Abstract

The speaker will talk on his recent works related to discrete symmetries. The Peccei-Quinn symmetry is always approximate whose breaking however is huge due to the QCD anomaly. The dark energy U(1)-global symmetry can be approximated but without the QCD anomaly, which makes it very feeble. It can be small if the discrete symmetry is of high order. He will also give a prospect of the QCD axion detection.

The seminar is free and open to all. Seating is on a first-come, first-served basis.

HKUST Jockey Club Institute for Advanced Study
Enquiries: ias@ust.hk / 2358 5912
http://ias.ust.hk