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Abstract
Dark matter remains a fundamental mystery in particle physics, and extensive efforts have been made to detect it in labs and also from astrophysical observations. In this talk, I will summarize the recent progress in sub-GeV dark matter detection with semiconductors and introduce our new idea to probe sub-MeV dark matter with doped semiconductors. I will also discuss the origin of the unexplored backgrounds in current detectors and demonstrate our new proposed device, called Dual-sided CCD, can significantly reduce some those backgrounds. In astrophysics, we propose to constrain ultra-light bosons (dark matter candidates) with stellar tidal disruption events. I will show that near future LSST may set strong constraints on light bosons in the mass range of 10^-20 eV-10^-18 eV.
Biography
Peizhi Du is currently a postdoc at Rutgers University since 2022. He received his PhD from University of Maryland in 2019 and then moved to Stony Brook University for his first postdoc position (2019-2022). His research focuses on theoretical particle physics and cosmology, including dark matter direct detection, constraining new physics in astrophysics and cosmology, and cosmological phase transitions.
Video link (internal):
https://vshare.sjtu.edu.cn/play/eea7bde0-b8a3-4206-8a8a-6fb60c6ed4ae