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Jeanne Bang (Brown University)31/03/2023, 17:00Non-directional direct dark matter detectionTalk
When a xenon atom’s nucleus recoils from a dark matter particle or any other incident radiation, the atom’s electron cloud is expected to fall behind, resulting in possible ionization and excitation. This phenomenon is called the Migdal effect and is attracting attention as it can improve the sensitivity of direct dark matter search in the sub-GeV/c$^2$ regime. In a liquid xenon detector like...
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Dr Jingke Xu (Lawrence Livermore National Laboratory)31/03/2023, 17:15Non-directional direct dark matter detectionTalk
The sensitivity of current dark matter experiments to sub-GeV mass dark matter candidates can be substantially improved by the Migdal effect, which predicts a finite probability for a nuclear recoil interaction to be accompanied by atomic excitation or ionization. The additional Migdal energy deposition enhances observable signals in experiments that measure scintillation and ionizations, and...
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Osmond Wen31/03/2023, 17:30
Kinetic inductance detectors (KIDs) as low mass dark matter detectors are interesting for two reasons: 1) their massive multiplexability and concomitant position resolution enable NR/ER discrimination down to 500eV recoil energy, allowing for neutrino-limited NRDM searches from 0.5GeV-5GeV, and 2) a variety of RF-based and KID-specific improvements chart an attainable path forward to sub-eV...
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Philippe Di Stefano31/03/2023, 17:45Talk
Potassium-40 (40K) is a naturally-occurring radioactive isotope. It is a background in rare-event searches, plays a role in geochronology, and has a nuclear structure of interest to theorists. This radionuclide decays mainly by beta emission to calcium, and by electron-capture to an excited state of argon. The electron-capture decay of 40K directly to the ground state of argon has never been...
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Federico Gabriele (Universita e INFN, Cagliari (IT))31/03/2023, 18:00Non-directional direct dark matter detectionTalk
The search for Dark Matter is one of the most fascinating themes of modern physics and astrophysics, but also one of the most difficult to study. The innovative Underground Argon Project (UAr) is part of this context and a fundamental pillar of the Argon Dark Matter search program, led by the Global Argon Dark Matter Collaboration. The aims of the UAr project is to achieve the procurement of...
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Hao Chen31/03/2023, 18:15Non-directional direct dark matter detectionTalk
We are developing a dual-phase crystalline/vapor xenon time projection chamber (TPC) as a potential upgrade path for the LZ or XENON dark matter search experiments, after they finish their current experimental operations. We expect it to enable full exclusion or tagging of the dominant radon-chain backgrounds in these instruments, while maintaining all of the known instrumental benefits and...
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Prof. Eric Dahl31/03/2023, 18:30Talk
Liquid-noble bubble chambers provide a unique opportunity to extend electron/nuclear-recoil discrimination to the O(100)-eV thresholds needed for a GeV-scale dark matter search, while maintaining scalability to the ~ton-year exposures needed to explore the solar neutrino CEvNS fog. I will review what we currently know about the low-threshold performance of these devices and give a status...
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Sunil Golwala31/03/2023, 18:45Non-directional direct dark matter detectionTalk
The SuperCDMS Collaboration is currently building SuperCDMS SNOLAB, an experiment designed to search for nucleon-coupled dark matter in the 0.5-5 GeV/c$^2$ mass range. Looking to the future, the Collaboration has developed a set of experience-based upgrade scenarios, as well as novel directions, to extend the search for dark matter using the SuperCDMS technology in the SNOLAB facility. The...
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