Search for Invisible Axion Dark Matter in the 3.3-4.2  μeV Mass Range.

  title={Search for Invisible Axion Dark Matter in the 3.3-4.2  $\mu$eV Mass Range.},
  author={C. Bartram and Thomas Braine and Ethan Burns and Raphael Cervantes and N. Crisosto and N. Du and H. B. Korandla and G. Leum and P. Mohapatra and Tatsumi Nitta and Leslie J. Rosenberg and Gray Rybka and J. Yang and Jackson D. Clarke and I. W. Siddiqi and Ankur Agrawal and Akash V. Dixit and Mohamed H. Awida and Aaron S. Chou and Matthew I. Hollister and Stefan Knirck and A. H. Sonnenschein and W. C. Iii Wester and Joseph Gleason and Ann Hipp and S Jois and P. Sikivie and Neil S. Sullivan and Dylan Tanner and Erik W Lentz and R Khatiwada and G. Carosi and Nicholas A Robertson and N Woollett and Linda D. Duffy and Christian Boutan and M. Jones and B. H. LaRoque and N. S. Oblath and Matthew S. Taubman and E J Daw and Michael Perry and James H. Buckley and Chandrahas Gaikwad and J. Hoffman and Kater W. Murch and Maxim Goryachev and Ben T. Mcallister and Aaron P. Quiskamp and Catriona A. Thomson and Michael E. Tobar},
  journal={Physical review letters},
  volume={127 26},
We report the results from a haloscope search for axion dark matter in the 3.3-4.2  μeV mass range. This search excludes the axion-photon coupling predicted by one of the benchmark models of "invisible" axion dark matter, the Kim-Shifman-Vainshtein-Zakharov model. This sensitivity is achieved using a large-volume cavity, a superconducting magnet, an ultra low noise Josephson parametric amplifier, and sub-Kelvin temperatures. The validity of our detection procedure is ensured by injecting and… 

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