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 × year will suffice to exclude spin-independent WIMP-nucleon cross sections ranging from 10−9 pb to 10−10 pb.
@article{arxiv.0805.0694,
title = {Direct WIMP identification: Physics performance of a segmented noble-liquid target immersed in a Gd-doped water veto},
author = {A Bueno and M C Carmona and A J Melgarejo},
journal= {arXiv preprint arXiv:0805.0694},
year = {2009}
}
Comments
17 pages, 5 figures. Version accepted for publication in JCAP