The RadioAxion experiment at Gran Sasso found no evidence for axion dark matter induced periodic modulations in 241Am decays and derived constraints on the axion decay constant for masses from 10^{-21} to 10^{-9} eV.
New Observables for Direct Detection of Axion Dark Matter
8 Pith papers cite this work. Polarity classification is still indexing.
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abstract
We propose new signals for the direct detection of ultralight dark matter such as the axion. Axion or axion like particle (ALP) dark matter may be thought of as a background, classical field. We consider couplings for this field which give rise to observable effects including a nuclear electric dipole moment, and axial nucleon and electron moments. These moments oscillate rapidly with frequencies accessible in the laboratory, ~ kHz to GHz, given by the dark matter mass. Thus, in contrast to WIMP detection, instead of searching for the hard scattering of a single dark matter particle, we are searching for the coherent effects of the entire classical dark matter field. We calculate current bounds on such time varying moments and consider a technique utilizing NMR methods to search for the induced spin precession. The parameter space probed by these techniques is well beyond current astrophysical limits and significantly extends laboratory probes. Spin precession is one way to search for these ultralight particles, but there may well be many new types of experiments that can search for dark matter using such time-varying moments.
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Collective nucleon scattering in neutron-star matter suppresses the effective absorption of ultralight bosons at the long wavelengths relevant for superradiance, weakening the link between stellar cooling bounds and superradiant instability rates.
A framework is developed to predict axion-induced time modulations in weak nuclear decays, used to derive constraints on the axion decay constant from reanalyzed Gran Sasso data on 40K and 137Cs and to propose future sensitivity to higher masses.
Piezoelectric materials combined with nuclear spin alignment can source virtual QCD axions with up to 7 orders of magnitude enhanced scalar coupling, allowing resonant detection of the axion via spin precession in the 10^{-5} to 10^{-2} eV range.
Proposes resonant detection of QCD axions (0.1-2.3 meV) and dark photons (down to epsilon ~2e-16) via highly excited electron cyclotron states in an open-endcap Penning trap compatible with large cavities.
Laser-induced paramagnetic centers reduce the 207Pb nuclear T1 by a factor of approximately two in PT and PMN-PT crystals, from 17 s to 7 s at 4.6 MHz.
Incorporating timing information from time-dependent new physics signals can improve LHC search sensitivity by up to a factor of two compared to standard time-invariant analyses.
A protocol using squeezed states in 2D ion crystals in a Penning trap achieves super-Heisenberg sensitivity for axion-like particles, dark photons, and high-frequency gravitational waves while accounting for decoherence.
citing papers explorer
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Stellar Superradiance and Low-Energy Absorption in Dense Nuclear Media
Collective nucleon scattering in neutron-star matter suppresses the effective absorption of ultralight bosons at the long wavelengths relevant for superradiance, weakening the link between stellar cooling bounds and superradiant instability rates.
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Highly Excited Electron Cyclotron for QCD Axion and Dark-Photon Detection
Proposes resonant detection of QCD axions (0.1-2.3 meV) and dark photons (down to epsilon ~2e-16) via highly excited electron cyclotron states in an open-endcap Penning trap compatible with large cavities.
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Time-dependent signals of new physics at the LHC
Incorporating timing information from time-dependent new physics signals can improve LHC search sensitivity by up to a factor of two compared to standard time-invariant analyses.
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Super-Heisenberg protocol for dark matter and high-frequency gravitational wave search
A protocol using squeezed states in 2D ion crystals in a Penning trap achieves super-Heisenberg sensitivity for axion-like particles, dark photons, and high-frequency gravitational waves while accounting for decoherence.