Direct WIMP identification: Physics performance of a segmented noble-liquid target immersed in a Gd-doped water veto

Abstract

We evaluate background rejection capabilities and physics performance of a detector composed of two diverse elements: a sensitive target (filled with one or two species of liquefied noble gasses) and an active veto (made of Gd-doped ultra-pure water). A GEANT4 simulation shows that for a direct WIMP search, this device can reduce the neutron background to O(1) event per year per tonne of material. Our calculation shows that an exposure of one tonne $\times$ year will suffice to exclude spin-independent WIMP-nucleon cross sections ranging from $10^{-9}$ pb to $10^{-10}$ pb.

17 pages, 5 figures. Version accepted for publication in JCAP

References in corpus (7)

• A direct empirical proof of the existence of dark matter
• Strong and weak lensing united III: Measuring the mass distribution of the merging galaxy cluster 1E0657-56
• First results from a Dark Matter search with liquid Argon at 87 K in the Gran Sasso Underground Laboratory
• Neutrino Backgrounds to Dark Matter Searches
• First limits on WIMP nuclear recoil signals in ZEPLIN-II: a two phase xenon detector for dark matter detection
• Limits on spin-dependent WIMP-nucleon cross-sections from the first ZEPLIN-II data
• A Neutron Multiplicity Meter for Deep Underground Muon-Induced High Energy Neutron Measurements