Department of Physics Papers

Document Type

Journal Article

Date of this Version

12-14-2009

Comments

Suggested Citation:
Silvestri, A. and M. Trodden. "Non-Gaussian Signatures from the Postinflationary Early Universe." Physical Review Letters 103, 251301.

© 2009 The American Physical Society.
http://dx.doi.org/10.1103/PhysRevLett.103.251301.

Abstract

We consider contributions to non-Gaussianity of the cosmic microwave background (CMB) from remnants of phase transitions in the very early Universe. Such signatures can optimistically be used to discover evidence of new particle physics through cosmological observations. More conservatively they may provide an obstacle to extracting information about the non-Gaussian nature of primordial density fluctuations from any detection in the CMB. We study this explicitly by computing the bispectrum from global textures, which occur in a wide class of particle physics models.

 

Date Posted: 23 November 2010

This document has been peer reviewed.