University of Minnesota
School of Physics & Astronomy

Fine Theoretical Physics Institute Seminar

Friday, April 10th 2009
Speaker: Ido Ben-Dayan, Ben-Gurion University
Subject: Surprises in small field models of inflation

The common wisdom suggests that simple small field models of inflation share similar properties such as red spectral index, undetectable gravitational waves (GW), undetectable running of the spectral index and undetectable non-gaussianity. In this talk I will explain the reasons for these properties and show that all of them are due to oversimplification of the models. I will demonstrate how one can design small single field models which cover all the parameter space allowed by WMAP5, for example, a small field model with detectable GW of r=0.2. Moreover, these models exhibit detectable non-gaussianity of f_{NL}>5 without exiting the slow-roll regime, making them easy targets for detection.

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