Q-ball Instability due to U(1) Breaking
High Energy Physics - Phenomenology
2010-11-05 v2 Astrophysics
Abstract
Q-ball is a non-topological soliton whose stability is ensured by global U(1) symmetry. We study a Q-ball which arises in the Affleck-Dine mechanism for baryogenesis and consider its possible instability due to U(1) breaking term (-term) indispensable for successful baryogenesis. It is found that the instability destroys the Q-ball if its growth rate exceeds inverse of the typical relaxation time scale of the Q-ball. However, the instability is not so strong as it obstructs the cosmological formation of the Q-balls.
Keywords
Cite
@article{arxiv.hep-ph/0504105,
title = {Q-ball Instability due to U(1) Breaking},
author = {Masahiro Kawasaki and Kenichiro Konya and Fuminobu Takahashi},
journal= {arXiv preprint arXiv:hep-ph/0504105},
year = {2010}
}
Comments
6 pages, 8 figures, reference and a few explanatory comments were added