Large non-Gaussianity from slow-roll inflation

Add to your list(s) Download to your calendar using vCal

• Christian Byrnes (Heidelberg)
• Friday 06 March 2009, 13:00-14:00
• Pavilion B Potter Room (B1.19).

If you have a question about this talk, please contact Dr H K Kunduri.

Non-Gaussianity of the primordial curvature perturbation is a powerful and topical way of distinguishing between the many possible models of inflation. While the simplest models of inflation predict a tiny level of non-Gaussianity, there are many models which predict an observable level of non-Gaussianity such as the curvaton scenario, modulated reheating etc. In this talk I show that it is possible to generate a large level of non-Gaussianity (f_NL~100) during multiple-field inflation, without breaking the slow-roll conditions. The non-Gaussianity is generated on super-Hubble scales and is of the local form. I present the general conditions required to generate a large non-Gausssianity and quantify the fine tuning of the initial conditions required to achieve this. Finally I apply these conditions to the specific model of hybrid inflation.

This talk is part of the DAMTP Friday GR Seminar series.

This talk is included in these lists:

• All CMS events
• All Talks (aka the CURE list)
• CMS Events
• Cambridge Astronomy Talks
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• DAMTP Friday GR Seminar
• DAMTP info aggregator
• Interested Talks
• Kavli Institute for Cosmology Talk Lists
• Pavilion B Potter Room (B1.19)
• Priscilla
• School of Physical Sciences
• bld31

Note that ex-directory lists are not shown.