Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hidden quantum-mechanical supersymmetry in extra dimensions   We study higher dimensional field theories with extra dimensions from a 4d
spectrum point of view. It is shown that 4d mass spectra of spinor, gauge and
gravity field theories are governed by quantum-mechanical supersymmetry. The 4d
massless modes turn out to correspond to zero energy vacuum states of the
supersymmetry. Allowed boundary conditions on extra dimensions compatible with
the supersymmetry are found to be severely restricted.

12
The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-fin