A
Antonio Riotto
Researcher at University of Geneva
Publications - 532
Citations - 38796
Antonio Riotto is an academic researcher from University of Geneva. The author has contributed to research in topics: Inflation (cosmology) & Dark matter. The author has an hindex of 94, co-authored 505 publications receiving 34128 citations. Previous affiliations of Antonio Riotto include University of Chicago & Spanish National Research Council.
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arXiv : Imprints of Spinning Particles on Primordial Cosmological Perturbations
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Detecting higher spin fields through statistical anisotropy in the CMB and galaxy power spectra
Nicola Bartolo,Nicola Bartolo,Alex Kehagias,Michele Liguori,Michele Liguori,Antonio Riotto,Maresuke Shiraishi,Vittorio Tansella +7 more
TL;DR: In this article, the impact of the comoving curvature perturbation in the specific model where massive higher spin fields are rendered effectively massless during a de Sitter epoch through suitable couplings to the inflaton field was studied.
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On the Inflationary Perturbations of Massive Higher-Spin Fields
TL;DR: In this paper, it was shown that one can obtain statistical correlators of massive higher-spin fields which remain constant or decay very slowly outside the Hubble radius, which opens up the possibility of new observational signatures from inflation.
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The four-point correlator in multifield inflation, the operator product expansion and the symmetries of de Sitter
A. Kehagias,Antonio Riotto +1 more
TL;DR: In this article, the authors exploit the operator product expansion and partly the symmetries present during the de Sitter epoch to characterize the non-Gaussian four-point correlator in the squeezed limit and point out that the contribution to it from the intrinsic nonGaussianity of the light fields at horizon crossing can be larger than the usually studied contribution arising on superhorizon scales.
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Gauge-Independent Scales Related to the Standard Model Vacuum Instability
TL;DR: In this article, the authors provide several gauge-invariant scales related with the Higgs potential instability, which is not gauge invariant and suffers from a gauge-fixing uncertainty of up to 2 orders of magnitude.