Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-11-18
Phys.Lett.B697:37-40,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages. Version 2: Final Phys. Lett. B version, includes further discussion of singlet scalar
Scientific paper
10.1016/j.physletb.2011.01.028
We discuss models where the Higgs boson of the electroweak standard model plays the role of the inflaton. We focus on the question of the violation of perturbative unitarity due to the coupling of the Higgs boson either to the Ricci scalar or to the Einstein tensor and discuss the background dependence of the unitarity bounds. Our conclusion is that the simplest model which restricts itself to the standard model Higgs boson without introducing further degrees of freedom has a serious problem. However, in the asymptotically safe gravity scenario, the Higgs boson of the standard model could be the inflaton and no physics beyond the standard model is required to explain both inflation and the spontaneous breaking of the electroweak symmetry of the standard model.
Atkins Michael
Calmet Xavier
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