Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wigner's infinite spin representations and inert matter   Positive energy ray representations of the Poincar\'e group are naturally
subdivided into three classes according to their mass and spin content: m>0,
m=0 finite helicity and m=0 infinite helicity. For a long time the localization
properties of the massless infinite spin class remained unknown before it
became clear that such matter does not permit compact spactime localization and
its generating covariant fields are localized on semi-infinite spacelike
strings. Using a new perturbation theory for higher spin fields we show that
infinite spin matter cannot interact with normal matter and we formulate
condition under which this also could happen for finite spin s>1 fields. This
raises the question of a possible connection between inert matter and dark
matter.

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The categories of this paper are: plasm-ph
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: ao-sci