Light particles - A window to fundamental physics

TL;DR

This paper discusses how light, weakly interacting particles originating from high-energy physics can provide new insights into fundamental physics, highlighting examples like axions and hidden sector photons.

Contribution

It introduces the natural emergence of light particles from high-energy physics and emphasizes their potential to reveal new aspects of fundamental physics.

Findings

Light particles can originate from high-energy physics.

Searching for these particles can reveal new fundamental physics insights.

Examples include axions and hidden sector photons.

Abstract

In these proceedings we illustrate that light, very weakly interacting particles can arise naturally from physics which is fundamentally connected to very high energy scales. Searching for them therefore may give us interesting new insights into the structure of fundamental physics. Prime examples are the axion, and more general axion-like particles, as well as hidden sector photons and matter charged under them.