The anisotropic power spectrum and bispectrum in the f (')F 2 mechanism
By N. Bartolo, S. Matarrese, Marco Peloso, A. Ricciardone. 2012
197 citations recorded by the source corpus.
a 1% (10%) anisotropy in the power spectrum corresponds to an anisotropic bispectrum which is enhanced like the local one in the squeezed limit, and with an eective local fNL 3 ( 30). More in general, a signicant anisotropy of the perturbations may be a natural outcome of all models that sustain higher than 0 spin elds during ination.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/370b81d5a195a6ef6b3f3a7805bf21146dc1f56b
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Citations in the corpus
- Planck 2015 results. XVII. Constraints on primordial non-Gaussianity (2015, unknown): “…is the case of a coupling of the inflaton field ϕ to the kinetic term of a gauge field Aµ, L contains −I2(ϕ)F2, where Fµν = ∂µAν − ∂νAµ and the coupling I2(ϕ)F2 is chosen so that scale invariant vector perturbations are produced on superhorizon scales (Barnaby et al. 2012b; Bartolo et al. 2013a).”
- Gauge fields and inflation (2012, background): “The authors in [120] pointed out quantum fluctuations of the electro-magnetic field are comparable to the classical background when c−1 is severely constrained by the observations.”
- Planck 2018 results. IX. Constraints on primordial non-Gaussianity (2019, background): “The so-called “solid inflation” models (Endlich et al. 2013; see also Bartolo et al. 2013b; Endlich et al. 2014; Sitwell & Sigurdson 2014; Bartolo et al. 2014) also predict bispectra of the form Eq.”