PandaX-xT: a Multi-ten-tonne Liquid Xenon Observatory at the China Jinping Underground Laboratory

Abstract

We propose a major upgrade to the existing PandaX-4T experiment in the China Jinping Underground Laboratory. The new experiment, PandaX-xT, will be a multi-ten-tonne liquid xenon, ultra-low background, and general-purpose observatory. The full-scaled PandaX-xT contains a 43-tonne liquid xenon active target. Such an experiment will significantly advance our fundamental understanding of particle physics and astrophysics. The sensitivity of dark matter direct detection will be improved by nearly two orders of magnitude compared to the current best limits, approaching the so-called "neutrino floor" for a dark matter mass above 10 GeV/$c^2$, providing a decisive test to the Weakly Interacting Massive Particle paradigm. By searching for the neutrinoless double beta decay of ${}^{136}$Xe isotope in the detector, the effective Majorana neutrino mass can be measured to a [10 -- 41] meV/$c^2$ sensitivity, providing a key test to the Dirac/Majorana nature of neutrino s. Astrophysical neutrinos and other ultra-rare interactions can also be measured and searched for with an unprecedented background level, opening up new windows of discovery. Depending on the findings, PandaX-xT will seek the next stage upgrade utilizing isotopic separation on natural xenon.

version as published on SCPMA

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Cited by in corpus (26)

• The XLZD Design Book: Towards the Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• New Physics Search at the CEPC: a General Perspective
• Neutrinoless Double Beta Decay Sensitivity of the XLZD Rare Event Observatory
• Searching for Neutrinoless Double-Beta Decay of ${}^{136}$Xe with PandaX-4T
• Insights into Dark Matter Direct Detection Experiments: Decision Trees versus Deep Learning
• Ultra-sensitive radon assay using an electrostatic chamber in a recirculating system
• Testing the dark side of neutrino oscillations with the solar neutrino fog at Dark Matter experiments
• Light Dark Matter Search with 7.8 Tonne-Year of Ionization-Only Data in XENONnT
• Search for Solar Boosted Dark Matter Particles at the PandaX-4T Experiment
• Two-component Dark Matter and low scale Thermal Leptogenesis
• Development & Characterization of Electrodes for large-scale Xenon Time Projection Chambers
• Probing Leptophobic Dark Sectors via Gravitational Wave Signatures
• Postsphaleron darkogenesis
• Measuring the Low-Energy Weak Mixing Angle with Supernova Neutrinos
• Calculation and comparison of sensitivities in $0\nu \beta \beta$ experiments based on key parameters
• Characterizing CJPL's Site-Specific Neutrino Floor as the Neutrino Fog Boundary
• Characterization of external cross-talk from silicon photomultipliers in a liquid xenon detector
• Dark matter in the scale-invariant 3-3-1-1 model
• Probing mixed-state dark matter and flavor observables in a scalar-assisted baryonic gauge theory
• AURORA: A High Performance Software DAQ Framework for Next-Generation Rare-Event Search Experiments
• A flexible test facility for liquid xenon detector development
• Design, construction, and testing of the PandaX-xT cryogenics system
• Sensitivity of neutrinoless double beta decays from a combined analysis of ground and excited states
• Shedding Light on Dark Matter at the LHC with Machine Learning
• Dark Matter Clumps as Sources of Gravitational-Wave Glitches in LIGO/Virgo/KAGRA data
• Physical implications of a double right-handed gauge symmetry