Journal
PHYSICS LETTERS B
Volume 697, Issue 1, Pages 37-40Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2011.01.028
Keywords
Higgs inflation; Perturbative unitarity; Asymptotic safety
Funding
- Science and Technology Facilities Council [ST/1506029/1]
- STFC [ST/F006977/1, ST/J000477/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F006977/1, ST/J000477/1] Funding Source: researchfish
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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. (C) 2011 Elsevier B.V. All rights reserved.
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