Moderadores
Dark Matter: Direct Detection
- Madeleine Zurowski (University of Toronto)
Dark Matter: Direct Detection
- Madeleine Zurowski (University of Toronto)
Dark Matter: Direct Detection
- Karoline Schaeffner (Max-Planck Institute for Physics)
Dark Matter: Direct Detection
- Karoline Schaeffner (Max-Planck Institute for Physics)
XENONnT, located at the Laboratori Nazionali del Gran Sasso (LNGS) in Italy, is a direct dark matter detection experiment designed to search primarily for Weakly Interacting Massive Particles (WIMPs) using a dual-phase xenon Time Projection Chamber (TPC). Thanks to its ultra-low background environment, the XENONnT detector is also sensitive to a variety of other rare-event physics channels. In...
PandaX-4T is a multi-tonne-scale dark matter direct searching experiment, utilizing 3.7 tonne liquid xenon as target material in sensitive volume. The experiment is located at China Jinping Underground Laboratory, with overburden of 2400 meter water equivalent. In 2021, the PandaX-4T experiment has released its first data and obtained various search result at the time. In this talk, I will...
The LUX-ZEPLIN (LZ) experiment is primarily designed to search for interactions of dark matter in the form of weakly-interacting massive particles (WIMPs) using a 7 tonne dual-phase xenon time projection chamber. LZ is located at the Sanford Underground Research Facility in Lead, South Dakota, where it has been acquiring science data since 2021. Recently, with a combined exposure of 4.2...
The PICO Collaboration uses bubble chamber technology for direct-detection searches of Weakly-Interacting Massive Particles (WIMP). Filled with superheated C$_3$F$_8$, the thermodynamic threshold of PICO detectors can be set such that the detectors are optimised for dark matter detection while being insensitive to gammas from electron recoils. The presence of fluorine atoms in the C$_3$F$_8$...
DEAP-3600 is an experiment performing direct dark matter searches since 2016. The detector is undergoing a third fill in order to achieve its goal sensitivity of 1e-46 cm2 for the WIMP-nucleon interaction cross section. This science case is achievable thanks to its location 2 km underground at SNOLAB, a thorough RnD to minimize its background and the background discrimination capabilities...
The DarkSide-20k experiment is a next-generation multi-ton dark matter detector currently being built at the INFN Gran Sasso National Laboratory (LNGS) and designed for zero instrumental background direct detection of Weakly Interacting Massive Particle Dark Matter. The DarkSide-20k detector is a dual-phase time projection chamber (TPC) deploying 50 tonnes of underground low-radioactivity...
The DarkSide-20k experiment, currently under construction at the Laboratori Nazionali del Gran Sasso (LNGS), has been designed to lead the search for heavy WIMPs. While liquid argon offers powerful pulse-shape discrimination, its intrinsic cosmogenic Ar-39 activity (0.96 Bq/kg) poses is a show-stopper for multi-tonne dual-phase Time Projection Chambers. To address this, and following the...
LUX-ZEPLIN (LZ) is a dark matter experiment located at the Sanford Underground Research Facility in South Dakota, USA, employing a 7 tonne active volume of liquid xenon in a dual-phase time projection chamber. Its deep underground location and an extensive material assay program enable LZ to have achieved an observed background level of 6.3±0.5×10$^{−5}$ events/keVee/kg/day in the WIMP search...
DarkSide-20k is a next-generation, direct dark matter search experiment
located at LNGS (Italy), aiming for a background-free exposure of 200 tonne-years,
i.e < 0.1 neutron WIMP-like event. The core of the detector is a dual-phase
Time Projection Chamber (TPC) filled with 50 tonnes of low radioactivity
liquid argon. The entire TPC wall is surrounded by a 15 cm of pure
polymethylmethacrylate...
The Global Argon Dark Matter Collaboration is currently developing its flagship detector,
DarkSide-20k (DS-20k), a multi-tonne-scale experiment designed for the direct detection of the
weakly interacting massive particles using a double-phase Liquid Argon Time Projection
Chamber (LAr TPC) with 20.2 tonnes of fiducial mass. The shift from its predecessor,
DarkSide-50, with 46.4 kg of active...
Darkside-20k is a global direct dark matter search experiment situated underground at LNGS (Italy), designed to reach a total exposure of 200 tonne-years, nearly free from instrumental backgrounds. The core of the detector is a dual-phase Time Projection Chamber (TPC) filled with 50 tonnes of low-radioactivity liquid argon. The entire TPC wall is surrounded by polymethylmethacrylate (PMMA),...
The Relic Axion Detector Exploratory Setup (RADES) collaboration works on the development of new techniques for axion searches. Axions are hypothetical pesudoscalar pseudoNambu-Goldstone bosons that appear as part of the solution to the the strong CP problem of QCD. At the same time they could also be the answer to one of the most puzzling questions on cosmology, the Dark Matter problem.
In...
BabyIAXO is the initial stage of the International Axion Observatory (IAXO), designed to search for solar axions and axion-like particles (ALPs) with unprecedented sensitivity. It incorporates a straight, large-aperture dipole magnet, precision X-ray optics, and ultra-low background detectors, enabling both early-stage data acquisition and validation of the experimental approach for the...
