Higgs inflation in Gauss-Bonnet braneworld

Abstract

The measured masses of the Higgs boson and top quark indicate that the effective potential of the standard model either develops an unstable electroweak vacuum or stands stable all the way up to the Planck scale. In the latter case in which the top quark mass is about $2\sigma$ below its present central value, the Higgs boson can be the inflaton with the help of a large nonminimal coupling to curvature in four dimensions. We propose a scenario in which the Higgs boson can be the inflaton in a five-dimensional Gauss-Bonnet braneworld model to solve both the unitarity and stability problems which usually plague Higgs inflation. We find that in order for Higgs inflation to happen successfully in the Gauss-Bonnet regime, the extra dimension scale must appear roughly in the range between the TeV scale and the instability scale of standard model. At the tree level, our model can give rise to a naturally small nonminimal coupling $\xi \sim \mathcal{O}(1)$ for the Higgs quartic coupling $\lambda \sim \mathcal{O}(0.1)$ if the extra dimension scale lies at the TeV scale. At the loop level, the inflationary predictions at the tree level are preserved. Our model can be confronted with future experiments and observations from both particle physics and cosmology.

v1,12 pages,6 figures; v2,final version to match the published version,12 pages,6 figures

References in corpus (19)

• The Standard Model Higgs boson as the inflaton
• Higgs inflation: consistency and generalisations
• Power-counting and the Validity of the Classical Approximation During Inflation
• On Inflation with Non-minimal Coupling
• Higgs inflation at the critical point
• Higgs inflation still alive
• Unitarizing Higgs Inflation
• Higgs inflation from Standard Model criticality
• A Unitarity-Conserving Higgs Inflation Model
• Higgs Gravitational Interaction, Weak Boson Scattering, and Higgs Inflation in Jordan and Einstein Frames
• Reheating phase diagram for single-field slow-roll inflationary models
• Extending Higgs Inflation with TeV Scale New Physics
• Is Higgs Inflation Dead?
• Higgs Boson Mass Bounds in the Standard Model with Type III and Type I Seesaw
• Higgs inflation with singlet scalar dark matter and right-handed neutrino in light of BICEP2
• Gauss-Bonnet gravity, brane world models, and non-minimal coupling
• Asymptotically Safe Higgs Inflation
• Higgs Boson in RG running Inflationary Cosmology
• Gauss-Bonnet assisted braneworld inflation in light of BICEP2 and Planck data

Cited by in corpus (7)

• Higgs inflation
• Low Scale Higgs Inflation with Gauss-Bonnet Coupling
• Higgs Inflation, Reheating and Gravitino Production in No-Scale Supersymmetric GUTs
• Exact Inflation in Einstein-Gauss-Bonnet Gravity
• Constraints on brane inflation after Planck 2015: Impacts of the latest local measurement of the Hubble constant
• Lower tensor to scalar ratio in a SUGRA motivated inflationary potential
• Causal cosmology with braneworld gravity including Gauss Bonnet coupling