The minimal curvaton-higgs model

Abstract

We present the first full study of the minimal curvaton-higgs (MCH) model, which is a minimal interpretation of the curvaton scenario with one real scalar coupled to the standard model Higgs boson. The standard model coupling allows the dynamics of the model to be determined in detail, including effects from the thermal background and from radiative corrections to the potential. The relevant mechanisms for curvaton decay are incomplete non-perturbative decay (delayed by thermal blocking), followed by decay via a dimension-5 non-renormalisable operator. To avoid spoiling the predictions of big bang nucleosynthesis, we find the "bare" curvaton mass to be m_σ> 8 x 10^4 GeV. To match observational data from Planck there is an upper limit on the curvaton-higgs coupling g, between 10^-3 and 10^-2, depending on the mass. This is due to interactions with the thermal background. We find that typically non-Gaussianities are small but that if fnl is observed in the near future then m_σ< 5 x 10^9 GeV, depending on Hubble scale during inflation. In a thermal dark matter model, the lower bound on m_σ can increase substantially. The parameter space may also be affected once the baryogenesis mechanism is specified.

10 pages; 5 figures; published version

References in corpus (11)

• Non-Gaussianity, Spectral Index and Tensor Modes in Mixed Inflaton and Curvaton Models
• Non-gaussianity from the second-order cosmological perturbation
• On Classification of Models of Large Local-Type Non-Gaussianity
• Generation of the Higgs Condensate and Its Decay after Inflation
• Hilltop Non-Gaussianity
• Fate of $Z_2$ Symmetric Scalar Field
• Runnings in the Curvaton
• Non-Gaussianity from Axionic Curvaton
• Curvaton Decay by Resonant Production of the Standard Model Higgs
• Non-Gaussianity and Gravitational Waves from Quadratic and Self-interacting Curvaton
• The TeV-mass curvaton

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• Comprehensive analysis of the simplest curvaton model
• Constraining Curvatonic Reheating
• The Higgs field and early universe cosmology: a (brief) review
• Measuring the duration of inflation with the curvaton
• Non-minimally coupled curvaton
• Curvaton Dynamics Revisited
• Thermal blocking of preheating
• The running curvaton
• Quantifying the 'naturalness' of the curvaton model
• Testing Inflationary Cosmology