Abstract
In this work, we conducted annual modulation search for dark matter with 2.7 years of data taking with the XMASS-I detector. A total exposure was 800 live days times 832 kg. When we assume Weakly Interacting Massive Particle (WIMP) dark matter elastically scattering on the xenon target, the exclusion upper limit of the WIMP-nucleon cross section was 1.9×10−41cm2 at 8 GeV/c2. For model independent case, without assuming any specific dark matter model, we did not find any modulation signal with a p-value of 0.11 in the 1-20 keV energy region for the null hypothesis.
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