Limits on Dark Photons, Scalars, and Axion-Electromagnetodynamics with the ORGAN Experiment

Ben T. McAllister, Aaron Quiskamp, Ciaran A. J. O'Hare, Paul Altin, Eugene N. Ivanov, Maxim Goryachev, Michael E. Tobar

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Axions are a well-motivated dark matter candidate, with a host of experiments around the world searching for direct evidence of their existence. The ORGAN Experiment is a type of axion detector known as an axion haloscope, which takes the form of a cryogenic resonant cavity embedded in a strong magnetic field. ORGAN recently completed Phase 1a, a scan for axions approximate to 65 mu eV, and placed the most stringent limits to date on the dark matter axion-photon coupling in this region, |ga gamma gamma|<= 3x10-12. It has been shown that axion haloscopes such as ORGAN are automatically sensitive to other kinds of dark matter candidates, such as dark photons, scalar field/dilaton dark matter, and exotic axion-electromagnetic couplings motivated by quantum electromagnetodynamics. The exclusion limits placed on these various dark matter candidates are computed by ORGAN 1a, and sensitivity for some future ORGAN phases are projected. In particular, the dark photon limits are the most sensitive to date in some regions of the parameter space.
Original languageEnglish
Article number2200622
Number of pages8
JournalAnnalen der Physik
Issue number1
Early online date6 Jun 2023
Publication statusPublished - Jan 2024


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