Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Can we live in the bulk without a brane?   We suggest a braneless scenario that still hides large-volume extra
dimensions. Ordinarily the strength of bulk gauge interactions would be diluted
over the large internal volume, making all the four dimensional forces weak. We
use the fact that if the gauge fields result from the dimensional reduction of
pure higher-dimensional gravity, then the strengths of the four dimensional
gauge interactions are related to the sizes of corresponding cycles averaged
over the compact internal manifold. Therefore, if a gauge force is concentrated
over a small cycle it will not be diluted over the entire manifold. Gravity,
however, remains diluted over the large volume. Thus large-volume, large mass
gap extra dimensions with small cycles can remain hidden and result in a
hierarchy between gravity and the other forces. However, problematically, the
cycles are required to be smaller than the higher-dimensional Planck length and
this raises concern over quantum gravity corrections. We speculate on possible
cures.

29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga