Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accelerating universe in brane gravity with a confining potential   We construct the Einstein field equations on a 4-dimensional brane embedded
in an $m$-dimensional bulk where the matter fields are confined to the brane by
means of a confining potential. As a result, an extra term in the Friedmann
equation in a $m$-dimensional bulk appears that may be interpreted as the
X-matter, providing a possible phenomenological explanation for the
acceleration of the universe. The study of the relevant observational data
suggests good agreement with the predictions of this model.

1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph