Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simple fixed-brane gauges in $S_1/Z_2$ braneworlds   For five-dimensional braneworlds with an $S_1/\mathbb{Z}_2$ orbifold topology
for the extra dimension $x^5$, we discuss the validity of recent claims that a
gauge exists where the two boundary branes lie at fixed positions and the
metric satisfies $g_{\mu 5}=\partial_5 g_{55}=0$ where $\mu$ labels the
transverse dimensions. We focus on models where the bulk is empty apart from a
negative cosmological constant, which, in the case of cosmological symmetry,
implies the existence of a static frame with Schwarzschild-AdS geometry.
Considering the background case with the branes moving apart after a collision,
we show that such a gauge can be constructed perturbatively, expanding in
either the time after collision or the brane velocity. Finally we examine how
cosmological perturbations can be accommodated in such a gauge.

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The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: eess
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math