A novel way to determine the scale of inflation

Show full item record



Permalink

http://hdl.handle.net/10138/307212

Citation

Enqvist , K , Hardwick , R J , Tenkanen , T , Vennin , V & Wands , D 2018 , ' A novel way to determine the scale of inflation ' , Journal of Cosmology and Astroparticle Physics , vol. 2018 , no. 2 , 006 . https://doi.org/10.1088/1475-7516/2018/02/006

Title: A novel way to determine the scale of inflation
Author: Enqvist, Kari; Hardwick, Robert J.; Tenkanen, Tommi; Vennin, Vincent; Wands, David
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Queen Mary Univ London, Queen Mary University London, University of London, Astron Unit, Sch Math Sci
Date: 2018-02
Language: eng
Number of pages: 25
Belongs to series: Journal of Cosmology and Astroparticle Physics
ISSN: 1475-7516
URI: http://hdl.handle.net/10138/307212
Abstract: We show that in the Feebly Interacting Massive Particle (FIMP) model of Dark Matter (DM), one may express the inflationary energy scale H-* as a function of three otherwise unrelated quantities, the DM isocurvature perturbation amplitude, its mass and its self-coupling constant, independently of the tensor-to-scalar ratio. The FIMP model assumes that there exists a real scalar particle that alone constitutes the DM content of the Universe and couples to the Standard Model via a Higgs portal. We consider carefully the various astrophysical, cosmological and model constraints, accounting also for variations in inflationary dynamics and the reheating history, to derive a robust estimate for H-* that is con fined to a relatively narrow range. We point out that, within the context of the FIMP DM model, one may thus determine H-* reliably even in the absence of observable tensor perturbations.
Subject: cosmology of theories beyond the SM
dark matter theory
inflation
particle physics - cosmology connection
INTERACTING DARK-MATTER
ENERGY-MOMENTUM TENSOR
GAUGE SINGLET SCALARS
REHEATING TEMPERATURE
PHASE-TRANSITION
UNIVERSE
VACUUM
THERMALIZATION
FLATNESS
HORIZON
115 Astronomy, Space science
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
1711.07344.pdf 2.216Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record