Critical point Higgs inflation in the Palatini formulation

Show full item record



Permalink

http://hdl.handle.net/10138/333452

Citation

Enckell , V-M , Nurmi , S , Rasanen , S & Tomberg , E 2021 , ' Critical point Higgs inflation in the Palatini formulation ' , Journal of High Energy Physics , no. 4 , 59 . https://doi.org/10.1007/JHEP04(2021)059

Title: Critical point Higgs inflation in the Palatini formulation
Author: Enckell, Vera-Maria; Nurmi, Sami; Rasanen, Syksy; Tomberg, Eemeli
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
Date: 2021-04-08
Language: eng
Number of pages: 24
Belongs to series: Journal of High Energy Physics
ISSN: 1029-8479
URI: http://hdl.handle.net/10138/333452
Abstract: We study Higgs inflation in the Palatini formulation with the renormalisation group improved potential in the case when loop corrections generate a feature similar to an inflection point. Assuming that there is a threshold correction for the Higgs quartic coupling lambda and the top Yukawa coupling y(t), we scan the three-dimensional parameter space formed by the two jumps and the non-minimal coupling xi .The spectral index n(s) can take any value in the observationally allowed range. The lower limit for the running is alpha (s)> -3.5 x 10(-3), and alpha (s) can be as large as the observational upper limit. Running of the running is small. The tensor-to-scalar ratio is 2.2x10(-17)< r < 2 x 10(-5). We find that slow-roll can be violated near the feature, and a possible period of ultra-slow-roll contributes to the widening of the range of CMB predictions. Nevertheless, for the simplest tree-level action, the Palatini formulation remains distinguishable from the metric formulation even when quantum corrections are taken into account, because of the small tensor-to-scalar ratio.
Subject: Cosmology of Theories beyond the SM
Renormalization Group
AFFINE VARIATIONAL-PRINCIPLES
GENERAL-RELATIVITY
INITIAL CONDITIONS
BOSON
CONSTRAINTS
EINSTEIN
GRAVITATION
DISSIPATION
SCALARON
RIEMANN
114 Physical sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
Enckell2021_Art ... PointHiggsInflationInT.pdf 1.185Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record