Generating Luminous and Dark Matter During Inflation

TL;DR

This paper introduces a novel inflation-era mechanism generating both luminous and dark matter through anomaly-induced processes linked to an anomalous $U(1)_X$ group, connecting matter genesis with early universe physics.

Contribution

It develops a new framework for matter generation during inflation involving anomaly-driven charge violation, applied to extensions of the Standard Model with dark matter candidates.

Findings

Mechanism successfully produces baryon and dark matter densities.

Framework applicable to models with anomalous $B$ and $B-L$ gauge groups.

Provides a unified inflationary origin for visible and dark matter.

Abstract

We propose a new mechanism for generating both luminous and dark matter during cosmic inflation. According to this mechanism, ordinary and dark matter carry common charge which is associated with an anomalous $ U(1)_{X} $ group. Anomaly terms source $ \mathcal{CP} $ and $ U(1)_{X} $ charge violating processes during inflation, producing corresponding non-zero Chern-Simons numbers which are subsequently reprocessed into baryon and dark matter densities. The general framework developed is then applied to two possible extensions of the Standard Model with anomalous gauged $B$ and $B-L$, each with an additional dark matter candidate.