W. A. Terrano
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View article: Microscale torsion resonators for short-range gravity experiments
Microscale torsion resonators for short-range gravity experiments Open
Measuring gravitational interactions on sub-100-$μ$m length scales offers a window into physics beyond the Standard Model. However, short-range gravity experiments are limited by the ability to position sufficiently massive objects to with…
Laboratory Constraints on the Neutron-Spin Coupling of feV-Scale Axions Open
Ultralight axion-like particles can contribute to the dark matter near the Sun, leading to a distinct, stochastic signature in terrestrial experiments. We search for such particles through their neutron-spin coupling by re-analyzing approx…
Laboratory Constraints on the Neutron-Spin Coupling of feV-scale Axions Open
Ultralight axion-like particles can contribute to the dark matter near the Sun, leading to a distinct, stochastic signature in terrestrial experiments. We search for such particles through their neutron-spin coupling by re-analyzing approx…
Stochastic properties of ultralight scalar field gradients Open
Ultralight axion-like particles are well-motivated dark matter candidates that are the target of numerous direct detection efforts. In the vicinity of the Solar System, such particles can be treated as oscillating scalar fields. The veloci…
Comagnetometer probes of dark matter and new physics Open
We discuss the use of comagnetometry in studying new physics that couples to fermionic spin. Modern comagnetometry is -- in absolute energy units -- the most sensitive experimental technique for measuring the energy difference between quan…
Comment on “Search for Axionlike Dark Matter with a Liquid-State Nuclear Spin Comagnetometer” Open
We comment on arXiv:1901.10843, pointing out that its constraint on\nultra-low-mass axions is incompatible with the duration of the data set\ndescribed. We describe a simple way to analyze such data that gives the correct\nscaling.\n
New Limit on the Permanent Electric Dipole Moment of $^{129}$Xe using $^{3}$He Comagnetometry and SQUID Detection Open
We report results of a new technique to measure the electric dipole moment of $^{129}$Xe with $^3$He comagnetometry. Both species are polarized using spin-exchange optical pumping, transferred to a measurement cell, and transported into a …
Frequency shifts in noble-gas comagnetometers Open
Polarized nuclei are a powerful tool in nuclear spin studies and in searches\nfor beyond-the-standard model physics. Noble-gas comagnetometer systems, which\ncompare two nuclear species, have thus far been limited by anomalous frequency\nv…
Constraints on axionlike dark matter with masses down to $10^{-23}$ eV/c$^2$ Open
We analyzed an 6.7-year span of data from a rotating torsion-pendulum containing $\approx 10^{23}$ polarized electrons to search for the "wind" arising from ultralight, axionlike dark matter with masses between $10^{-23}$ and $10^{-18}$ eV…
A new measurement of the permanent electric dipole moment of $^{129}$Xe using $^{3}$He comagnetometry and SQUID detection Open
We describe a new technique to measure the EDM of $^{129}$Xe with $^3$He comagnetometry. Both species are polarized using spin-exchange optical pumping, transferred to a measurement cell, and transported into a magnetically shielded room, …
Spin precession experiments for light axionic dark matter Open
Axionlike particles are promising candidates to make up the dark matter of the Universe, but it is challenging to design experiments that can detect them over their entire allowed mass range. Dark matter in general, and, in particular, axi…
View article: US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report
US Cosmic Visions: New Ideas in Dark Matter 2017: Community Report Open
This white paper summarizes the workshop U.S. Cosmic Visions: New Ideas in Dark Matter held at University of Maryland on March 23-25, 2017.
Dark matter direct detection with accelerometers Open
The mass of the dark matter particle is unknown, and may be as low as ~$10^{-22}$ eV. The lighter part of this range, below ~eV, is relatively unexplored both theoretically and experimentally but contains an array of natural dark matter ca…