Lepton Asymmetric Universe
High Energy Physics - Phenomenology
2022-11-03 v2 Cosmology and Nongalactic Astrophysics
Abstract
The recent observation of He implies that our universe has a large lepton asymmetry. We consider the Affleck-Dine (AD) mechanism for lepton number generation. In the AD mechanism, non-topological solitons called L-balls are produced, and the generated lepton number is confined in them. The L-balls protect the generated lepton number from being converted to baryon number through the sphaleron processes. We study the formation and evolution of the L-balls and find that the universe with large lepton asymmetry suggested by the recent He measurement can be realized.
Cite
@article{arxiv.2203.09713,
title = {Lepton Asymmetric Universe},
author = {Masahiro Kawasaki and Kai Murai},
journal= {arXiv preprint arXiv:2203.09713},
year = {2022}
}
Comments
12 pages, 1 figure