Can dark matter - electron scattering explain the DAMA annual modulation consistent with XENON100 constraints?
arXiv:1508.07402
Abstract
For many years annually modulating keV scintillations have been observed in the DAMA/NaI and DAMA/Libra experiments. A dark matter - electron scattering interpretation is now favoured given the stringent constraints on nuclear recoil rates obtained by LUX, SuperCDMS and other experiments. Very recently, the XENON100 experiment has observed a modest annual modulation in their electron recoil events (2.8 C.L.) with phase consistent with that of the DAMA experiments. However, they also found a stringent upper limit on the unmodulated rate, which suggests that any dark matter - electron scattering interpretation of these annual modulations must involve a large modulation fraction . Here we discuss the extent to which these results might be able to be accommodated within multi-component dark matter models featuring light dark matter particles of mass MeV, focusing on the mirror dark matter case for definiteness. The importance of diurnal variation as a means of testing these kinds of models is also discussed.
This paper used an oversimplified description of a complex problem which is unlikely to be very useful. A better description is given in 1512.06471, which supersedes this paper
References in corpus (12)
- Final model independent result of DAMA/LIBRA-phase1
- Search for an Annual Modulation in a P-type Point Contact Germanium Dark Matter Detector
- Dissipative hidden sector dark matter
- CDMSlite: A Search for Low-Mass WIMPs using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment
- Mirror dark matter: Cosmology, galaxy structure and direct detection
- Investigating electron interacting dark matter
- Diurnal modulation signal from dissipative hidden sector dark matter
- Exclusion of Leptophilic Dark Matter Models using XENON100 Electronic Recoil Data
- Search for An Annual Modulation in Three Years of CoGeNT Dark Matter Detector Data
- Search for Event Rate Modulation in XENON100 Electronic Recoil Data
- Can dark matter - electron scattering explain the DAMA annual modulation signal?
- Electronic and nuclear contributions in sub-GeV dark matter scattering: A case study with hydrogen