Self-healing of unitarity in Higgs inflation

Calmet, Xavier and Casadio, Roberto (2014) Self-healing of unitarity in Higgs inflation. Physics Letters B, 734. pp. 17-20. ISSN 0370-2693

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We reconsider perturbative unitarity violation in the standard model Higgs inflation model. We show that the Cutkosky cutting rule implied by perturbative unitarity is fulfilled at one-loop. This is a strong indication that unitarity is restored order by order in perturbation theory. We then resum certain one-loop diagrams and show that the relevant dressed amplitude fulfills the Cutkosky rule exactly. This is an example of the self-healing mechanism. The original Higgs inflation model is thus consistent and does not require any new physics beyond the standard model at least up to the Planck scale.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics > QC0801 Geophysics. Cosmic physics
Depositing User: Catrina Hey
Date Deposited: 09 Sep 2014 13:30
Last Modified: 02 Jul 2019 21:45

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Project NameSussex Project NumberFunderFunder Ref
Particle Physics Theory at Royal Holloway and SussexG0742STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/J000477/1