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

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

2008-05-06

arxiv.org/abs/0805.0694v2

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1088/1475-7516/2008/08/019

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.

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