TY  - EJOUR
AU  - Ema, Yohei
TI  - Dynamical Emergence of Scalaron in Higgs Inflation
IS  - arXiv:1907.00993
M1  - PUBDB-2019-02661
M1  - arXiv:1907.00993
M1  - DESY-19-117
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)25 ; PUB:(DE-HGF)29
DO  - DOI:10.3204/PUBDB-2019-02661
UR  - https://bib-pubdb1.desy.de/record/423784
ER  -