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arXiv · 2008.09639

Dynamical Inflection Point Inflation

Yang Bai·Daniel Stolarski
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Abstract

We provide a mechanism to obtain multiple inflection points for the inflaton potential based on the Coleman-Weinberg potential. The key ingredient is the existence of zeros of the inflaton quartic coupling beta function, which can be simply realized by a sign change of a gauge coupling beta function at a massive threshold scale in gauge-Yukawa models. A universal inflaton potential emerges for a wide range of models and can accommodate the experimental data in the small-field inflation scenario. While the ratio of tensor over scalar amplitudes is predicted to be small, the running of the scalar spectral index, $\alpha_s$, has branches with both positive and negative values. The positive branch with $\alpha_s \gtrsim 0.002$ will be tested by the coming cosmic microwave background experiments.

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Yang Bai, Daniel Stolarski. 2020-08-21. Dynamical Inflection Point Inflation. https://doi.org/10.1088/1475-7516%2F2021%2F03%2F091

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