Ultra High Energy Cosmic Rays, Photons and Neutrinos

TL;DR

This paper reviews how gamma rays and neutrinos produced during ultra high energy cosmic ray propagation help identify their sources and composition, emphasizing the importance of secondary radiation observations.

Contribution

It highlights the significance of secondary gamma ray and neutrino observations in understanding the origins and composition of ultra high energy cosmic rays.

Findings

Secondary gamma rays and neutrinos are crucial for source identification.

Observations of these particles help determine cosmic ray composition.

Secondary radiations provide insights into cosmic ray propagation processes.

Abstract

We briefly review the main channels of gamma ray and neutrino production due to the propagation of ultra high energy cosmic rays. We show how the observations of these secondary radiations are of paramount importance in tagging mass composition and sources of ultra high energy cosmic rays.