Higgs inflation and suppression of axion isocurvature perturbation
Kazunori Nakayama, Masahiro Takimoto
TL;DR
This paper shows that in the DFSZ axion model, large Higgs field values during inflation can relax constraints from axion isocurvature perturbations, aligning with Higgs inflation scenarios involving non-minimal couplings.
Contribution
It introduces a mechanism where large Higgs field values during inflation suppress axion isocurvature perturbations within the Higgs inflation framework.
Findings
Axion isocurvature constraints are relaxed with large Higgs field values.
Compatibility of DFSZ axion model with Higgs inflation is demonstrated.
Large Higgs field values during inflation suppress axion perturbations.
Abstract
We point out that cosmological constraint from the axion isocurvature perturbation is relaxed if the Higgs field obtains a large field value during inflation in the DFSZ axion model. This scenario is consistent with the Higgs inflation model, in which two Higgs doublets have non-minimal couplings and play a role of inflaton.
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