J. Hoffman

Improved Receiver Noise Calibration for ADMX Axion Search: 4.54 to 5.41 $μ$eV

M. Guzzetti, Dan Zhang, Craig A. Goodman, C. Hanretty et autres

Axions are a well-motivated candidate for dark matter. The preeminent method to search for axion dark matter is known as the axion haloscope, which makes use of the conversion of axions to photons in a large magnetic field. Due to the weak …

us, gb, au (code pays fourni par la source)

Search for non-virialized axions with 3.3-4.2 $μ$eV mass at selected resolving powers

A. T. Hipp, A. Quiskamp, T. J. Caligiure, J. R. Gleason et autres

The Axion Dark Matter eXperiment is sensitive to narrow axion flows, given axions compose a fraction of the dark matter with a non-negligible local density. Detecting these low-velocity dispersion flows requires a high spectral resolution and careful attention to the expected signal …

Axion Dark Matter eXperiment around 3.3 μeV with Dine-Fischler-Srednicki-Zhitnitsky Discovery Ability

Craig A. Goodman, M. Guzzetti, C. Hanretty, L. J Rosenberg et autres

We report the results of a QCD axion dark matter search with discovery ability for Dine Fischler Srednicki Zhitnitsky (DFSZ) axions using an axion haloscope. Sub-Kelvin noise temperatures are reached with an ultra low-noise Josephson parametric amplifier cooled by a dilution refrigerator. …

Nonvirialized axion search sensitive to Doppler effects in the Milky Way halo

Chelsea L. Bartram, T. Braine, R. Cervantes, N. Crisosto et autres

The Axion Dark Matter eXperiment (ADMX) has previously excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions between 680--790 MHz under the assumption that the dark matter is described by the isothermal halo model. However, the precise nature of the velocity distribution of dark matter is still …

us, au, gb (code pays fourni par la source)

Low frequency, 100–600 MHz, searches with axion cavity haloscopes

Sankha Subhra Chakrabarty, J. R. Gleason, Y. Han, A. T. Hipp et autres

We investigate reentrant and dielectric loaded cavities for the purpose of extending the range of axion cavity haloscopes to lower masses, below the range where the Axion Dark Matter experiment (ADMX) has already searched. Reentrant and dielectric loaded cavities were simulated numerically …

us, au, gb, jp (code pays fourni par la source)

Axion Dark Matter eXperiment: Run 1A analysis details

C. Boutan, B. H. LaRoque, E. Lentz, N. S. Oblath et autres

The ADMX Collaboration gathered data for its Run 1A axion dark matter search from January 2017 to June 2017, scanning with an axion haloscope over the frequency range 645–680 MHz ( 2.66–2.81 μeV in axion mass) at Dine-Fischler-Srednicki-Zhitnitskii (DFSZ) sensitivity. The resulting …

us, gb (code pays fourni par la source)

Axion Dark Matter eXperiment: Run 1A Analysis Details

C. Boutan, B. H. LaRoque, E. Lentz, N. S. Oblath et autres

The ADMX collaboration gathered data for its Run 1A axion dark matter search from January to June 2017, scanning with an axion haloscope over the frequency range 645-680 MHz (2.66-2.81 ueV in axion mass) at DFSZ sensitivity. The resulting axion search found …

Non-Virialized Axion Search Sensitive to Doppler Effects in the Milky Way Halo

Chelsea L. Bartram, T. Braine, R. Cervantes, N. Crisosto et autres

The Axion Dark Matter eXperiment (ADMX) has previously excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions between 680-790 MHz under the assumption that the dark matter is described by the isothermal halo model. However, the precise nature of the velocity distribution of dark matter is still …

us, au, gb (code pays fourni par la source)

Search for a Dark-Matter-Induced Cosmic Axion Background with ADMX

T. Nitta, T. Braine, N. Du, M. Guzzetti et autres

We report the first result of a direct search for a cosmic axion background ($\mathrm{C}a\mathrm{B}$)---a relativistic background of axions that is not dark matter---performed with the axion haloscope, the Axion Dark Matter eXperiment (ADMX). Conventional haloscope analyses search for a signal with …

us, gb, au, jp, ch (code pays fourni par la source)

Search for "Invisible" Axion Dark Matter in the $3.3\text{-}4.2~{\mu}$eV Mass Range

C. Bartram, T. Braine, Eric Burns, R. Cervantes et autres

We report the results from a haloscope search for axion dark matter in the $3.3\text{-}4.2~{\mu}$eV mass range. This search excludes the axion-photon coupling predicted by one of the benchmark models of invisible axion dark matter, the KSVZ model. This sensitivity is achieved …