Extracting the Primordial Signal from Large-Scale Structure Power Spectra

Benjamin Wallisch  - Stockholm University
Extracting the Primordial Signal from Large-Scale Structure Power Spectra

The primordial universe may provide a window to the highest energy densities accessible in nature. The observational detection of primordial non-Gaussianity and/or primordial features would therefore shed unique light on the laws of physics at scales far beyond those of any terrestrial experiment. In this talk, I will show how current and future large-scale structure surveys can place interesting constraints on the degrees of freedom and dynamics of cosmic inflation (and its alternatives). I will focus on inflationary imprints on galaxy power spectra, in particular the scale-dependent bias induced by any primordial non-Gaussian signal in biased tracers beyond the standard shapes, including those motivated by the cosmological collider. I will also explain where the constraining power comes from, and present BOSS DR12 and forecasted constraints on these general signals.

You can also attend online on Zoom.

Meeting ID: 835 5697 2608
Passcode: 073113