# Multiphoton annihilation of monopolium

## TL;DR

This paper discusses the significant multi-photon annihilation processes of monopole-antimonopole pairs and monopolium due to strong monopole-photon coupling, emphasizing their experimental detectability.

## Contribution

It highlights the importance of multi-photon final states in monopole annihilation, providing new insights into their experimental signatures.

## Key findings

- Multi-photon events dominate monopole-antimonopole annihilation.
- Four and six photon events are sizable for strongly bound monopolium.
- Multi-photon processes are crucial for experimental detection.

## Abstract

We show that due to the large coupling constant of the monopole-photon interaction the annihilation of monopole-antimonopole and monopolium into many photons must be considered experimentally. For monopole-antimonopole annihilation and lightly bound monopolium, even in the less favorable scenario, multi-photon events (four and more photons in the final state) are dominant, while for strongly bound monopolium, although two photon events are important, four and six photon events are also sizable.