Limits on axion–photon coupling or on local axion density: Dependence on models of the Milky Way’s dark halo
Journal Article
·
· Physics of the Dark Universe
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- Univ. of Washington, Seattle, WA (United States)
- National Radio Astronomy Observatory, Charlottesville, VA (United States)
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of California, Berkeley, CA (United States)
- Univ. of Florida, Gainesville, FL (United States)
- Univ. of Sheffield (United Kingdom)
- Univ. of Washington, Seattle, WA (United States); Raytheon BBN Technologies, Cambridge, MA (United States)
The μV-scale axion is a compelling cold dark matter candidate. The Axion Dark Matter eXperiment (ADMX) searches for axions by stimulating the decay of galactic dark matter halo axions into detectable microwave photons by their conversion in a resonant cavity permeated by a strong, static magnetic field. The signal depends on properties of the Milky Way’s dark matter halo; the choice of halo model has significant implications for the sensitivity of direct detection searches, e.g., ADMX. This work explores the sensitivity of the data taken by ADMX from 2008 to 2010 to various dark matter halo models. New models for the phase-space distribution of local axions are considered; the analysis demonstrates that certain assumptions about the dark matter halo improve limits on axion–photon coupling. In addition, new ADMX data covering 860–892 MHz are included in the analysis.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- Heising-Simons Foundation; USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program. Lawrence Livermore National Laboratory (LLNL); USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC02-05CH11231; AC03-76SF00098; AC52-07NA27344; SC0011665
- OSTI ID:
- 1870065
- Alternate ID(s):
- OSTI ID: 22917625
OSTI ID: 1397384
- Report Number(s):
- LLNL-JRNL-835233; 1054040
- Journal Information:
- Physics of the Dark Universe, Journal Name: Physics of the Dark Universe Vol. 14; ISSN 2212-6864
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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