Dark matter search experiment with CaF2(Eu) scintillator at Kamioka Observatory

Abstract

We report recent results of a WIMP dark matter search experiment using 310g of CaF2(Eu) scintillator at Kamioka Observatory. We chose a highly radio-pure crystal, PMTs and radiation shields, so that the background rate decreased considerably. We derived limits on the spin dependent WIMP-proton and WIMP-neutron coupling coefficients, a_p and a_n. The limits excluded a part of the parameter space allowed by the annual modulation observation of the DAMA NaI experiment.

arXiv comment11 pages, 4 figures

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• Scintillating bolometers: a key for determining WIMP parameters
• Pulse-Shape Discrimination of CaF2(Eu)
• Gamma Ray and Neutrino Flux from Annihilation of Neutralino Dark Matter at Galactic Halo Region in mAMSB Model
• Scintillation light increase of carbontetrafluoride gas at low temperature