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Light inflaton completing Higgs inflation
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We consider the extension of the Standard Model (SM) with a light inflaton where both unitarity problem in Higgs inflation and vacuum instability problem are resolved. The linear non-minimal coupling of the inflaton to gravity leads to a significant kinetic mixing between the inflaton and the graviton such that perturbative unitarity is restored up to Planck scale. We show the correlation between unitarity scale and inflationary observables in this model and discuss how the effective Higgs inflation appears.
Forward citations
Cited by 2 Pith papers
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Torsion induced current-scalaron coupling in Einstein-Cartan gravity
In Einstein-Cartan gravity, torsion-current couplings induce scalaron-current and scalaron Chern-Simons interactions, with explicit decay constants and a classification of their asymptotic behavior.
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A four-form flux that couples both to a pseudo-scalar inflaton and to gravity produces a plateau inflaton potential whose spectral index and tensor-to-scalar ratio agree with current CMB data.
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