Conveners
Dark Matter: Parallel I
- Juergen Reichenbacher (South Dakota School of Mines and Technology)
Dark Matter: Parallel II
- Varun Vaidya (University of South Dakota)
Dark Matter: Parallel III
- Joshua Berger (Colorado State University)
PandaX-4T is a deep-underground experiment that searches for rare events using a dual-phase liquid xenon time projection chamber. The detector has an active volume containing 4 tons of liquid xenon. Recently, PandaX-4T has completed the first two runs of data collection. In this talk, the latest search results on dark matter, B8 and pp solar neutrinos, as well as neutrinoless double beta decay...
LUX-ZEPLIN(LZ) is a direct detection dark matter experiment located nearly a mile underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. Employing a dual-phase Time Projection Chamber (TPC) containing 7 tonnes of active xenon surrounded by veto systems, LZ presents a world-leading sensitivity in detecting Weakly Interacting Massive Particles (WIMPs), a...
The LZ experiment is a dual-phase liquid xenon Time Projection Chamber (TPC) located at the Sanford Underground Research Facility (SURF) to detect Weakly Interacting Massive Particles (WIMPs). Dual-phase TPCs are designed to observe interactions that either excite or ionize a medium via a prompt scintillation (S1) at the interaction site and a delayed amplified signal (S2) in the extraction...
The DarkSide-20k liquid-argon dark-matter detector is a two phase TPC currently under construction at Laboratori Nazionali del Gran Sasso (LNGS) in Italy. It is the next phase in the Global Argon dark Matter Collaboration’s efforts and will start operations in 2026. The 50-tonne (20-tonne fiducial) mass of low radioactivity underground argon will comprise a two-phase time projection chamber...
We investigate the phenomenology of light GeV-scale fermionic dark matter in $U(1)_{L_\mu - L_{\tau}}$ gauge extension of the Standard Model. Heavy neutral fermions alongside with a $S_1(\overline{3}$,$1$,$1/3$) scalar leptoquark and an inert scalar doublet are added to address the flavor anomalies and light neutrino mass respectively. The light gauge boson associated with...
The CRESST experiment (Cryogenic Rare Event Search with Superconducting Thermometers) focuses on detecting dark matter particles scatter off nuclei in cryogenic detectors using different materials such as CaWO$_4$, Al$_2$O$_3$, LiAlO$_2$, and Si. Capable of identifying nuclear recoils with detection thresholds as low as 10 eV, CRESST is highly effective in the pursuit of low mass dark matter...
The low mass (< 10 GeV/$c^2$) dark matter parameter space presents several candidates of interest, but requires devices with excellent energy resolution operated in ultra-low background environments to perform meaningful searches. SuperCDMS SNOLAB is a broadband direct dark matter search experiment projected to achieve world-leading sensitivity under 5 GeV/$c^2$ mass for nucleon-coupled dark...
The DAMIC-M (DArk Matter In CCDs at Modane) experiment will use skipper CCDs to search for low mass (sub-GeV) dark matter underground at the Laboratoire Souterrain de Modane (LSM). With a kg-scale silicon target mass and sub-electron energy resolution, the detector will surpass the exposure and threshold of previous experiments. Thus, DAMIC-M will have world-leading sensitivity to a variety of...
The TESSERACT experiment will perform direct-detection searches for MeV-scale dark matter using transition-edge sensors (TESs) and multiple cryogenic target materials. The target materials (superfluid helium-4, gallium arsenide, and polar sapphire) are complementary to dark matter searches in the MeV range, and each produces photon and quasiparticle signals. Comparing these signals will allow...
We are going to present the CYGNO/INITIUM project for the development of a high precision optical readout gaseous Time Projection Chamber (TPC) for directional Dark Matter search and solar neutrino spectroscopy, to be hosted at Laboratori Nazionali del Gran Sasso (LNGS). CYGNO peculiar features are the use of sCMOS cameras and PMTs coupled to a multiple GEM amplification structure to readout a...
Readout cables for signal sensors are a fundamental component of rare event searches for dark matter and neutrinoless double beta decay. While they possess unique electrical and mechanical properties, polyimide-based flexible cables can be a significant contributor to the total detector background, due to their relatively high content of long-lived primordial radionuclides like 238U and 232Th...
Achieving detector-grade germanium crystals necessitates employing advanced purification methods to eliminate impurities from standard-grade materials. At the University of South Dakota, we specialize in a meticulous zone refining process tailored to ensure exceptional purity and quality. In this presentation, we delve into the nuances of semiconductor types and provide an overview of how...
This work explores a fascinating oddity in semiconductor dielectric behavior at very low temperatures, with a particular focus on germanium detectors operating at helium temperatures. The relative capacitance rapidly decreases below 11 K and stabilizes at 6.5 K, which is similar to the fully depleted state that was measured at 77.8 K under ambient circumstances. Interestingly, this...
