Positronium Decays with Dark $Z$ and Fermionic Dark Matter
High Energy Physics - Phenomenology
2022-06-01 v2
Abstract
We investigate the invisible decay of positronium to probe the fermionic light dark matter mediated by the dark boson. Too tiny is the invisible decay rate of positronium through weak interaction in the standard model to be detected in the experiment. We show that it can be enhanced to be observed in the future if the dark matter is lighter than the electron in the dark model. We also compute the relic abundance of such light dark matter and discuss the Big Bang Nucleosynthesis constraint with an alternative thermal history scenario.
Cite
@article{arxiv.2111.10949,
title = {Positronium Decays with Dark $Z$ and Fermionic Dark Matter},
author = {Dong-Won Jung and Chaehyun Yu and Kang Young Lee},
journal= {arXiv preprint arXiv:2111.10949},
year = {2022}
}
Comments
8 pages, 4 figures