I-ball formation with logarithmic potential
Cosmology and Nongalactic Astrophysics
2015-05-28 v2 High Energy Physics - Phenomenology
Abstract
A coherently oscillating real scalar field with potential shallower than quadratic one fragments into spherical objects called I-balls. We study the I-ball formation for logarithmic potential which appears in many cosmological models. We perform lattice simulations and find that the I-balls are formed when the potential becomes dominated by the quadratic term. Furthermore, we estimate the I-ball profile assuming that the adiabatic invariant is conserved during formation and obtain the result that agrees to the numerical simulations.
Keywords
Cite
@article{arxiv.1310.4615,
title = {I-ball formation with logarithmic potential},
author = {Masahiro Kawasaki and Naoyuki Takeda},
journal= {arXiv preprint arXiv:1310.4615},
year = {2015}
}
Comments
16 pages, 6 figures