| Literature DB >> 28234529 |
B M Brubaker1, L Zhong1, Y V Gurevich1, S B Cahn1, S K Lamoreaux1, M Simanovskaia2, J R Root2, S M Lewis2, S Al Kenany2, K M Backes2, I Urdinaran2, N M Rapidis2, T M Shokair2, K A van Bibber2, D A Palken3, M Malnou3, W F Kindel3, M A Anil3, K W Lehnert3, G Carosi4.
Abstract
We report on the first results from a new microwave cavity search for dark matter axions with masses above 20 μeV. We exclude axion models with two-photon coupling g_{aγγ}≳2×10^{-14} GeV^{-1} over the range 23.55<m_{a}<24.0 μeV. These results represent two important achievements. First, we have reached cosmologically relevant sensitivity an order of magnitude higher in mass than any existing limits. Second, by incorporating a dilution refrigerator and Josephson parametric amplifier, we have demonstrated total noise approaching the standard quantum limit for the first time in an axion search.Year: 2017 PMID： 28234529 DOI： 10.1103/PhysRevLett.118.061302
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161