The fate of small classically stable Q-balls
High Energy Physics - Phenomenology
2018-01-01 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
The smallest classically stable Q-balls are, in fact, generically metastable: in quantum theory they decay into free particles via collective tunneling. We derive general semiclassical method to calculate the rate of this process in the entire kinematical region of Q-ball metastability. Our method uses Euclidean field-theoretical solutions resembling the Coleman's bounce and fluctuations around them. As an application of the method, we numerically compute the decay rate to the leading semiclassical order in a particular one-field model. We shortly discuss cosmological implications of metastable Q-balls.
Keywords
Cite
@article{arxiv.1711.05279,
title = {The fate of small classically stable Q-balls},
author = {Dmitry Levkov and Emin Nugaev and Andrei Popescu},
journal= {arXiv preprint arXiv:1711.05279},
year = {2018}
}
Comments
31 pages, 11 figures; journal version