Hybrid Higgs inflation: The use of disformal transformation

2017/12/20 by Seiga Sato, Kei-ichi Maeda · 1 citation
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Chemistry #Cosmology and Gravitation Theories #Econometrics #Economics #Geophysics and Gravity Measurements #Higgs boson #Inflation (cosmology) #Particle physics #Physics #Solar and Space Plasma Dynamics #Theoretical physics #Transformation (genetics) #astro-ph.CO #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.97.083512

published as Phys. Rev. D 97, 083512 (2018) · 16 pages, 6 figures, 1 table

arxiv created 2017/12/20 · openalex publication_date 2018/04/17 · arxiv updated 2018/04/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06

Abstract

We propose a hybrid type of the conventional Higgs inflation and new Higgs inflation models. We perform a disformal transformation into the Einstein frame and analyze the background dynamics and the cosmological perturbations in the truncated model, in which we ignore the higher-derivative terms of the Higgs field. From the observed power spectrum of the density perturbations, we obtain the constraint on the nonminimal coupling constant \ensuremathξ and the mass parameter M in the derivative coupling. Although the primordial tilt n_s in the hybrid model barely changes, the tensor-to-scalar ratio r moves from the value in the new Higgs inflationary model to that in the conventional Higgs inflationary model as |\ensuremathξ| increases. We confirm our results by numerical analysis by ADM formalism of the full theory in the Jordan frame.

Citations

• The development of irregularities in a single bubble inflationary universe
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