Integrating out Heavy Fields in Inflation (Submitted on 17 Mar 2012).
Model-Independent Signatures of New Physics in non-Gaussianity (Submitted on 3 Feb 2012).
Model-Independent Signatures of New Physics in Slow-Roll Inflation (Submitted on 5 Apr 2011).
Model Independent Signatures of New Physics in the Inflationary Power Spectrum
(Submitted on 1 Jul 2010 (v1), last revised 12 Dec 2011 (this version, v2)).
Recent popular-audience articles:
Physicists search for new physics in primordial quantum fluctuations.