Paper: astro-ph/0603589
Date: Wed, 22 Mar 2006 20:38:09 GMT (9kb)

Title: Limits on SUSY GUTs and Defects Formation in Hybrid Inflationary Models
with Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations

Authors: Aur\'elien A. Fraisse (Princeton University)

Comments: 10 pages, 2 tables
\\
We confront the predicted effects of hybrid inflationary models on the Cosmic
Microwave Background (CMB) with three years of Wilkinson Microwave Anisotropy
Probe (WMAP) observations. Using model selection, we compare the ability of a
simple flat power-law LCDM model to describe the data to hybrid inflationary
models involving global or local cosmic strings, or global textures. We find
that it is statistically impossible to distinguish between these models: they
all give a similar description of the data, the maximum ratio of the various
evidences involved being never higher than e^{0.1 \pm 0.5}. We then derive the
maximum contribution that topological defects can make to the CMB, and place an
upper bound on the possible value of cosmic strings tension of G\mu \leq 2.1
\times 10^{-7} (68% CL). Finally, we give the corresponding constraints on the
strings and D-strings masses, as well as limits on the D- and F-term coupling
constants (\kappa and \lambda) and mass scales (M and \sqrt{\xi}).

\\ ( http://arXiv.org/abs/astro-ph/0603589 , 9kb)