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Matching and running sensitivity in non-renormalizable inflationary models
- Source :
- Journal of High Energy Physics, Vol 2020, Iss 9, Pp 1-34 (2020), JHEP, JHEP, 2020, 09, pp.114. ⟨10.1007/JHEP09(2020)114⟩, Journal of High Energy Physics
- Publication Year :
- 2020
- Publisher :
- SpringerOpen, 2020.
-
Abstract
- Most of the inflationary models that are in agreement with the Planck data rely on the presence of non-renormalizable operators. If the connection to low energy particle physics is made, the renormalization group (RG) introduces a sensitivity to ultraviolet (UV) physics that can be crucial in determining the inflationary predictions. We analyse this effect for the Standard Model (SM) augmented with non-minimal derivative couplings to gravity. Our set-up reduces to the SM for small values of the Higgs field, and allows for inflation in the opposite large field regime. The one-loop beta functions in the inflationary region are calculated using a covariant approach that properly accounts for the non-trivial structure of the field space manifold. We run the SM parameters from the electroweak to the inflationary scale, matching the couplings of the different effective field theories at the boundary between the two regimes, where we also include threshold corrections that parametrize effects from UV physics. We then compute the spectral index and tensor-to-scalar ratio and find that RG flow corrections can be determinant: a scenario that is ruled out at tree level can be resurrected and vice versa.<br />Comment: 35 pages, 5 figures
- Subjects :
- High Energy Physics - Theory
power spectrum
threshold: correction
coupling: derivative
01 natural sciences
High Energy Physics - Phenomenology (hep-ph)
effective field theory
ultraviolet
energy: low
Physics
[PHYS.HTHE]Physics [physics]/High Energy Physics - Theory [hep-th]
Electroweak interaction
Effective Field Theories
Cosmology of Theories beyond the SM
inflation: model
High Energy Physics - Phenomenology
Higgs field
operator: nonrenormalizable
covariance
symbols
renormalization group: flow
Astrophysics - Cosmology and Nongalactic Astrophysics
Nuclear and High Energy Physics
scale: inflation
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
satellite: Planck
Higgs Physics
Field (physics)
FOS: Physical sciences
determinant
Standard Model
beta function
Theoretical physics
symbols.namesake
0103 physical sciences
tree approximation
Covariant transformation
Renormalization Group
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
structure
Planck
010306 general physics
Inflation (cosmology)
electroweak interaction
010308 nuclear & particles physics
Renormalization group
sensitivity
High Energy Physics - Theory (hep-th)
gravitation
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
lcsh:QC770-798
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Subjects
Details
- Language :
- English
- ISSN :
- 10298479
- Volume :
- 2020
- Issue :
- 9
- Database :
- OpenAIRE
- Journal :
- Journal of High Energy Physics
- Accession number :
- edsair.doi.dedup.....ca010ac21d57fd2d1fb1a660cee26ff6