Towards reliable detection of Low Mass WIMPs (MWIMP < 10 GeV/c2).

by Prof. Andrzej Drukier (BioTraces Inc., 5660 Oak Tanger Ct, Burke, Va. 22015)

Thursday 27 Jun 2013, 11:00 → 12:30 Europe/Berlin

Main-2-313 (MPI fuer Physik)

Weakly Interacting Massive Particles (WIMPs) may constitute most of the matter in the Universe. There are now intriguing results from DAMA/LIBRA, CoGent and CRESST-II, and recently CDMS-Si suggest that there is something at < 10 GeV/c2 mass. CDMS-Ge and l. Xenon detectors suggests that there is no DM candidates with MWIMP > 10 GeV/c2 and MWIMP > 15 . GeV/c2, respectively. The analysis of these events from cryogenic bolometers, suggests that they may be particles with relatively high velocity, say V = 400-500 km/sec, i.e. depends on particles with velocity close to or even beyond the ”escape velocity”. We considered two models of DM halo. In most conservative model, consensus between different detectors can be obtained if one assumes that 5.0 < MWIMP < 7.5 GeV/c2. In the second model 3.0 < MWIMP < 5.0 GeV/c2. Detectors based on low A targets, will considerably facilitate detection of WIMPs by means of “annual modulation effect” (AME) and by means of “diurnal modulation effect” (DME). We describe a new classes of such direct WIMPs detection methods, with focus on low mass WIMPS. These new methods are enabled by use of nano-technology and molecular biology methods.