报告题目：Searching for Dark Matter with Precision Low-Energy Experiments

报  告  人：Yevgeny V. Stadnik (The University of Sydney)

报告时间：2024年11月7日13:30

报告地点：物理楼（新）W105

内容摘要：Ultra-low-mass bosonic particles produced non-thermally in the early Universe may form a coherently oscillating classical field that can comprise the observed cold dark matter.  The very high number density of such particles can give rise to characteristic wave-like signatures that are distinct from the particle-like signatures considered in more traditional searches for WIMP dark matter.  In particular, ultra-low-mass scalar dark matter may induce apparent variations of the fundamental “constants” of Nature, while ultra-low-mass pseudoscalar (axionlike) dark matter may induce time-varying spin-precession effects (including oscillating electric dipole moments).  I discuss the basic principles of and recent results in searches for ultra-low-mass dark matter using a variety of precision low-energy experiments, including atomic spectroscopy, optical cavities and interferometers, torsion pendula, magnetometry, neutron experiments and g-factor measurements.

报告人简介： Yevgeny Stadnik received his PhD in 2017 from the University of New South Wales. After that he became a postdoctoral researcher at Johannes Gutenberg University of Mainz and became a Humboldt Research Fellow in 2017. He joined Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, first as a Kavli Fellow in 2019, then as an Assistant Professor in 2020. He became an ARC DECRA Research Fellow at School of Physics, The University of Sydney in 2022. Yevgeny Stadnik works on theoretical and experimental aspects of searching for new physics beyond the standard model, including dark matter, varying fundamental constants and tests of the fundamental symmetries.