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Hybrid Higgs Inflation: The Use of Disformal Transformation

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arxiv 1712.04237 v2 pith:MSO6MG26 submitted 2017-12-12 gr-qc astro-ph.COhep-phhep-th

Seiga Sato , Kei-ichi Maeda This is my paper · ORCID
classification gr-qcastro-ph.COhep-phhep-th
keywords higgsmodelhybridinflationconventionalcouplingdisformalframe
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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 non-minimal coupling constant $\xi$ 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 new Higgs inflationary model to that in the conventional Higgs inflationary model as $|\xi|$ increases. We confirm our results by numerical analysis by ADM formalism of the full theory in the Jordan frame.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Inflation with nondynamic distortion to leading order in slow roll

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    Nondynamic distortion integrated out of a 13-parameter metric-affine action sources the entire inflaton kinetic term; monomial models depend only on exponent ratio while α-attractors recover modified Starobinsky observables.

  2. Robustness of Starobinsky inflation in a minimal two-field scalar-tensor completion

    gr-qc 2026-04 unverdicted novelty 6.0 of 10

    Nearby trajectories in a minimal two-field scalar-tensor completion of Starobinsky inflation relax to an attractor where entropy sourcing is negligible, so observables remain effectively Starobinsky-like.

  3. Inflation with the Gauss-Bonnet term in the Palatini formulation

    astro-ph.CO 2026-03 accept novelty 5.0 of 10

    In Palatini gravity the inflaton–Gauss–Bonnet coupling yields a negative Chern–Simons-like kinetic correction and similar GW modifications, with metric-like behaviour unless the kinetic term nearly flips sign.

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