| Article | |
| Report number | arXiv:1906.08697 ; CERN-TH-2019-091 ; INR-TH-2019-012 ; TTK-19-22 |
| Title | Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features |
| Author(s) | Vasudevan, Anagha (Bohr Inst.) ; Ivanov, Mikhail M. (New York U., CCPP ; Moscow, INR) ; Sibiryakov, Sergey (Moscow, INR ; EPFL, Lausanne, LPPC ; CERN) ; Lesgourgues, Julien (RWTH Aachen U.) |
| Publication | 2019-09-19 |
| Imprint | 2019-06-20 |
| Number of pages | 40 |
| Note | 39 pages, 7 figures, minor revision, published version |
| In: | JCAP 1909 (2019) 037 |
| DOI | 10.1088/1475-7516/2019/09/037 (publication) |
| Subject category | hep-th ; Particle Physics - Theory ; hep-ph ; Particle Physics - Phenomenology ; astro-ph.CO ; Astrophysics and Astronomy |
| Abstract | We extend the formalism of time-sliced perturbation theory (TSPT) for cosmological large-scale structure to include non-Gaussian initial conditions. We show that in such a case the TSPT interaction vertices acquire new contributions whose time-dependence factorizes for the Einstein-de Sitter cosmology. The new formulation is free from spurious infrared (IR) enhancements and reveals a clear IR structure of non-Gaussian vertices. We use the new technique to study the evolution of oscillating features in primordial statistics and show that they are damped due to non-linear effects of large bulk flows. We derive the damping factors for the oscillating primordial power spectrum and bispectrum by means of a systematic IR resummation of relevant Feynman diagrams. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) |
Corresponding record in: Inspire
ჩანაწერი შექმნილია 2019-06-22, ბოლოს შესწორებულია 2023-10-04
