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Loop corrections and a new test of inflation
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2013 (English)In: Physical Review D, ISSN 1550-7998, Vol. 87, no 4, 043512- p.Article in journal (Refereed) Published
Abstract [en]

Inflation is the leading paradigm for explaining the origin of primordial density perturbations. However many open questions remain, in particular whether one or more scalar fields were present during inflation and how they contributed to the primordial density perturbation. We propose a new observational test of whether multiple fields or only one (not necessarily the inflaton) generated the perturbations. We show that our test, relating the bispectrum and trispectrum, is protected against loop corrections at all orders, unlike previous relations. DOI: 10.1103/PhysRevD.87.043512

Place, publisher, year, edition, pages
2013. Vol. 87, no 4, 043512- p.
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-88270DOI: 10.1103/PhysRevD.87.043512ISI: 000314685900007OAI: diva2:610807


Available from: 2013-03-13 Created: 2013-03-12 Last updated: 2013-03-13Bibliographically approved

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