The DAMIC-M (DArk MAtter in CCDs at a Modane) collaboration aims to directly detect dark matter in Charge-Coupled-Devices (CCDs). Utilizing fully depleted CCDs and a floating-gate (“skipper”) amplifier, the detector — operated deep underground at the Laboratoire Souterrain de Modane (LSM) — can resolve eV-scale interactions of Hidden Sector Dark Matter. The Low Background Chamber (LBC), the...
The SuperCDMS SNOLAB experiment is an upcoming direct detection dark matter experiment using semiconductor crystal detectors operated at cryogenic temperatures. The experiment is located 2 km underground in the Creighton mine at Sudbury, Canada. With low background from cosmic sources, SNOLAB is ideal for rare event searches. The experiment uses 24 detectors, made of silicon and germanium,...
The TESSERACT experiment, a novel and fully funded new type of low-mass DM experiment, is achieving new sensitivities in the search for sub-GeV dark matter. We're deploying multiple complementary targets read out via ultra-sensitive TES-based athermal phonon detectors Each detector is uniquely tailored to detect nuclear-, electron-, and dark photon-type dark matter interactions. By using...
Tonne-scale noble liquid detectors have set strong limits on Dark Matter (DM) candidates particularly above a few GeV/c², while the parameter space for Light Dark Matter (LDM) remains largely unexplored. A sub-keV energy threshold and large exposures are essential to tackle this challenge. Solid state detectors can achieve energy thresholds in the order of 1 eV, but their relatively small...
The ANAIS (Annual modulation with NaI(Tl) Scintillators) experiment is intended to search for dark matter annual modulation with ultrapure NaI(Tl) scintillators in order to provide a model independent confirmation or refutation of the long-standing DAMA/LIBRA positive annual modulation signal in the low energy detection rate, using the same target and technique. Other experiments exclude the...
SABRE is an international collaboration that will operate similar particle de-
tectors in the Northern (SABRE North) and Southern Hemispheres (SABRE
South). This innovative approach distinguishes possible dark matter signals
from seasonal backgrounds, a pioneering strategy only possible with a southern
hemisphere experiment. SABRE South is located at the Stawell Underground
Physics Laboratory...
By employing high-purity NaI as a cryogenic bolometer target material, the upcoming COSINUS experiment aims at providing a definitive crosscheck of the DAMA/LIBRA dark matter claim within the next few years. This approach is made possible through the dedicated „remoTES" detector design, which allows to readout the NaI crystal using a transition edge sensor without exposing it to fabrication...
Superfluid helium-3 bolometers can exploit the extremely low superfluid gap ($10^{-7}$ eV) to give ultra-low energy threshold dark matter direct detection searches. These can probe dark matter models with sub-GeV/c$^2$ masses, in particular offering world-leading sensitivity to spin-dependent interactions. Realising this requires operation at ultra-low temperatures in the 100s μK regime, where...
Composite dark matter models, where dark matter exists in bound states formed in the early universe, have long been a source of scientific interest. I will focus on loosely bound dark matter composite states, where the binding energy per constituent is small compared to the constituent’s bare mass. If this binding energy is sufficiently small, scattering with Standard Model nuclei will...
The recent observation of coherent elastic neutrino-nucleus scattering (CE$\nu$NS) from solar $^8$B neutrinos by the XENONnT and PandaX-4T collaborations marks the onset of the neutrino fog in direct dark matter detection experiments. This opens up new possibilities to explore the interplay between CE$\nu$NS and WIMP-nucleus scattering within a common theoretical framework. In this work, we...
Inelastic dark matter (IDM) models feature an energy threshold for scattering with Standard Model particles, which enables their consistency with the increasingly stringent limits placed by direct detection experiments. In a typical construction, elastic scattering is absent at tree level, and a lighter dark matter state must upscatter into a heavier state in order to interact with the nuclei...
Atomic transitions are among the most studied and precisely measured phenomena in physics, making them an attractive probe for new physics. If dark matter (DM) interacts with electrons, it could trigger electronic transitions via the absorption or scattering of DM with the atom's electrons. The selection rules for these transitions depend on the Lorentz structure of the DM interaction. An...
The DAMIC-M collaboration recently reported impressive bounds on sub-GeV dark matter, robustly testing both thermal and non-thermal models for the very first time. In this work, we derive novel bounds from the recent PandaX-4T ionization S2-only search for Coherent Elastic Neutrino Nucleus Scattering (CEνNS). We find that the PandaX-4T S2-only data is able to compete with the DAMIC-M results,...
I combine the non-relativistic effective theory of dark matter (DM) - electron interactions with linear response theory to obtain a formalism that fully accounts for screening and collective excitations in DM-induced electronic transition rate calculations for general DM-electron interactions. In the same way that the response of a dielectric material to an external electric field in...
As the search for dark matter progresses, it is useful to refine past and future searches for heavy dark matter, including for dark matter masses well above a TeV. We show the importance of properly modeling the local dark matter velocity distribution, beyond the standard Maxwellian halo model, and in particular how accurate modeling of the Large Magellanic Cloud and Milky Way impact heavy...
