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Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features
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 cosmolo...
Autores principales: | , , , |
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Lenguaje: | eng |
Publicado: |
2019
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1088/1475-7516/2019/09/037 http://cds.cern.ch/record/2679492 |
_version_ | 1780962894419066880 |
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author | Vasudevan, Anagha Ivanov, Mikhail M. Sibiryakov, Sergey Lesgourgues, Julien |
author_facet | Vasudevan, Anagha Ivanov, Mikhail M. Sibiryakov, Sergey Lesgourgues, Julien |
author_sort | Vasudevan, Anagha |
collection | CERN |
description | 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. |
id | cern-2679492 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2019 |
record_format | invenio |
spelling | cern-26794922023-10-04T07:34:08Zdoi:10.1088/1475-7516/2019/09/037http://cds.cern.ch/record/2679492engVasudevan, AnaghaIvanov, Mikhail M.Sibiryakov, SergeyLesgourgues, JulienTime-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating featureshep-thParticle Physics - Theoryhep-phParticle Physics - Phenomenologyastro-ph.COAstrophysics and AstronomyWe 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.arXiv:1906.08697CERN-TH-2019-091INR-TH-2019-012TTK-19-22oai:cds.cern.ch:26794922019-06-20 |
spellingShingle | hep-th Particle Physics - Theory hep-ph Particle Physics - Phenomenology astro-ph.CO Astrophysics and Astronomy Vasudevan, Anagha Ivanov, Mikhail M. Sibiryakov, Sergey Lesgourgues, Julien Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features |
title | Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features |
title_full | Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features |
title_fullStr | Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features |
title_full_unstemmed | Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features |
title_short | Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features |
title_sort | time-sliced perturbation theory with primordial non-gaussianity and effects of large bulk flows on inflationary oscillating features |
topic | hep-th Particle Physics - Theory hep-ph Particle Physics - Phenomenology astro-ph.CO Astrophysics and Astronomy |
url | https://dx.doi.org/10.1088/1475-7516/2019/09/037 http://cds.cern.ch/record/2679492 |
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