Higgs inflation with loop corrections in the Palatini formulation

Show full item record



Permalink

http://hdl.handle.net/10138/308150

Citation

Räsänen , S & Wahlman , P 2017 , ' Higgs inflation with loop corrections in the Palatini formulation ' , Journal of Cosmology and Astroparticle Physics , vol. 2017 , no. 11 , 047 . https://doi.org/10.1088/1475-7516/2017/11/047

Title: Higgs inflation with loop corrections in the Palatini formulation
Author: Räsänen, Syksy; Wahlman, Pyry
Other contributor: University of Helsinki, Department of Physics
University of Helsinki, Helsinki Institute of Physics

Date: 2017-11
Language: eng
Number of pages: 31
Belongs to series: Journal of Cosmology and Astroparticle Physics
ISSN: 1475-7516
DOI: https://doi.org/10.1088/1475-7516/2017/11/047
URI: http://hdl.handle.net/10138/308150
Abstract: We compare Higgs inflation in the metric and Palatini formulations of general relativity, with loop corrections treated in a simple approximation. We consider Higgs inflation on the plateau, at a critical point, at a hilltop and in a false vacuum. In the last case there are only minor differences. Otherwise we find that in the Palatini formulation the tensor-to-scalar ratio is consistently suppressed, spanning the range 1 x 10-(13) <r <7 x 10(-5), compared to the metric case result 2 x 10(-5) <r <0.2. Even when the values of n(s) and r overlap, the running and running of the running are different in the two formulations. Therefore, if Higgs is the inflaton, inflationary observables can be used to distinguish between different gravitational degrees of freedom, in this case to determine whether the connection is an independent variable. Non-detection of r in foreseeable future observations would not rule out Higgs inflation, only its metric variant. We conclude that in order to fix the theory of Higgs inflation, not only the particle physics UV completion but also the gravitational degrees of freedom have to be explicated.
Subject: inflation
particle physics - cosmology connection
gravity
STANDARD MODEL HIGGS
QUANTUM FLUCTUATIONS
GENERAL-RELATIVITY
SYMMETRY-BREAKING
CHAOTIC INFLATION
UNIVERSE SCENARIO
LOVELOCK GRAVITY
PHASE-TRANSITION
EINSTEIN TENSOR
DARK-MATTER
115 Astronomy, Space science
114 Physical sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
1709.07853.pdf 1.259Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record