Theories where the Planck scale is dynamically generated from dimensionless interactions provide predictive inflationary potentials and super-Planckian field variations. We first study the minimal single field realisation in the low-energy effective field theory limit, finding the predictions n(s) approximate to 0.96 for the spectral index and r approximate to 0.13 for the tensor-toscalar ratio, which can be reduced down to approximate to 0.04 in presence of large couplings. Next we consider agravity as a dimensionless quantum gravity theory finding a multifield inflation that converges towards an attractor trajectory and predicts n(s) approximate to 0.96 and 0.003 < r < 0.13, interpolating between the quadratic and Starobinsky inflation. These theories relate the smallness of the weak scale to the smallness of inflationary perturbations: both arise naturally because of small couplings, implying a reheating temperature of 10(7-9) GeV. A measurement of r by Keck/Bicep3 would give us information on quantum gravity in the dimensionless scenario.

Kannike, K., Hutsi, G., Pizza, L., Racioppi, A., Raidal, M., Salvio, A., et al. (2015). Dynamically induced Planck scale and inflation. JOURNAL OF HIGH ENERGY PHYSICS, 2015(5) [10.1007/JHEP05(2015)065].

Dynamically induced Planck scale and inflation

Racioppi A.;Salvio A.;
2015

Abstract

Theories where the Planck scale is dynamically generated from dimensionless interactions provide predictive inflationary potentials and super-Planckian field variations. We first study the minimal single field realisation in the low-energy effective field theory limit, finding the predictions n(s) approximate to 0.96 for the spectral index and r approximate to 0.13 for the tensor-toscalar ratio, which can be reduced down to approximate to 0.04 in presence of large couplings. Next we consider agravity as a dimensionless quantum gravity theory finding a multifield inflation that converges towards an attractor trajectory and predicts n(s) approximate to 0.96 and 0.003 < r < 0.13, interpolating between the quadratic and Starobinsky inflation. These theories relate the smallness of the weak scale to the smallness of inflationary perturbations: both arise naturally because of small couplings, implying a reheating temperature of 10(7-9) GeV. A measurement of r by Keck/Bicep3 would give us information on quantum gravity in the dimensionless scenario.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/02
English
Cosmology of Theories beyond the SM; Renormalization Group
Kannike, K., Hutsi, G., Pizza, L., Racioppi, A., Raidal, M., Salvio, A., et al. (2015). Dynamically induced Planck scale and inflation. JOURNAL OF HIGH ENERGY PHYSICS, 2015(5) [10.1007/JHEP05(2015)065].
Kannike, K; Hutsi, G; Pizza, L; Racioppi, A; Raidal, M; Salvio, A; Strumia, A
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/230665
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