PANDAX-II DARK MATTER DETECTOR AND ITS FIRST RESULTS
type: CreativeWork
description: The particle physics nature of dark matter (DM) is one of the most fundamental scientific questions nowadays. The leading candidates, weakly interacting massive particles (WIMPs), can be directly detected by looking for WIMP-nucleus scattering events in deep underground laboratories. Since the 1980s, physicists have improved the sensitivity of direct DM detection by about seven orders of magnitude. In the last decades, dual-phase xenon detectors exhibit their advantages in background rejection and scalability and lead the sensitivity in high mass WIMP direct searches. Experiments in XENON and LUX projects have been continuously pushing the exclusion limits of the elastic WIMP-nucleon scattering cross section into the parameter space predicted by various theoretical models. The Particle and astrophysical Xenon (PandaX) project is a series of xenon- based ultra-low background experiments in the China Jinping Underground Laboratory (CJPL) targeting the unknown physics of DM. The first stage of the project, the PandaX-I experiment, with a 120 kg sensitive liquid xenon (LXe) target, performed the WIMP search in 2014 with a 54×80.1 kg-day exposure. PandaX-I reported a strong limit on the WIMP-nucleon cross section for a WIMP mass of less than 10 GeV/c2, strongly disfavoring all positive claims from other experiments. The construction and installation of the second stage, PandaX-II experiment, with a half-ton scale LXe target, commenced after PandaX-I. In 2015, PandaX- II reported a WIMP search result with a 306×19.1 kg-day exposure from a short physics commissioning run with a notable 85Kr background. With 580 kg LXe in the sensitive region, PandaX-II was the largest running dual-phase xenon detector before the XENON1T detector in 2017. PandaX-II reported the most stringent limit on the WIMP-nucleon scattering cross section at 2.5×10−46 cm2 for the WIMP mass 40 GeV/c2 with a total exposure of 33 ton-day in 2016 and updated the limit to 8.6×10−47 in 2017 with a total expos…
abstract: The particle physics nature of dark matter (DM) is one of the most fundamental scientific questions nowadays. The leading candidates, weakly interacting massive particles (WIMPs), can be directly detected by looking for WIMP-nucleus scattering events in deep underground laboratories. Since the 1980s, physicists have improved the sensitivity of direct DM detection by about seven orders of magnitude. In the last decades, dual-phase xenon detectors exhibit their advantages in background rejection and scalability and lead the sensitivity in high mass WIMP direct searches. Experiments in XENON and LUX projects have been continuously pushing the exclusion limits of the elastic WIMP-nucleon scattering cross section into the parameter space predicted by various theoretical models. The Particle and astrophysical Xenon (PandaX) project is a series of xenon- based ultra-low background experiments in the China Jinping Underground Laboratory (CJPL) targeting the unknown physics of DM. The first stage of the project, the PandaX-I experiment, with a 120 kg sensitive liquid xenon (LXe) target, performed the WIMP search in 2014 with a 54×80.1 kg-day exposure. PandaX-I reported a strong limit on the WIMP-nucleon cross section for a WIMP mass of less than 10 GeV/c2, strongly disfavoring all positive claims from other experiments. The construction and installation of the second stage, PandaX-II experiment, with a half-ton scale LXe target, commenced after PandaX-I. In 2015, PandaX- II reported a WIMP search result with a 306×19.1 kg-day exposure from a short physics commissioning run with a notable 85Kr background. With 580 kg LXe in the sensitive region, PandaX-II was the largest running dual-phase xenon detector before the XENON1T detector in 2017. PandaX-II reported the most stringent limit on the WIMP-nucleon scattering cross section at 2.5×10−46 cm2 for the WIMP mass 40 GeV/c2 with a total exposure of 33 ton-day in 2016 and updated the limit to 8.6×10−47 in 2017 with a total expos…
author: TAN, ANDI
language: en
date published: 2019
date modified: 2026-07-24T03:02:17Z
provider: University of Maryland
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Maryland

PropertyValue
property ID: Handle
value: http://hdl.handle.net/1903/24986

PropertyValue
property ID: DOI
value: 10.13016/dobq-0gzi