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000426508 1001_ $$0P:(DE-H253)PIP1086046$$aEma, Yohei$$b0$$eCorresponding author
000426508 245__ $$aDynamical emergence of scalaron in Higgs inflation
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000426508 520__ $$aWe 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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000426508 7870_ $$0PUBDB-2019-02661$$aEma, Yohei$$d2019$$iIsParent$$rarXiv:1907.00993; DESY-19-117$$tDynamical Emergence of Scalaron in Higgs Inflation
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