CPT Violation, Mirror World and Implications for Baryon Asymmetry

TL;DR

The paper introduces a CPT-symmetric universe model with a mirror universe, where local CPT violations lead to matter-antimatter asymmetry, offering a geometric interpretation of time reversal.

Contribution

It presents a novel CPT-symmetric universe framework with a mirror universe, explaining matter-antimatter asymmetry through local CPT violations and geometric time reversal.

Findings

Mirror universe with opposite chiralities and reversed time coordinates.

Local CPT violation induces mass differences between inflaton and anti-inflaton.

Asymmetry modifies reheating temperatures, explaining matter-antimatter imbalance.

Abstract

We propose a novel model in which the Universe is created as a pair of coordinate-reversed counterparts, forming a globally CPT-symmetric system that permits local CPT violations within each sector. This framework naturally introduces a mirror universe with opposite chiralities and reversed microscopic time coordinates, providing a geometric interpretation of time reversal without relying on initial-final state interchange. We investigate the consequences of local CPT violation in each universe, which induces a mass difference between the real inflaton and anti-inflaton fields. Such an asymmetry can modify reheating temperatures and naturally generate the observed matter-antimatter asymmetry in both universes.