Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Complete density perturbations in the Jordan-Fierz-Brans-Dicke theory   In the context of scalar-tensor theories we study the evolution of the
density contrast for Jordan-Fierz-Brans-Dicke theories in a
Friedmann-Lemaitre-Robertson-Walker Universe. Calculations are performed in the
Einstein Frame with the cosmological background described as Lambda-Cold Dark
Matter (Lambda-CDM) and supplemented by a Jordan-Fierz-Brans-Dicke field. By
using a completely general procedure valid for all scalar-tensor theories, we
obtain the exact fourth-order differential equation for the density contrast
evolution in modes of arbitrary size. In the case of sub-Hubble modes, the
expression reduces to a simpler but still fourth-order equation that is then
compared with the standard (quasistatic) approximation. Differences with
respect to the evolution as predicted by the standard Concordance Lambda-CDM
model are observed depending on the value of the coupling.

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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
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The categories of this paper are: quant-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: eess
8
The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: q-fin