Quantum Loops in de Sitter space and Scale Dependent Galaxy Bias at Small WaveVectors Speaker(s): Mark Wise
Abstract:
The power spectrum for fluctuations in the number density of galaxies can be very different in shape from the power spectrum for fluctuations in the mass density at very small wave vectors (i.e., large length scales) if the primordial density fluctuations are nonGaussian. I review this phenomena. (It is fairly well known in the more astrophysical part of the cosmology community but less so in the particle physics part of the field.) Then I show that primordial nonGaussianities that arise from quantum loop diagrams in deSitter space can give rise to this phenomena. I also discuss if it is observable given constraints on primordial nonGaussianity that arise from the Cosmic Microwave Background Date: 07/06/2018  1:00 pm
Series: Particle Physics
