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Title: Modulation sensitive search for nonvirialized dark-matter axions

Journal Article · · Physical Review D
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  1. Univ. of Florida, Gainesville, FL (United States)
  2. Univ. of Washington, Seattle, WA (United States)
  3. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  5. National Radio Astronomy Observatory, Charlottesville, VA (United States)
  6. Univ. of California, Berkeley, CA (United States)
  7. Univ. of Sheffield (United Kingdom)

Nonvirialized dark-matter axions may be present in the Milky Way halo in the form of low-velocity-dispersion flows. In this paper, the Axion Dark-Matter eXperiment performed a search for the conversion of these axions into microwave photons using a resonant cavity immersed in a strong, static magnetic field. The spread of photon energy in these measurements was measured at spectral resolutions of the order of 1 Hz and below. If the energy variation were this small, the frequency modulation of any real axion signal due to the orbital and rotational motion of Earth would become non-negligible. Conservative estimates of the expected signal modulation were made and used as a guide for the search procedure. The photon frequencies covered by this search are 812–852 and 858–892 MHz, which correspond to an axion mass of 3.36–3.52 and 3.55 3.69 μ eV . Finally, no axion signal was found, and limits were placed on the maximum local density of nonvirialized axions of these masses.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Univ. of Florida, Gainesville, FL (United States); Univ. of Washington, Seattle, WA (United States); Univ. of California, Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); LLNL Laboratory Directed Research and Development (LDRD) Program; Heising-Simons Foundation (United States)
Grant/Contract Number:
AC52-07NA27344; AC03-76SF00098; SC0010280; FG02-97ER41029; FG02-96ER40956
OSTI ID:
1458689
Alternate ID(s):
OSTI ID: 1328594
Report Number(s):
LLNL-JRNL-737372; 890319; TRN: US1901508
Journal Information:
Physical Review D, Vol. 94, Issue 8; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (2)

Piezoelectrically Tuned Multimode Cavity Search for Axion Dark Matter journal December 2018
Inferred Evidence for Dark Matter Kinematic Substructure with SDSS– Gaia journal March 2019

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