Astrophysical uncertainties in dark matter halo models produce O(1% to 100%) fractional deviations in predicted single-phonon rates, but can be captured by parameter variations within the Standard Halo Model after rms-matching.
Detectability of Light Dark Matter with Superfluid Helium
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abstract
We show that a two-excitation process in superfluid helium, combined with sensitivity to meV energy depositions, can probe dark matter down to the ~keV warm dark matter mass limit. This mass reach is three orders of magnitude below what can be probed with ordinary nuclear recoils in helium at the same energy resolution. For dark matter lighter than $\sim 100$ keV, the kinematics of the process requires the two athermal excitations to have nearly equal and opposite momentum, potentially providing a built-in coincidence mechanism for controlling backgrounds.
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For sub-GeV dark matter, the light and heavy mediator mass limits in direct detection are separated by up to three orders of magnitude in mediator mass, enabling precise sensitivity calculations for Si, Ge, and DAMIC-M targets.
Curvature of the angular spectrum of dark matter events in directional 2D detectors encodes the dark matter mass scale.
Proposes entangled electron qubits on helium in a double-well trap as a quantum sensor concept for enhanced sensitivity in particle physics.
citing papers explorer
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Astrophysical Uncertainties in Sub-GeV Dark Matter Detection via Single Phonon Excitations
Astrophysical uncertainties in dark matter halo models produce O(1% to 100%) fractional deviations in predicted single-phonon rates, but can be captured by parameter variations within the Standard Halo Model after rms-matching.
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Electronic Direct Detection of Light Dark Matter with Intermediate-Mass Mediators
For sub-GeV dark matter, the light and heavy mediator mass limits in direct detection are separated by up to three orders of magnitude in mediator mass, enabling precise sensitivity calculations for Si, Ge, and DAMIC-M targets.
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Extracting Dark-Matter Mass from Angular Scanning
Curvature of the angular spectrum of dark matter events in directional 2D detectors encodes the dark matter mass scale.
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Electrons on Helium and Entangled Quantum Sensors for Particle Physics
Proposes entangled electron qubits on helium in a double-well trap as a quantum sensor concept for enhanced sensitivity in particle physics.