Seminarium Teorii Oddziaływań Elementarnych

Weakly Interacting Massive Particles (WIMPs) may constitute a large fraction of the matter in the Universe..The DAMA/LIBRA has seen WIMP-like events for the last decade. Recent analysis has confirmed the annual modulation effect in all 24 active detectors. The analysis of recent events from cryogenic bolometers (CRESST and CDMS-Si ) and semiconducting detector CoGeNT suggests that there may be particles with low mass and relatively high velocity, 400-500 km/sec. For Dark Matter mass between 10 and 200 GeV, the ”exclusion plots” from CDMS-Ge and especially liquid Xenon detectors are very strong. A next generation detector should have considerable advantages over existing detectors in these “hard to detect” part of DM mass and cross-section spectrum, with M_DM below 10 GeV and above 200 GeV. The ability to detect direction of recoil nuclei will considerably facilitate detection of DM candidates using the annual modulation effect (AME) (see DAMA results) and/or by means of the diurnal modulation effect (DME). Detection of the direction specific annual modulation effect (DS-AME) is especially important in the case of low mass DM candidates. There is a need for new signatures and use of low atomic number targets, when M_DM < 10 GeV. We believe that it can be implemented in a new class of biological DM detectors. Two sub-classes are discusseda) DNA based detectors;b) Enzymatic reactions based detectors.