Seminar David Nolde

Speaker: 
David Nolde
Affiliation: 
University of Basel
Title: 
What can the CMB tell us about the inflaton potential?
Abstract: 

Cosmological inflation has proven to be a remarkably successful paradigm for understanding the initial conditions of the universe, with generic slow-roll predictions confirmed by experiments to high precision. However, the identity of the inflaton field and many of its properties are still unknown, with many possible inflaton candidates available. In this talk, we discuss how observations constrain the inflaton field range and the inflaton potential, both of which can provide important clues for building explicit particle physics models of inflation. In particular, we derive a general slow-roll bound on the field range and stronger bounds from explicit reconstructions of the inflaton potential, emphasizing the strong impact of a priori assumptions on such observational constraints.

Location: 
5111.0135
Date: 
Tuesday, November 18, 2014 - 12:30