First Results from ABRACADABRA-10 cm: A Search for Sub-
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 Axion Dark Matter

Ouellet, J. L.; Salemi, C.; Foster, Joshua W.; Henning, R.; Bogorad, Zachary; Conrad, J. M.; Formaggio, J. A.; Kahn, Yonatan; Minervini, J.V.; Radovinsky, A.; Rodd, Nicholas L.; Safdi, Benjamin R.; Thaler, Jesse; Winklehner, Daniel; Winslow, L. A.

doi:10.1103/physrevlett.122.121802

Cited by 263 publications

(154 citation statements)

References 58 publications

(79 reference statements)

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“…The central problem in detecting the axion however is that we do not know the frequency, ω m a (1 + v 2 /2) at which the electromagnetic response to the axion field should be monitored. To search for this frequency, haloscopes either enforce a resonance or constructive interference condition for a signal oscillating at ∼ m a (as in e.g., ADMX [116,117], MADMAX [118,119], HAYSTAC [120][121][122][123], CULTASK [124][125][126], OR-GAN [127,128], KLASH [129] and RADES [130]), or are sensitive to a wide bandwidth of frequencies simultaneously (e.g., ABRACADABRA [131][132][133], BEAST [134] and DM-Radio [135]). See Ref.…”

Section: Axion Searchesmentioning

confidence: 99%

Velocity substructure from Gaia and direct searches for dark matter

et al. 2020

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Data from the Gaia satellite show that the solar neighbourhood of the Milky Way's stellar halo is imprinted with substructure from several accretion events. Evidence of these events is found in "the Shards", stars clustering with high significance in both action space and metallicity. Stars in the Shards share a common origin, likely as ancient satellite galaxies of the Milky Way, so will be embedded in dark matter (DM) counterparts. These "Dark Shards" contain two substantial streams (S1 and S2), as well as several retrograde, prograde and lower energy objects. The retrograde stream S1 has a very high Earth-frame speed of ∼ 550 km s −1 while S2 moves on a prograde, but highly polar orbit and enhances peak of the speed distribution at around 300 km s −1 . The presence of the Dark Shards locally leads to modifications of many to the fundamental properties of experimental DM signals. The S2 stream in particular gives rise to an array of effects in searches for axions and in the time dependence of nuclear recoils: shifting the peak day, inducing non-sinusoidal distortions, and increasing the importance of the gravitational focusing of DM by the Sun. Dark Shards additionally bring new features for directional signals, while also enhancing the DM flux towards Cygnus.

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Section: Axion Searchesmentioning

confidence: 99%

Velocity substructure from Gaia and direct searches for dark matter

et al. 2020

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“…Such a technique has been fruitfully translated into a vigorous laboratory detection program by some collaborations like ADMX [122][123][124][125][126], YLW [127] and KLASH [128]. A different technique that implements a dielectric haloscope has been implemented by the MADMAX collaboration [129,130], while the ABRACADABRA experiment exploits the coupling of the dark matter axion to a static magnetic field by probing the oscillating magnetic field induced by the particle [131,132]. For thorough reviews on the topic of the QCD axion, we refer the reader to Refs.…”

Section: Axion Physicsmentioning

confidence: 99%

Probing the early Universe with axion physics and gravitational waves

Ramberg

Visinelli

2019

Phys. Rev. D

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We show results for the expected reach of the network of experiments that is being set up globally with the aim of detecting the "invisible" axion, in light of a non-standard thermal history of the universe. Assuming that the axion is the dark matter, we discuss the reach of a successful detection by a given experimental setup in a particular axion mass window for different modifications of the cosmological background before primordial nucleosynthesis occurred. Results are presented both in the case where the present energy budget in cold axions is produced through the vacuum realignment mechanism alone, or in the case in which axionic strings also provide with additional contributions to the axion energy density. We also show that in some cosmological models, the spectrum of gravitational waves from the axionic string network would be within reach of the future network of detectors like LISA and DECIGO-BBO. We conclude that some scenarios describing the early universe can be probed jointly by the experimental efforts on axion detection and by gravity wave multi-messenger astronomy.

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“…The basic approach of Refs. [5][6][7][8][9][10][11][12][13] and similar proposals is to search for those tiny induced electric or magnetic fields, either by using broadband or resonant detection methods. Note that "tiny" means that, for a DM axion with m a ∼ 10 −5 eV and a coupling g aγ ∼ 10 −15 GeV −1 , a 7 T magnetic field induces an E field with a magnitude of the order 10 −13 V/m.…”

Section: Introductionmentioning

confidence: 99%

Axion-electrodynamics: a quantum field calculation

Beutter

Pargner

Schwetz

et al. 2019

J. Cosmol. Astropart. Phys.

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An axion background field induces tiny oscillating electric and magnetic fields in an external static magnetic field. This signature is used to search for axion dark matter. We use standard quantum field theory techniques to obtain an expression for a transition amplitude, from which we identify the classical electromagnetic fields induced by the background axion field. We confirm previous results, that if the spatial size R of the applied static magnetic field is small compared to the axion Compton wavelength λ, the induced electric and magnetic fields are parametrically suppressed by the small numbers (R/λ) 2 and R/λ, respectively, relative to the case when R is larger than λ. Our approach allows an intuitive interpretation in terms of 4-momentum conservation and momentum exchange via the photon propagator.

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First Results from ABRACADABRA-10 cm: A Search for Sub- μeV Axion Dark Matter

Cited by 263 publications

References 58 publications

Velocity substructure from Gaia and direct searches for dark matter

Velocity substructure from Gaia and direct searches for dark matter

Probing the early Universe with axion physics and gravitational waves

Axion-electrodynamics: a quantum field calculation

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