Higgs-portal assisted Higgs inflation with a sizeable tensor-to-scalar ratio

Abstract

We show that the Higgs portal interactions involving extra dark Higgs field can save generically the original Higgs inflation of the standard model (SM) from the problem of a deep non-SM vacuum in the SM Higgs potential. Specifically, we show that such interactions disconnect the top quark pole mass from inflationary observables and allow multi-dimensional parameter space to save the Higgs inflation, thanks to the additional parameters (the dark Higgs boson mass $m_{\varphi }$, the mixing angle $\alpha$ between the SM Higgs $H$ and dark Higgs $\Phi$, and the mixed quartic coupling) affecting RG-running of the Higgs quartic coupling. The effect of Higgs portal interactions may lead to a larger tensor-to-scalar ratio, $0.08\lesssim r\lesssim 0.1$, by adjusting relevant parameters in wide ranges of $\alpha$ and $m_{\varphi }$, some region of which can be probed at future colliders. Performing a numerical analysis we find an allowed region of parameters, matching the latest Planck data.

v4: analysis improved, version published in JCAP

References in corpus (23)

• Planck 2015 results. XIII. Cosmological parameters
• The Standard Model Higgs boson as the inflaton
• Results from a search for dark matter in the complete LUX exposure
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• Higgs inflation at the critical point
• Higgs inflation still alive
• Living beyond the edge: Higgs inflation and vacuum metastability
• Standard Model-Axion-Seesaw-Higgs Portal Inflation. Five problems of particle physics and cosmology solved in one stroke
• Scale invariant extension of the standard model with strongly interacting hidden sector
• Self-interacting scalar dark matter with local $Z_3$ symmetry
• $\nu \Lambda$MDM: A Model for Sterile Neutrino and Dark Matter Reconciles Cosmological and Neutrino Oscillation Data after BICEP2
• Search for narrow resonances and quantum black holes in inclusive and b-tagged dijet mass spectra from pp collisions at sqrt(s) = 7 TeV
• Two-loop electroweak threshold corrections in the Standard Model
• Quantum corrections in Higgs inflation: the Standard Model case
• mr: a C++ library for the matching and running of the Standard Model parameters
• Search for exotic resonances decaying into WZ/ZZ in pp collisions at sqrt(s) = 7 TeV
• A Strong Electroweak Phase Transition from the Inflaton Field
• Higgs inflation with singlet scalar dark matter and right-handed neutrino in light of BICEP2
• Indirect and direct signatures of Higgs portal decaying vector dark matter for positron excess in cosmic rays
• Self-unitarization of New Higgs Inflation and compatibility with Planck and BICEP2 data
• Multifield dynamics of supersymmetric Higgs inflation in SU(5) GUT
• Testing supersymmetric Higgs inflation with non-Gaussianity
• Limits on Entanglement Effects in the String Landscape from Planck and BICEP/Keck Data

Cited by in corpus (16)

• Galactic center $\gamma$-ray excess in hidden sector DM models with dark gauge symmetries: local $Z_3$ symmetry as an example
• Overshooting, Critical Higgs Inflation and Second Order Gravitational Wave Signatures
• Dark Higgs Bosons at Colliders
• Models of LHC Diphoton Excesses Valid up to the Planck scale
• Simplified DM models with the full SM gauge symmetry : the case of $t$-channel colored scalar mediators
• Vanishing Higgs Potential in Minimal Dark Matter Models
• Cosmological implications of Standard Model criticality and Higgs inflation
• Inflection-point Inflation and Dark Matter Redux
• MSSM-inspired multifield inflation
• Connecting between inflation and dark matter in models with gauged $Z_3$ symmetry
• Nonminimally Assisted Inflation: A General Analysis
• Non-minimal Coupling Inflation and Dark Matter under the ${\mathbb{Z}}_3$ Symmetry
• Inflation and Dark Matter in the $Z_5$ Model
• Addendum to "Invisible Higgs decay width versus dark matter direct detection cross section in Higgs portal dark matter models"
• Chaotic initial conditions for nonminimally coupled inflation via a conformal factor with a zero
• Search for dark Higgs inflaton with curvature couplings at LHC experiments