Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cascading Gravity is Ghost Free   We perform a full perturbative stability analysis of the 6D cascading gravity
model in the presence of 3-brane tension. We demonstrate that for sufficiently
large tension on the (flat) 3-brane, there are no ghosts at the perturbative
level, consistent with results that had previously only been obtained in a
specific 5D decoupling limit. These results establish the cascading gravity
framework as a consistent infrared modification of gravity.

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The categories of this paper are: funct-an
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: econ
16
The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs