Direct dark matter search by annual modulation with 2.7 years of XMASS-I data

Understand

An annual modulation signal due to the Earth orbiting around the Sun would be one of the strongest indications of the direct detection of dark matter.

• In 2016, we reported a search for dark matter by looking for this annual modulation with our single-phase liquid xenon XMASS-I detector.
• That analysis resulted in a slightly negative modulation amplitude at low energy.
• In this work, we included more than one year of additional data, which more than doubles the exposure to 800 live days with the same 832 kg target mass.