Symmetries, Dark Matter and Minicharged Particles
Abstract
This theoretical particle physics thesis is an investigation into old and new symmetries of Nature. Known symmetries and conservation laws serve as a guide for dark and visible sector model building. New symmetries of Nature are proposed, broken and subsequently reinstated at high temperatures in order to discover well-motivated particle physics models for cosmological observations implying the existence of a dark sector. Candidate processes for creation of a non-primordial matter/antimatter asymmetry result from out of equilibrium spontaneous breaking of these symmetries in the early Universe. Using the Standard Model of particle physics as a foundation with minimal new degrees of freedom, minicharged and millicharged particles emerge from a proposed spontaneous breaking of known symmetries. Experimental predictions and constraints for such dark matter candidates are given briefly here and outlined for future work. Constraints on neutrino-like particles found in the debris of broken local (gauge) symmetries are given, a subset of which are sterile and appear to be viable particle dark matter candidates. A failed baryonic dark matter candidate became a candidate to solve an outstanding nuclear structure problem, the EMC effect.
Cite
@article{arxiv.2001.00334,
title = {Symmetries, Dark Matter and Minicharged Particles},
author = {Jennifer Rittenhouse West},
journal= {arXiv preprint arXiv:2001.00334},
year = {2020}
}
Comments
PhD thesis. 88 pages. Chapter 2 entirely based on arXiv:1711.04534, Chapter 3 on arXiv:1703.00199