Preprint/Report

PUBDB-2019-02661

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Dynamical Emergence of Scalaron in Higgs Inflation

Ema, Y. (Corresponding author)DESY*

2019

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Please use a persistent id in citations: doi:10.3204/PUBDB-2019-02661

Report No.: DESY-19-117; arXiv:1907.00993

Abstract: We point out that a light scalaron dynamically emerges if scalar fields have a sizable non-minimal coupling to the Ricci scalar as in the Higgs inflation model. We support this claim in two ways. One is based on the renormalization group equation; the non-minimal coupling inevitably induces a Ricci scalar quadratic term due to the renormalization group running. The other is based on scattering amplitudes; a scalar four-point amplitude develops a pole after summing over a certain class of diagrams, which we identify as the scalaron. Our result implies that the Higgs inflation is actually a two-field inflationary model. Another implication is that the Higgs inflation does not suffer from the unitarity issue since the scalaron pushes up the cut-off scale to the Planck scale.

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2019

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Database coverage:
; Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Report/Journal Article Ema, Y. (Corresponding author)DESY*
Dynamical emergence of scalaron in Higgs inflation
Journal of cosmology and astroparticle physics 2019(09), 027 - 027 (2019) [10.1088/1475-7516/2019/09/027]2019     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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