Evolution of String-Wall Networks and Axionic Domain Wall Problem
Cosmology and Nongalactic Astrophysics
2011-09-06 v3 High Energy Physics - Phenomenology
Abstract
We study the cosmological evolution of domain walls bounded by strings which arise naturally in axion models. If we introduce a bias in the potential, walls become metastable and finally disappear. We perform two dimensional lattice simulations of domain wall networks and estimate the decay rate of domain walls. By using the numerical results, we give a constraint for the bias parameter and the Peccei-Quinn scale. We also discuss the possibility to probe axion models by direct detection of gravitational waves produced by domain walls.
Cite
@article{arxiv.1012.4558,
title = {Evolution of String-Wall Networks and Axionic Domain Wall Problem},
author = {Takashi Hiramatsu and Masahiro Kawasaki and Ken'ichi Saikawa},
journal= {arXiv preprint arXiv:1012.4558},
year = {2011}
}
Comments
19 pages, 7 figures; revised version of the manuscript, accepted for publication in JCAP