TL;DR
This paper reviews the ongoing efforts and recent developments in experimental searches for axions and axion-like particles, which are promising dark matter candidates and solutions to astrophysical puzzles.
Contribution
It provides a comprehensive overview of new small-scale experiments worldwide that are actively hunting for axions, complementing traditional accelerator searches.
Findings
Emerging experiments are increasingly sensitive to axion parameter space.
Axion searches could potentially identify dark matter particles.
Recent results constrain axion properties in certain mass ranges.
Abstract
Many theoretically well-motivated extensions of the Standard Model of particle physics predict the existence of the axion and further ultralight axion-like particles. They may constitute the mysterious dark matter in the universe and solve some puzzles in stellar and high-energy astrophysics. There are new, relatively small experiments around the globe, which started to hunt for these elusive particles and complement the accelerator based search for physics beyond the Standard Model.
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