Results of Dark Matter Search using the Full PandaX-II Exposure

TL;DR

This paper reports the results of a dark matter search using the PandaX-II experiment with the full dataset, setting new upper limits on dark matter interactions with nucleons.

Contribution

First comprehensive analysis of the full PandaX-II dataset, providing the most stringent limits on spin-independent dark matter-nucleon cross sections to date.

Findings

No significant excess of events observed

Set upper limits on dark matter-nucleon cross section

Achieved lowest exclusion limit of 2.2×10⁻⁴⁶ cm² at 30 GeV/c²

Abstract

We report the dark matter search results obtained using the full 132 ton$\cdot$day exposure of the PandaX-II experiment, including all data from March 2016 to August 2018. No significant excess of events is identified above the expected background. Upper limits are set on the spin-independent dark matter-nucleon interactions. The lowest 90% confidence level exclusion on the spin-independent cross section is $2.2\times 10^{-46}$ cm$^2$ at a WIMP mass of 30 GeV/$c^2$.