Observational signatures of Higgs inflation

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http://hdl.handle.net/10138/166758

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Enckell , V-M , Enqvist , K & Nurmi , S 2016 , ' Observational signatures of Higgs inflation ' Journal of Cosmology and Astroparticle Physics , vol. 2016 , no. 07 , 047 . DOI: 10.1088/1475-7516/2016/07/047

Title: Observational signatures of Higgs inflation
Author: Enckell, Vera-Maria; Enqvist, Kari; Nurmi, Sami
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Department of Physics
University of Helsinki, Division of High Energy Physics (Department of Physics) (-2009)
Date: 2016-07
Language: eng
Number of pages: 17
Belongs to series: Journal of Cosmology and Astroparticle Physics
ISSN: 1475-7516
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
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