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Imprints of Spinning Particles on Primordial Cosmological Perturbations
Gabriele Franciolini, Alex Kehagias, Antonio Riotto
If there exist higher-spin particles during inflation which are light compared to the Hubble rate, they may leave distinct statistical anisotropic imprints on the correlators invol…
The Clockwork Supergravity
Alex Kehagias, Antonio Riotto
We show that the minimal D = 5, N = 2 gauged supergravity set-up may encode naturally the recently proposed clockwork mechanism. The minimal embedding requires one vector multiplet…
On the Catalysis of the Electroweak Vacuum Decay by Black Holes at High Temperature
D. Canko, I. Gialamas, G. Jelic-Cizmek +2
We study the effect of primordial black holes on the classical rate of nucleation of AdS regions within the standard electroweak vacuum at high temperature. We find that the energy…
On the Inflationary Perturbations of Massive Higher-Spin Fields
Alex Kehagias, Antonio Riotto
Cosmological perturbations of massive higher-spin fields are generated during inflation, but they decay on scales larger than the Hubble radius as a consequence of the Higuchi boun…
Inflation and Conformal Invariance: The Perspective from Radial Quantization
Alex Kehagias, Antonio Riotto
According to the dS/CFT correspondence, correlators of fields generated during a primordial de Sitter phase are constrained by three-dimensional conformal invariance. Using the pro…