Higgs inflation still alive

Abstract

The observed value of the Higgs mass indicates that the Higgs potential becomes small and flat at the scale around $10^{17}$GeV. Having this fact in mind, we reconsider the Higgs inflation scenario proposed by Bezrukov and Shaposhnikov. It turns out that the non-minimal coupling $\xi$ of the Higgs-squared to the Ricci scalar can be smaller than ten. For example, $\xi =7$ corresponds to the tensor-to-scalar ratio $r\simeq 0.2$, which is consistent with the recent observation by BICEP2.

7 pages, 3 figures; Version to appear on Physical Review Letters, footnotes added and expanded, references added, note added (v2)

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• Embedding inflation into the Standard Model - more evidence for classical scale invariance
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• Reconstructing the inflationary $f(R)$ from observations
• Higgs-Dilaton cosmology: Universality vs. criticality
• Landau pole in the Standard Model with weakly interacting scalar fields
• Renormalization-group inflationary scalar electrodynamics and SU(5) scenarios confronted with Planck2013 and BICEP2 results
• Global stability analysis for cosmological models with non-minimally coupled scalar fields
• One-loop Modified Gravity in de Sitter Universe, Quantum Corrected Inflation, and its Confrontation with the Planck Result
• Extending Higgs Inflation with TeV Scale New Physics
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• Non-Minimal Two-Loop Inflation
• The Problem with False Vacuum Higgs Inflation
• Non-Abelian dynamics in the resonant decay of the Higgs after inflation
• Topological Higgs inflation: The origin of the Standard Model criticality
• Newton constant, contact terms and entropy
• Criticality and Inflation of the Gauged B-L Model
• Modified Lyth bound and implications of BICEP2 results
• Towards a Solution of the Negative Mode Problem in Quantum Tunnelling with Gravity
• Power Spectrum of Inflationary Attractors
• Natural Braneworld Inflation in Light of Recent Results from Planck and BICEP2
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• Anisotropy in Inflation with Non-minimal Coupling
• Higgs Mass and Gravity Waves in Standard Model False Vacuum Inflation
• Reconsideration of the Coleman's Baby Universe
• Large tensor-to-scalar ratio from Composite Inflation
• Multiple Point Principle of the Gauged B-L Model
• Radiative Inflation and Dark Energy RIDEs Again after BICEP2
• On the strong coupling scale in Higgs G-inflation
• How many new particles do we need after the Higgs boson?