Imprints of spinning particles on primordial cosmological perturbations

2017/12/31 by Gabriele Franciolini, Alex Kehagias, Antonio Riotto · 1 citation
Economics, Econometrics and Finance · Physics and Astronomy · #Anisotropy #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmological perturbation theory #Cosmology #Cosmology and Gravitation Theories #Dark energy #Gravitation #Graviton #Hubble's law #Inflation (cosmology) #Massless particle #Mathematical physics #Operator (biology) #Physics #Planck #Quantum mechanics #Scalar (mathematics) #Spinning #Stochastic processes and financial applications #Theoretical physics #astro-ph.CO #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1088/1475-7516/2018/02/023

published as JCAP02(2018)023 · 21 pages, 2 figures, v2: matching published version

openalex publication_date 2018/02/13 · arxiv created 2018/02/14 · arxiv updated 2018/02/15 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/06

Abstract

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 involving scalar and graviton fluctuations. We characterise such signatures using the dS/CFT 3 correspondence and the operator product expansion techniques. In particular, we obtain generic results for the case of partially massless higher-spin states.

Citations

• Generating the curvature perturbation without an inflaton
• Large non-Gaussianities with intermediate shapes from quasi-single-field inflation
• The generalized curvature and Christoffel symbols for a higher spin potential in AdSd+1 space
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Particle Physics Models of Inflation and the Cosmological Density Perturbation
• The dS/CFT correspondence
• Higher spin realization of the DS/CFT correspondence

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