IAXO, next-generation of helioscopes

TL;DR

IAXO is a next-generation axion helioscope aiming to detect solar axions and ALPs with unprecedented sensitivity, potentially exploring key regions relevant to astrophysical anomalies and stellar cooling.

Contribution

This paper reviews the status and potential of IAXO to probe the axion/ALPs parameter space beyond current bounds.

Findings

IAXO can detect axions with photon coupling down to 10^{-12} GeV^{-1}.

IAXO surpasses current experimental and astrophysical bounds.

Potential to investigate anomalies in light propagation and stellar cooling.

Abstract

The International Axion Observatory (IAXO) is a forth generation axion helioscope designed to detect solar axions and axion-like particles (ALPs) with a coupling to the photon $g_{a\gamma}$ down to a few $10^{-12}$ GeV$^{-1}$, 1.5 orders of magnitude beyond the current best astrophysical and experimental upper bounds. This range includes parameter values invoked in the context of the observed anomalies in light propagation over astronomical distances and to explain the excessive cooling observed in a number of stellar objects. Here we review the status of the IAXO project and of its potential to probe the most physically motivated regions of the axion/ALPs parameter space.