Distinguishing between R^2-inflation and Higgs-inflation

Details Distinguishing between R^2-inflation and Higgs-inflation Distinguishing between R^2-inflation and Higgs-inflation

2011-11-18

arxiv.org/abs/1111.4397v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages

Scientific paper

We present three features which can be used to distinguish the Higgs-inflation from R^2-inflation with ongoing, upcoming and planned experiments. (i) Slightly different tilt of the scalar perturbation spectrum n_s and ratio r of scalar-to-tensor perturbation amplitudes. (ii) Gravity waves produced within R^2-model by collapsing, merging and evaporating scalaron clumps formed in the post-inflationary Universe. (iii) Different ranges of the possible Standard Model Higgs boson masses, where the electroweak vacuum remains stable while the Universe evolves after inflation. Specifically, in the R^2-model Higgs boson can be as light as 116 GeV. These effects mainly rely on the lower reheating temperature in the R^2-inflation.

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