P11: Dark Matter and Dark Sectors (暗物質和暗域)

Modern cosmology and astrophysics reveal that 85% of the matter in the universe is comprised of dark matter, which seemingly interacts with ordinary matter only through gravitational forces. Despite compelling evidence for its existence, the properties of dark matter remain largely unknown. Considering that ordinary matter consists of a variety of particles engaging in complex interactions, it is natural to hypothesise that dark matter is not "alone". It could be part of the "dark sectors", a collection of hidden particles such as dark photons and dark Higgs bosons. These dark sector particles could mediate the feeble interactions between dark matter and ordinary matter, mediate self-interactions within dark matter, or even be dark matter themselves. I will explore theories related to dark matter and dark sectors, as well as the ongoing searches for them through terrestrial experiments and astrophysical observations.


Speaker: Prof. Yiming ZHONG
Target Audience: Form 4 - 6
Duration: 1 hour
Medium of Language: English or Mandarin

Registration: https://www.cityu.edu.hk/csci/local-school-outreach/popular-science-talks