Dark matter is a hypothetical matter in the universe introduced to coherently explain observations ranging from the scale of galaxies to the whole of the universe. The DarkSide program is a direct dark matter detection experiment that utilizes dual-phase argon time projection chambers. Its preceding experiment, DarkSide-50, has set the most stringent exclusion limits for several dark matter candidates. Owing to its peculiar behaviour, dark matter can also be searched for in a model-independent way exploiting the expected fluctuation of the relative velocity between dark matter and the Earth. In this talk, I will present the result of the search for an event rate modulation caused by such a fluctuation using argon for the first time, following an overview of the dark matter searches in DarkSide. Furthermore, I will describe efforts towards two next generation dark matter experiments, DarkSide-20k, that is under construction at an underground laboratory, and DarkSide-LowMass, newly proposed detector optimized for light dark matter detection.
The seminar will be held in English. Everyone can join the seminar
freely. We look forward to your participation.