Unitarity-violation in generalized Higgs inflation models

Lerner, Rose N. and McDonald, John (2012) Unitarity-violation in generalized Higgs inflation models. Journal of Cosmology and Astroparticle Physics, 2012 (11). ISSN 1475-7516

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Abstract

Unitarity-violation presents a challenge for non-minimally coupled models of inflation based on weak-scale particle physics. We examine the energy scale of tree-level unitarity-violation in scattering processes for generalized models with multiple scalar fields where the inflaton is either a singlet scalar or the Higgs. In the limit that the non-minimal couplings are all equal (e. g. in the case of Higgs or other complex inflaton), the scale of tree-level unitarity-violation matches the existing result. However if the inflaton is a singlet, and if it has a larger non-minimal coupling than other scalars in the model, then this hierarchy increases the scale of tree-level unitarity-violation. A sufficiently strong hierarchy pushes the scale of tree-level unitarity-violation above the Planck scale. We also discuss models which attempt to resolve the issue of unitarity-violation in Higgs Inflation.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Cosmology and Astroparticle Physics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3103
Subjects:
ID Code:
73277
Deposited By:
Deposited On:
12 Mar 2015 15:18
Refereed?:
Yes
Published?:
Published
Last Modified:
15 Jul 2020 04:51