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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Axion Emission Can Explain a New Hard X-Ray Excess from Nearby Isolated Neutron Stars
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Search for Low-Mass Axion Dark Matter with ABRACADABRA-10 cm
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No Evidence for Axions from Chandra Observation of the Magnetic White Dwarf RE J0317-853
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Upper Limit on the QCD Axion Mass from Isolated Neutron Star Cooling
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Axion Wind Detection with the Homogeneous Precession Domain of Superfluid Helium-3
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Sensitivity of Spin-Precession Axion Experiments
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First Constraints on Heavy QCD Axions with a Liquid Argon Time Projection Chamber Using the ArgoNeuT Experiment
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New Opportunities for Detecting Axion-Lepton Interactions
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Search for a Dark-Matter-Induced Cosmic Axion Background with ADMX
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Quantum Science and the Search for Axion Dark Matter
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Exploring Quantized Axion Electrodynamics in Magnetic Topological Insulator Multilayer Heterostructures (Final Technical Report)
The current program is focusing on investigating the properties of the high Chern number quantum anomalous Hall (QAH) effect in magnetic topological insulator (TI) multilayer heterostructures and the exploration of the topological magnetoelectric effect in thick magnetic TI films/heterostructures. Our program includes both experimental and theoretical efforts on this topic.
Displaced searches for Axion-Like Particles and Heavy Neutral Leptons at Mu3e
We present strategies for the Mu3e experiment to search for light, weakly coupled particles produced in rare muon decays, focusing on displaced e+e− decays within the hollow target. In most scenarios the backgrounds can be fully suppressed with a suitable set of cuts. We furthermore quantify the interplay between displaced and prompt searches at Mu3e and existing constraints, showing how Mu3e has a unique opportunity to probe unexplored parameter space.
Analytic bounds on late-time axion-scalar cosmologies
The cosmological dynamics of multiple scalar/pseudoscalar fields are difficult to solve, especially when the field-space metric is curved. This presents a challenge in determining whether a given model can support cosmic acceleration, without solving for the on-shell solution. In this work, we present bounds on late-time FLRW-cosmologies in classes of theories that involve arbitrary numbers of scalar and pseudoscalar fields coupled both kinetically (leading to a curved field space metric) and through scalar potentials. Such bounds are proven analytically, independently of initial conditions, with no approximation in the field equations and without referring to explicit solutions. Besides their broad applications to cosmological model building, our bounds can be applied to studying asymptotic cosmologies of certain classes of string compactifications.
Erratum to: Measurement of light-by-light scattering and search for axion-like particles with 2.2 nb -1 of Pb+Pb data with the ATLAS detector
One correction is noted for the paper, which does not affect the results reported. The right panel of figure 9 is corrected as it contained the “internal” label, giving the misleading impression on the credibility of the figure.