Description
Chair: María Luisa Sarsa
After PandaX-II experiment, we started to build PandaX-4T detector with 4 ton liquid xenon in the sensitive volume at China Jinping Underground laboratory. PandaX-4T experiment has completed detector construction, and detector commissioning has begun since the end of the year 2020. Through the commissioning, we are optimizing the detector operation conditions, testing various calibration...
The bubble chambers of the PICO collaboration use the acoustic signal generated from nucleations to classify nuclear recoil events from alpha decays in the bulk fluid. The success of these detectors in probing the potential WIMP-proton cross section comes in part from the low energy threshold that can be achieved. This nucleation threshold, based on the Seitz model, is dependent on fluid type,...
DarkSide run since mid-2015 a 50-kg-active-mass dual-phase Liquid Argon Time Projection Chamber (TPC), filled with low radioactivity argon from an underground source and produced world-class results for both the low mass (M_WIMP<20 GeV/c^2) and high mass (M_WIMP>100 GeV/c^2) direct detection search for dark matter.
The next stage of the DarkSide program will be a new generation experiment...
DARWIN is a planned 50 ton liquid xenon time-projection-chamber with the primary goal of searching directly for dark matter. It aims to measure nuclear recoils induced by Weakly Interacting Massive Particles (WIMPs) down to WIMP-nucleon cross sections of 1e-48 cm2 at which neutrinos become an irreducible background.
Thanks to its low energy threshold at a few keV, its ultra-low expected...
The WIMP search in 231 live-days of data collected by the DEAP-3600 experiment showed no event candidates, resulting in a world-leading upper limit on the spin-independent dark matter-nucleon cross-section for an argon target. The present study reanalyzed that null result within a Non-Relativistic Effective Field Theory (NREFT) framework, and further examined the impact of potential dark...
DEAP-3600, hosted at SNOLAB, has been designed for the search of WIMPs, Weakly Interacting Massive Particles; its target of 3.3 t of liquid argon makes it the largest direct detection experiment. In addition to its sensitivity to WIMPs, DEAP-3600 is sensitive to super-massive dark matter candidates with masses up to the Planck scale. For particles with masses above 10^{16} GeV and...
The multi-tonne XENONnT detector is the next step in the evolution of the XENON project. The experiment, aimed at direct detection of WIMPs, utilizes 5.9t of instrumented liquid xenon. Dedicated screening results of all detector materials were used to project the expected overall background in the detector, while improvements in suppressing intrinsic backgrounds from electronic recoil sources...
A major worldwide effort is underway to procure the radiopure argon needed for DarkSide-20k (DS-20k), the first large scale detector of the new Global Argon Dark Matter Collaboration. The Urania project will extract and purify underground argon (UAr) from CO2 wells in the USA at a production rate of about 300 kg/day. Additional chemical purification of the UAr will be required prior to its use...
LUX-ZEPLIN (LZ) is a direct dark matter detection experiment currently being commissioned at the 4850’ level of the Sanford Underground Research Facility in Lead, South Dakota. The detector comprises a position sensitive xenon time projection chamber surrounded by an instrumented xenon “skin” and liquid scintillator active vetoes. An active mass of 7 tonnes of xenon is used, from which a...
PandaX-4T is a tonne-scale dark matter direct searching experiment, utilizing 4 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. Recently, the PandaX-4T experiment has finished assembling on site, and started commissioning of the sub-systems. In this talk, I will talk...
The PICO collaboration searches for WIMPs using large superheated liquid detectors, or bubble chambers. Recent results from the complete exposure of the PICO-60 C$_3$F$_8$ detector at SNOLAB set the world’s most stringent limits on WIMP-proton spin-dependent interactions. I will present the current status of the construction and physics potential of the next generation, tonne-scale experiment...
LUX-ZEPLIN (LZ) is a dark matter direct detection experiment currently being commissioned at the Sanford Underground Research Facility (SURF) in Lead, South Dakota. The experiment utilizes a two-phase time projection chamber (TPC) to look for dark matter interactions. The active region of the detector consists of 7 tonnes of liquid xenon with a 5.6 tonne fiducial volume, and is expected to...
