Departmental Colloquium: Dr. Ho-Ung Yee
Title: “Triangle anomaly in quark-gluon plasma and heavy-ion collisions”
Abstract: Triangle anomaly is a quantum-mechanical violation of axial symmetry in P- and CP-odd environments, which is an important aspect of QCD (Quantum Chromo Dynamics) that governs strong interactions of
matter. Quark-gluon plasma created in heavy-ion collisions at RHIC and LHC is an intriguing new state of matter with strong interactions, and provides interesting opportunities of testing fundamental nature of QCD such as triangle anomaly. We will discuss several newly discovered phenomena originating from triangle anomaly in quark-gluon plasma: chiral magnetic effect, chiral magnetic wave, and 2nd order hydrodynamics with triangle anomaly, etc. We also present their possible experimental implications including charge-dependent elliptic flows of hadrons, and flows/polarization asymmetry of early direct photons.