## Upcoming Events

## Testing Inflation with Large-scale Structure

January 29, 2013 12:00PM to 1:00PM

Presenter

Marilena Loverde, University of Chicago

Location

Building 362, Room F108

Type

Seminar

Series

HEP Lunch Seminar

Abstract:

Cosmic inflation provides a mechanism for generating the early density perturbations that seeded the large-scale structures we see today. Primordial non-Gaussianity is among the most promising of few observational tests of physics at this epoch. At present non-Gaussianity is best constrained by the cosmic microwave background, but in the near term large-scale structure data may be competitive so long as the effects of primordial non-Gaussianity can be modeled through the non-linear process of structure formation. I will discuss recent work modeling effects of a few types of primordial non-Gaussianity on the large-scale halo clustering and the halo mass function.

Cosmic inflation provides a mechanism for generating the early density perturbations that seeded the large-scale structures we see today. Primordial non-Gaussianity is among the most promising of few observational tests of physics at this epoch. At present non-Gaussianity is best constrained by the cosmic microwave background, but in the near term large-scale structure data may be competitive so long as the effects of primordial non-Gaussianity can be modeled through the non-linear process of structure formation. I will discuss recent work modeling effects of a few types of primordial non-Gaussianity on the large-scale halo clustering and the halo mass function.

More specifically, I will compare analytic and N-body results for two variants of the curvaton model of inflation:

- (i) a tau NL scenario in which the curvaton and inflaton contribute equally to the primordial curvature perturbation and
- (ii) a gNL model where cancellations vanish the usual quadratic fNL term in the potential, but give rise to a large cubic term.