Unified origin for visible and dark matter in a baryon-symmetric universe from a first-order phase transition

TL;DR

This paper discusses a model where a first-order phase transition during bubble nucleation creates a baryon-symmetric universe, linking visible and dark matter densities through a process similar to electroweak baryogenesis.

Contribution

It introduces a novel mechanism for generating a baryon-symmetric universe via bubble nucleation during a first-order phase transition, connecting visible and dark matter origins.

Findings

Proposes a first-order phase transition as the origin of baryon symmetry.

Demonstrates a process analogous to electroweak baryogenesis.

Provides a framework linking visible and dark matter densities.

Abstract

In a baryon-symmetric universe, the baryon asymmetry observed for visible matter is matched by an equal and opposite asymmetry for dark matter, thereby closely connecting the number densities of both types of matter. This is a necessary step towards the goal of explaining the mystery of why the visible and dark matter densities are observed to be similar. In this talk, a way of producing such a universe from bubble nucleation during a first-order phase transition is reviewed. The process is an analog of electroweak baryogenesis.