Non-Gaussianity from Particle Production during Inflation
Author
Source
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-40, 40 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-08-30
Country of Publication
Egypt
No. of Pages
40
Main Subjects
Abstract EN
In a variety of models the motion of the inflaton may trigger the production of some non-inflaton particles during inflation, for example via parametric resonance or a phase transition.
Such models have attracted interest recently for a variety of reasons, including the possibility of slowing the motion of the inflaton on a steep potential.
In this review we show that interactions between the produced particles and the inflaton condensate can lead to a qualitatively new mechanism for generating cosmological fluctuations from inflation.
We illustrate this effect using a simple prototype model g2(ϕ−ϕ0)2χ2 for the interaction between the inflaton, ϕ, and iso-inflaton, χ.
Such interactions are quite natural in a variety of inflation models from supersymmetry and string theory.
Using both lattice field theory and analytical calculations, we study the production of χ particles and their subsequent rescatterings off the condensate ϕ(t), which generates bremsstrahlung radiation of light inflaton fluctuations δϕ.
This mechanism leads to observable features in the primordial power spectrum.
We derive observational constraints on such features and discuss their implications for popular models of inflation.
Inflationary particle production also leads to a very novel kind of nongaussian signature which may be observable in future missions.
American Psychological Association (APA)
Barnaby, Neil. 2010. Non-Gaussianity from Particle Production during Inflation. Advances in Astronomy،Vol. 2010, no. 2010, pp.1-40.
https://search.emarefa.net/detail/BIM-450246
Modern Language Association (MLA)
Barnaby, Neil. Non-Gaussianity from Particle Production during Inflation. Advances in Astronomy No. 2010 (2010), pp.1-40.
https://search.emarefa.net/detail/BIM-450246
American Medical Association (AMA)
Barnaby, Neil. Non-Gaussianity from Particle Production during Inflation. Advances in Astronomy. 2010. Vol. 2010, no. 2010, pp.1-40.
https://search.emarefa.net/detail/BIM-450246
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-450246