Exploring the 'missing universe' is one of the ultimate scientific goals of humanity, and experimental research on dark matter and neutrinos is the key to revealing these mysteries. Firstly, dark matter and neutrinos are widely present in the universe, playing a dominant role in the formation and evolution of the universe and galaxies. However, we still know very little about the nature of dark matter and the fundamental properties of neutrinos. A large number of theoretical studies have predicted a class of dark matter particles with masses near the energy region (100 GeV), namely WIMPs. Since 1985, there has been an international trend of using high-sensitivity detectors to directly detect collisions between dark matter and atomic nuclei in deep and extremely low background laboratories. In addition, theoretical physicists generally believe that neutrinos are their own antiparticles, namely Majorana fermions. Majorana neutrinos can provide a perfect explanation for the tiny mass of neutrinos, and may also be related to the mystery of the disappearance of antimatter in the evolution of the universe. Neutrinoless double beta decay is the golden channel for searching for Majorana neutrinos.
In recent years, based on the China Jinping Underground Laboratory, a series of dark matter and neutrino experiments have been constructed in China. Among them, the PandaX experiment led by Shanghai Jiao Tong University has developed rapidly and achieved internationally leading results in dark matter and Majorana neutrino searches. The next generation of multi-ten ton experiments, PandaX xT, would be the first to be constructed, which is expected to reveal the essence of dark matter and discover neutrinoless double beta decay processes, expanding human understanding of the universe.
Partner Institutions:
National Key Laboratory of Dark Matter Physics, Key Laboratory of Particle Physics and Cosmology of the Ministry of Education, National Jinping Underground Scientific Infrastructure, Jinping Underground Frontier Science and Dark Matter Sichuan Provincial Key Laboratory
Platform Principal:
WANG Shaobo, Associate Professor, shaobo.wang@sjtu.edu.cn