Direct search for dark matter axions excluding ALP cogenesis in the 63- to 67-μeV range with the ORGAN experiment

Aaron Quiskamp; Ben T McAllister; Paul Altin; Eugene N Ivanov; Maxim Goryachev; Michael E Tobar

doi:10.1126/sciadv.abq3765

Direct search for dark matter axions excluding ALP cogenesis in the 63- to 67-μeV range with the ORGAN experiment

Sci Adv. 2022 Jul 8;8(27):eabq3765. doi: 10.1126/sciadv.abq3765. Epub 2022 Jul 6.

Authors

Aaron Quiskamp¹, Ben T McAllister^{1

2}, Paul Altin³, Eugene N Ivanov¹, Maxim Goryachev¹, Michael E Tobar¹

Affiliations

¹ ARC Centre of Excellence for Engineered Quantum Systems and ARC Centre of Excellence For Dark Matter Particle Physics, Department of Physics, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
² ARC Centre of Excellence for Dark Matter Particle Physics, Swinburne University of Technology, John St., Hawthorn, VIC 3122, Australia.
³ ARC Centre of Excellence for Engineered Quantum Systems, The Australian National University, Canberra, ACT 2600, Australia.

Abstract

The standard model axion seesaw Higgs portal inflation (SMASH) model is a well-motivated, self-contained description of particle physics that predicts axion dark matter particles to exist within the mass range of 50 to 200 micro-electron volts. Scanning these masses requires an axion haloscope to operate under a constant magnetic field between 12 and 48 gigahertz. The ORGAN (Oscillating Resonant Group AxioN) experiment (in Perth, Australia) is a microwave cavity axion haloscope that aims to search the majority of the mass range predicted by the SMASH model. Our initial phase 1a scan sets an upper limit on the coupling of axions to two photons of ∣g_aγγ∣ ≤ 3 × 10^-12 per giga-electron volts over the mass range of 63.2 to 67.1 micro-electron volts with 95% confidence interval. This highly sensitive result is sufficient to exclude the well-motivated axion-like particle cogenesis model for dark matter in the searched region.