Limits on spin-dependent WIMP-nucleon cross-sections from the first ZEPLIN-II data
G. J. Alner et al. (ZEPLIN-II Collaboration)
TL;DR
This paper reports the first results from ZEPLIN-II, setting new limits on spin-dependent WIMP-nucleon interactions using a two-phase xenon detector for dark matter detection.
Contribution
It provides the first experimental limits on spin-dependent WIMP-proton and WIMP-neutron cross-sections from ZEPLIN-II data.
Findings
WIMP-neutron cross-section limit of 0.07 pb at 65 GeV WIMP mass
First underground data run constrains spin-dependent interactions
Results improve understanding of WIMP interaction properties
Abstract
The first underground data run of the ZEPLIN-II experiment has set a limit on the nuclear recoil rate in the two-phase xenon detector for direct dark matter searches. In this paper the results from this run are converted into the limits on spin-dependent WIMP-proton and WIMP-neutron cross-sections. The minimum of the curve for WIMP-neutron cross-section corresponds to 0.07 pb at a WIMP mass of around 65 GeV.
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