Unitarity-violation in Generalized Higgs Inflation Models

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.

14 pages. Some additional discussion. Version published in JCAP

References in corpus (11)

• The Standard Model Higgs boson as the inflaton
• Gauge Singlet Scalars as Cold Dark Matter
• Higgs inflation: consistency and generalisations
• Inflation scenario via the Standard Model Higgs boson and LHC
• Power-counting and the Validity of the Classical Approximation During Inflation
• On Inflation with Non-minimal Coupling
• Unitarizing Higgs Inflation
• Self-healing of unitarity in effective field theories and the onset of new physics
• A Unitarity-Conserving Higgs Inflation Model
• The Standard Model Higgs Boson-Inflaton and Dark Matter
• Late and early time phenomenology of Higgs-dependent cutoff

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