Propagation of cosmic rays in the foam-like Universe

TL;DR

This paper explores how a spacetime foam model with wormholes affects cosmic ray propagation, showing damping effects and potential links to dark matter halos, offering a novel way to test the universe's topology.

Contribution

It introduces a classical spacetime foam model with wormholes and analyzes its impact on particle propagation and dark matter formation, providing a new perspective on cosmic topology.

Findings

Single rays experience damping depending on wormhole distribution

Wormholes can form dark matter halos around sources

Correlation between damping and dark matter supports topological universe models

Abstract

The model of a classical spacetime foam is considered, which consists of static wormholes embedded in Minkowski spacetime. We examine the propagation of particles in such a medium and demonstrate that a single thin ray undergoes a specific damping in the density of particles depending on the traversed path and the distribution of wormholes. The missing particles are scattered around the ray. Wormholes was shown to form DM halos around point-like sources. Therefore, the correlation predicted between the damping and the amount of DM can be used to verify the topological nature of Dark Matter.