Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5081
Title: Higgs-Palatini inflation and unitarity
Authors: Bauer, Florian
Demir, Durmuş Ali
Keywords: Higgs inflation
Palatini formalism
Unitarity
Issue Date: Apr-2011
Publisher: Elsevier Ltd.
Source: Bauer, F., and Demir, D. A. (2011). Higgs-Palatini inflation and unitarity. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 698(5), 425-429. doi:10.1016/j.physletb.2011.03.042
Abstract: In the Higgs inflation scenario the Higgs field is strongly coupled to the Ricci scalar in order to drive primordial inflation. However, in its original form in pure metric formulation of gravity, the ultraviolet (UV) cutoff of the Higgs interactions and the Hubble rate are of the same magnitude, and this makes the whole inflationary evolution dependent of the unknown UV completion of the Higgs sector. This problem, the unitarity violation, plagues the Higgs inflation scenario. In this Letter we show that, in the Palatini formulation of gravitation, Higgs inflation does not suffer from unitarity violation since the UV cutoff lies parametrically much higher than the Hubble rate so that unknown UV physics does not disrupt the inflationary dynamics. Higgs-Palatini inflation, as we call it, is, therefore, UV-safe, minimal and endowed with predictive power.
URI: https://doi.org/10.1016/j.physletb.2011.03.042
http://hdl.handle.net/11147/5081
ISSN: 0370-2693
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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