Axion dark matter: How to see it?

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The axion is a highly motivated elementary particle that could address two fundamental questions in physics—the strong charge-parity (CP) problem and the dark matter mystery. Experimental searches for this hypothetical particle started reaching theoretically interesting sensitivity levels, particularly in the micro–electron volt (gigahertz) region. They rely on microwave resonators in strong magnetic fields with signals read out by quantum noise limited amplifiers. Concurrently, there have been intensive experimental efforts to widen the search range by devising various techniques and to enhance sensitivities by implementing advanced technologies. These orthogonal approaches will enable us to explore most of the parameter space for axions and axion-like particles within the next decades, with the 1- to 25-gigahertz frequency range to be conquered well within the first decade. We review the experimental aspects of axion physics and discuss the past, present, and future of the direct search programs.
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Issue Date
2022-02
Language
English
Article Type
Review
Citation

SCIENCE ADVANCES, v.8, no.8

ISSN
2375-2548
DOI
10.1126/sciadv.abm9928
URI
http://hdl.handle.net/10203/294758
Appears in Collection
PH-Journal Papers(저널논문)
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