@Article{Norena_etal2012,
author="Norena, J.
and Verde, L.
and Barenboim, G.
and Bosch, C.",
title="Prospects for constraining the shape of non-Gaussianity with the scale-dependent bias",
journal="Journal of Cosmology and Astroparticle Physics",
year="2012",
publisher="Iop Publishing Ltd",
volume="08",
number="8",
pages="019--16pp",
optkeywords="redshift surveys; cosmological parameters from LSS; inflation",
abstract="We consider whether the non-Gaussian scale-dependent halo bias can be used not only to constrain the local form of non-Gaussianity but also to distinguish among different shapes. In particular, we ask whether it can constrain the behavior of the primordial three-point function in the squeezed limit where one of the momenta is much smaller than the other two. This is potentially interesting since the observation of a three-point function with a squeezed limit that does not go like the local nor equilateral templates would be a signal of non-trivial dynamics during inflation. To this end we use the quasi-single field inflation model of Chen {\&} Wang [1, 2] as a representative two-parameter model, where one parameter governs the amplitude of non-Gaussianity and the other the shape. We also perform a model-independent analysis by parametrizing the scale-dependent bias as a power-law on large scales, where the power is to be constrained from observations. We find that proposed large-scale structure surveys (with characteristics similar to the dark energy task force stage IV surveys) have the potential to distinguish among the squeezed limit behavior of different bispectrum shapes for a wide range of fiducial model parameters. Thus the halo bias can help discriminate between different models of inflation.",
optnote="WOS:000308800700020",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1189), last updated on Thu, 15 Nov 2012 12:25:12 +0000",
issn="1475-7516",
doi="10.1088/1475-7516/2012/08/019",
opturl="http://arxiv.org/abs/1204.6324",
opturl="https://doi.org/10.1088/1475-7516/2012/08/019",
archivePrefix="arXiv",
eprint="1204.6324",
language="English"
}