Higgs portal valleys, stability and inflation

作者: Guillermo Ballesteros , Carlos Tamarit

DOI: 10.1007/JHEP09(2015)210

关键词:

摘要: The measured values of the Higgs and top quark masses imply that Standard Model potential is very likely to be unstable at large values. This particularly problematic during inflation, which sources perturbations Higgs. instability could cured by a threshold effect induced scalar with vacuum expectation value directly connected through portal coupling. However, we find in minimal model generates this mechanism does not stabilize because mass required for inflation beyond scale. conclusion change if has direct weak coupling curvature. On other hand, absolutely stable, successful agreement current CMB data can occur along valley Mexican hat profile. We revisit stability conditions, independently clarify cannot work too small. also show false appearing radiatively tuned ratio leads an amplitude primordial gravitational waves far high, ruling out possibility.

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