Department of Physics Papers
Document Type
Journal Article
Date of this Version
12-14-2009
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.
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.