题 目： QCD-Collapsed Domain Walls
报告人： Yang Bai
时 间： 2023年7月17号（星期一）上午10:00
地 点： 0638太阳集团LE201
邀请人： 吴兴刚
报告摘要：For a discrete symmetry that is anomalous under QCD, the domain walls produced in the early universe from its spontaneous breaking can naturally annihilate due to QCD instanton effects. We point out that the QCD phase transition within some domains with an effective large QCD theta angle could be a first-order one. This class of domain-wall models predicts an interesting gravitational wave spectroscopy with frequencies spanning more than ten orders of magnitude, from nanohertz to 100 Hz.
报告人介绍:
Prof. Yang Bai is a Professor in the Department of Physics at the University of Wisconsin-Madison. He obtained his B.S. from the USTC in 2002 and his Ph.D. from Yale University in 2007. He conducted postdoctoral studies at Fermilab from 2007 to 2010 and at SLAC from 2010 to 2012 before joining the University of Wisconsin-Madison. Prof. Bai’s research interests lie in theoretical particle physics, specifically focusing on areas such as dark matter, collider physics, black hole, and the early universe physics.
