Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 5, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1475-7516/2018/05/045
Keywords
non-gaussianity; CMBR experiments; inflation; physics of the early universe
Funding
- ASI [2016-24-H.0]
- ASI/INAF [1/072/09/0]
- National Taiwan University (NTU) [103R4000]
- NTU Leung Center for Cosmology and Particle Astrophysics (LeCosPA) [FI121]
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We develop a complete set of tools for CMB forecasting, simulation and estimation of primordial running bispectra, arising from a variety of curvaton and single-field (DBI) models of Inflation. We validate our pipeline using mock CMB running non-Gaussianity realizations and test it on real data by obtaining experimental constraints on the f(NL) running spectral index, n(NG), using WMAP 9-year data. Our final bounds (68% C.L.) read -0.6 < n(NG) < 1.4, -0.3 < n(NG) < 1.2, -1.1 < n(NG) < 0.7 for the single-field curvaton, two-field curvaton and DBI scenarios, respectively. We show forecasts and discuss potential improvements on these bounds, using Planck and future CMB surveys.
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