Matter bispectrum in cubic Galileon cosmologies
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Date
2013
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Science
Abstract
In this paper we obtain the bispectrum of dark matter density perturbations in
the frame of covariant cubic Galileon theories. This result is obtained by means of a semi-
analytic approach to second-order perturbations in Galileon cosmologies, assuming Gaussian
initial conditions. In particular, we show that, even in the presence of large deviations of the
linear growth-rate w.r.t. the CDM one, at the bispectrum level such deviations are reduced
to a few percent.
Description
Keywords
Modi ed gravity, Galileon, Matter Bispectrum, Cosmological perturbations
Citation
Bartolo, N, et al. (2013). Matter bispectrum in cubic Galileon cosmologies. Journal of Cosmology and Astroparticle Physics, 34