# Round Table on Axions and Axion-like Particles

## TL;DR

This paper reviews the properties and significance of QCD axions and axion-like particles in astrophysics and cosmology, and discusses experimental approaches to detect them, based on a conference round table discussion.

## Contribution

It provides a comprehensive overview of axion properties, their roles in astrophysics and cosmology, and summarizes experimental search strategies, offering a current state-of-the-art review.

## Key findings

- Summarizes key properties of QCD axions and ALPs.
- Highlights their relevance in astrophysics and cosmology.
- Describes experimental detection concepts.

## Abstract

In this contribution, based on the discussion at a round table of the XIII Quark Confinement and the Hadron Spectrum - Confinement conference, we review the main properties of the QCD axion and, more generally, of axion-like particles and their relevance in astrophysics and cosmology. In the last section we describe the experimental concepts to search for the QCD axion and axion-like particles (ALPs).