Electroweak-scale inflation, inflaton-Higgs mixing and the scalar spectral index

Details Electroweak-scale inflation, inflaton-Higgs mixing and the scalar spectral index Electroweak-scale inflation, inflaton-Higgs mixing and the scalar spectral index

2004-04-15

arxiv.org/abs/hep-ph/0404128v2

JCAP 0407 (2004) 003

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 4 figures. v2: Two references added, matches version to be published in JCAP

Scientific paper

10.1088/1475-7516/2004/07/003

We construct a phenomenological model of electroweak-scale inflation that is in accordance with recent cosmic microwave background observations by WMAP, while setting the stage for a zero-temperature electroweak transition as assumed in recent models of baryogenesis. We find that the scalar spectral index especially poses tight constraints for low-scale inflation models. The inflaton-Higgs coupling leads to substantial mixing of the scalar degrees of freedom. Two types of scalar particles emerge with decay widths similar to that of the Standard Model Higgs particle.

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