Thursday, March 5, 2020, 16:00
Ben Kilminster, Zurich University
The consensus is that dark matter exists, but its mass and its interactions beyond gravitational are speculative. The similarity of the relic dark matter density with that of baryons may provide a clue. This relic density may have freezed out, or perhaps freezed in. Dark matter may be weakly interacting, or instead could interact electromagnetically if it is part of a hidden sector that mixes with the standard model. It is therefore necessary to cast a wide net for dark-matter candidates that are consistent with constraints. Specialized CCD detectors can be used to measure very small ionization signals of only a few electrons. In a carefully designed experiment, such measurements can provide constraints on a range of dark-matter candidates spanning 10 orders of magnitude in mass. Results from DAMIC (Dark Matter in CCDs) experimental data taken at SNOLAB and prospects of DAMIC-M at Laboratoire souterrain de Modane will be discussed.