Bulletin of the American Physical Society
APS April Meeting 2022
Volume 67, Number 6
Saturday–Tuesday, April 9–12, 2022; New York
Session Q08: Mini-symposium: Innovative Dark Matter Detection IIIMini-Symposium Recordings Available
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Sponsoring Units: DPF Chair: Michael Kordosky, William & Mary Room: Juilliard |
Monday, April 11, 2022 10:45AM - 11:21AM |
Q08.00001: Laboratory searches for GUT-scale axion dark matter beyond the magnetoquasistatic limit Invited Speaker: Benjamin R Safdi In the coming years laboratory experiments such as ABRACADABRA and DMRadio will cover some of the most well-motivated territory for axion dark matter. In particular, they will probe QCD axion masses and photon couplings that could be associated with axions produced at the scale of grand unification. However, to-date the sensitivity projections for these experiments have relied on the magnetoquasistatic approximation, which assumes that the quantum wavelength of the axion is much larger than the size of the experiment. Here, we present first results for understanding the response of ABRACADABRA and DMRadio type axion detectors beyond the magnetoquasistatic limit. We show that the sensitivity of these experiments degrades rapidly when the Compton wavelength is smaller than the detector size, but we also present possible novel detector modifications that could extend the sensitivity of the detectors to higher masses. |
Monday, April 11, 2022 11:21AM - 11:33AM |
Q08.00002: Constraining EeV-Scale Dark Matter with Neutrino Observatories Using Tau Regeneration Jeffrey P Lazar In 2016 and 2018, the ANITA collaboration reported the observation of two anomalous events, with polarizations consistent with up-going neutrinos, but coming from too far below the horizon to actually make it through the Earth given their energies. While all Standard Model (SM) explanations of these events have been ruled out, explanations from beyond Standard Model scenarios have been put forth in the literature, including scenarios in which these events arise from heavy dark matter decay to SM particles. In this contribution, we use tau neutrino regeneration to constrain one such explanation. Using ANTARES and IceCube public data, we look for an excess of neutrinos coming from this dark matter decaying in the Galactic Center and the Sun. Furthermore, we show the first accurate simulation of tau neutrino regeneration in the Sun. |
Monday, April 11, 2022 11:33AM - 11:45AM |
Q08.00003: Detector R&D for HeRALD: The Helium Roton Apparatus for Light Dark Matter Doug Pinckney The HeRALD experiment uses the unique properties of superfluid 4He to study dark matter-nucleon scattering. The detector uses singlet and triplet electronic excitations, and quantum evaporation from vibrational quasiparticles to determine the energy and nature of the particle interaction. In this talk I will present progress towards the observation of the quantum evaporation signal using a next generation athermal phonon detector. I will also discuss the broader R&D program, with an emphasis on the helium and materials physics we will study to refine the detector and push the nuclear recoil detection threshold as low as possible. |
Monday, April 11, 2022 11:45AM - 11:57AM |
Q08.00004: Current status and the upgrade of COSINE-100 experiment Govinda Adhikari COSINE-100 is a direct-detection dark matter search experiment with the goal of testing DAMA/LIBRA's claim of an annual modulation, using the same NaI(Tl) target. The experiment has been collecting physics data since September 2016 at the Yangyang underground laboratory, South Korea. It consists of ~106 kg of low background NaI(Tl) detectors submerged in a 2 tons liquid scintillator veto counter. In this talk, we present the status of COSINE-100, including the recent results on WIMP-nucleus scattering within the context of several dark matter models, and prospects for the next phase, COSINE-200. |
Monday, April 11, 2022 11:57AM - 12:09PM |
Q08.00005: New Results from a Three-Year Annual Modulation Search with COSINE-100 William G Thompson COSINE-100 is a direct detection dark matter search experiment that is testing DAMA/LIBRA's claim of dark matter discovery. Located in South Korea's Yangyang underground laboratory, COSINE-100 comprises 106 kg of sodium iodide detectors surrounded by a ~2000 L liquid scintillator veto. In this talk, I will present new results from an annual modulation search using the first three years of data from COSINE-100. I will also discuss improvements over our previous modulation search, including the lowering of the analysis threshold to 1 keV and the development of a more robust time-dependent background model. In addition, I will review ongoing R&D projects for, and the physics reach of future phases of the experiment. |
Monday, April 11, 2022 12:09PM - 12:21PM |
Q08.00006: Status of the SBC Collaboration's Bubble Chambers for Dark Matter Experiments Matthew J Bressler The Scintillating Bubble Chamber (SBC) collaboration is currently constructing a pair of 10 liter bubble chambers for argon-based low threshold nuclear recoil detection experiments. The first of this pair will be operated at Fermi National Accelerator Laboratory, taking calibration data sets to confirm the expected ability to reach a 100 eV nuclear recoil detection threshold (for bubble nucleation) and test the detector's bubble nucleation and scintillation responses to gamma rays, neutrons, and alphas over a range of thresholds. The second detector will be built to the cleanliness and radiopurity standards of a WIMP dark matter search and will be deployed deep underground at SNOLAB, expecting to initially take a 10 kg-yr exposure. With the 100 eV threshold and 10 kg-yr exposure, the SBC-SNOLAB chamber will be competitive with other planned low-threshold dark matter searches for WIMP-like dark matter with mass between ~1-10 GeV. We present the current status and outlook for these bubble chambers. |
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