Enckell , V-M , Enqvist , K & Nurmi , S 2016 , ' Observational signatures of Higgs inflation ' , Journal of Cosmology and Astroparticle Physics , vol. 2016 , no. 07 , 047 . https://doi.org/10.1088/1475-7516/2016/07/047
Title: | Observational signatures of Higgs inflation |
Author: | Enckell, Vera-Maria; Enqvist, Kari; Nurmi, Sami |
Contributor organization: | Department of Physics Helsinki Institute of Physics |
Date: | 2016-07 |
Language: | eng |
Number of pages: | 17 |
Belongs to series: | Journal of Cosmology and Astroparticle Physics |
ISSN: | 1475-7516 |
DOI: | https://doi.org/10.1088/1475-7516/2016/07/047 |
URI: | http://hdl.handle.net/10138/166758 |
Abstract: | We investigate the dependency of Higgs inflation on the non-renormalisable matching between the low energy Standard Model limit and the inflationary regime at high energies. We show that for the top mass range m(t) greater than or similar to 171.8 GeV the scenario robustly predicts the spectral index n(s) similar or equal to 0.97 and the tensor-to-scalar ratio r similar or equal to 0.003. The matching is however non-trivial, even the best-fit values m(h) = 125.09 GeV and m(t) = 173.21 GeV require a jump delta lambda similar to 0.01 in the Higgs coupling below the inflationary scale. For m(t) less than or similar to 171.8 GeV, the matching may generate a feature in the inflationary potential. In this case the predicted values of n(s) and r vary but the model is still falsifiable. For example, a detection of negative running of spectral index at level alpha(s) less than or similar to -0.01 would rule out Higgs inflation. |
Subject: |
cosmology of theories beyond the SM
inflation particle physics - cosmology connection physics of the early universe INDUCED GRAVITY INFLATION STANDARD MODEL ELECTROWEAK VACUUM BOSON 115 Astronomy, Space science 114 Physical sciences |
Peer reviewed: | Yes |
Usage restriction: | closedAccess |
Self-archived version: | submittedVersion |
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