Dark Matter Search Results from the PandaX-4T Commissioning Run

TL;DR

This paper presents initial dark matter search results from PandaX-4T, using a large liquid xenon detector with no observed excess, setting new stringent limits on dark matter interactions.

Contribution

First dark matter search results from PandaX-4T using commissioning data with a large liquid xenon detector and new exclusion limits.

Findings

No significant excess observed over background.

Set a new limit on dark matter-nucleon cross section at $3.8\times10^{-47}$ cm$^2$ for 30 GeV/$c^2$ mass.

Used 0.63 tonne-year exposure with 1058 candidate events.

Abstract

We report the first dark matter search results using the commissioning data from PandaX-4T. Using a time projection chamber with 3.7-tonne of liquid xenon target and an exposure of 0.63 tonne$\cdot$year, 1058 candidate events are identified within an approximate nuclear recoil energy window between 5 and 100 keV. No significant excess over background is observed. Our data set a stringent limit to the dark matter-nucleon spin-independent interactions, with a lowest excluded cross section (90% C.L.) of $3.8\times10^{-47} $cm$^2$ at a dark matter mass of 30 GeV/$c^2$.