We examine in depth a recent proposal to utilize superfluid helium for direct detection of sub-
MeV mass dark matter. For sub-keV recoil energies, nuclear scattering events in liquid …

Fundamental neutron physics, combining precision measurements and theory, probes
particle physics at short range with reach well beyond the highest energies probed by the …

A cryogenic apparatus is described that enables a new experiment, nEDM@ SNS, with a
major improvement in sensitivity compared to the existing limit in the search for a neutron …

We consider a model of sub-GeV dark matter whose interaction with the Standard Model is
mediated by a new vector boson (the dark photon) which couples kinetically to the photon …

This whitepaper presents the research priorities decided on by attendees of the 2022 Town
Meeting for Fundamental Symmetries, Neutrons and Neutrinos, which took place December …

Dark matter (DM) is one of the most critical questions to be understood and answered in
fundamental physics today. Observations with varied astronomical and cosmological …

Novel experimental techniques are required to make the next big leap in neutron electric
dipole moment experimental sensitivity, both in terms of statistics and systematic error …

We report results from a study on electrical breakdown in liquid helium using near-uniform-
field stainless steel electrodes with a stressed area of∼ 0.7 cm 2⁠. The distribution of the …

The dependence on applied electric field (0–40 kV/cm) of the scintillation light produced by
fast electrons and α particles stopped in liquid helium in the temperature range of 0.44 K to …

As noble liquid time projection chambers grow in size their high voltage requirements
increase, and detailed, reproducible studies of dielectric breakdown and the onset of …