Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Stueckelberg Approach to Quadratic Curvature Gravity and its
  Decoupling Limits   Curvature squared terms, when added to the Einstein-Hilbert action and
treated non-perturbatively, generically result in the propagation of an extra
massive scalar state and an extra massive spin-2 ghost state. Using the
Stueckelberg trick, we study the high-energy limit in which the mass of the
spin-2 state is taken to zero, with strong- coupling scales held fixed. The
Stueckelberg approach makes transparent the interplay between the ghost
graviton and the healthy graviton which allows the theory to evade the usual
lambda-3 strong coupling scale of massive gravity and become renormalizable, at
the expense of stability.

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The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
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The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn