Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bulk Fields in the Randall-Sundrum Compactification Scenario   Recently, Randall and Sundrum proposed a solution to the hierarchy problem
where the background spacetime is five dimensional. There are two 3-branes, and
the mass scale for fields that propagate on one of the 3-branes is
exponentially suppressed relative to the fundamental scale of theory, which is
taken to be the Planck mass, M_Pl. In this letter we show that bulk fields with
a five dimensional mass term of order M_Pl have, after integrating over the
extra dimension, modes with four-dimensional masses that are exponentially
suppressed as well. This opens the possibility that in this scenario the
Standard Model matter fields may correspond to degrees of freedom that are not
confined to a 3-brane.

18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex