The XENON1T experiment at Gran Sasso Underground Laboratory is about to start after several years of preparation and installation. The experiment was inaugurated on Nov.11. It uses 3.5 ton of ultra-pure liquid xenon to search for dark matter and will become the largest and most sensitive dark matter detector upon starting.
The XENON1T water tank (left) and service building (right) at the Gran Sasso Underground Laboratory in Italy
The XENON1T Time Projection Chamber (central detector) under final assembling in a clean room
Dark matter experiments usually look for signals of dark matter interacting with the nuclei, and so far there are stringent constraints from liquid xenon experiments. Now, XENON100 experiment also placed tight constrains for dark matter interacting with electrons. With ultra-low electron recoil background in XENON100, the new result rules out the interpretation of DAMA/LIBRA modulation signals as from dark matter electron interaction for some theoretical models. In addition, a search for modulation signals in XENON100’s electronic recoil data also found incompatible result with DAMA/LIBRA. Our group, especially graduate student Fei Gao, has contributed to the event rate analysis and search for modulation signals in XENON100 for the published two papers.
- Exclusion of Leptophilic Dark Matter Models using XENON100 Electronic Recoil Data, Science 349, 851 (2015)
- Search for Event Rate Modulation in XENON100 Electronic Recoil Data, Phys. Rev. Lett. 115, 091302 (2015)
- News from CERN Courier: XENON100 sees no evidence of dark matter interactions with electrons in liquid xenon.