons. Mathematically, the
stability bound is similar to the well-known Breitenlohner-Freedman bound for
the asymptotically anti-de Sitter (AdS) space-times.

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The categories of this paper are: cond-mat
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The categories of this paper are: supr-con
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The categories of this paper are: q-bio
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The categories of this paper are: math
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin