Distinguishing between R2-inflation and Higgs-inflation

The Relation Between Inflation and Inflation Uncertainty In Iran

Inflection-point Higgs Inflation

Inflection-point inflation is an interesting possibility to realize a successful slow-roll inflation when inflation is driven by a single scalar field with its initial value below the Planck mass (φI . MP l). In order for a renormalization group (RG) improved effective λφ4 potential to develop an inflection-point, the quartic coupling λ(φ) must exhibit a minimum with an almost vanishing value i...

Higgs Dynamics during Inflation

With the discovery of the Higgs boson, and recent measurements from the BICEP2 collaboration indicating a tensor-to-scalar ratio of r = 0.20 −0.05[1], particle physics is now in an interesting position. The most precise measurements of the Higgs boson and top quark masses appear to show that the Electroweak vacuum is unstable under the fluctuations produced by inflation at the energy scale the ...

Distinguishing Causal Seeds from Inflation

Causal seed models, such as cosmological defects, generically predict a distinctly different structure to the CMB power spectrum than inflation, due to the behavior of the perturbations outside the horizon. We provide a general analysis of their causal generation from isocurvature initial conditions by analyzing the role of stress perturbations and conservation laws in the causal evolution. As ...

Multifield dynamics of Higgs inflation

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Higgs inflation is a simple and elegant model in which early-universe inflation is driven by the Higgs sector of th...