XQCD 2019 (The 17th International Conference on QCD in Extreme Conditions)

Nonrelativistic Nambu-Goldstone modes of generalized global symmetries and new dynamic critical phenomena in QCD

24 Jun 2019, 17:00

2h

122 (Bunkyo School Building, Tokyo Campus, University of Tsukuba)

Board: 27

Poster Poster session

Speaker

Mr Noriyuki Sogabe (Keio University)

Description

We study the effects of dynamical electromagnetic fields on the second-order chiral phase transition of QCD under a background magnetic field. We show that the interaction between the photon and the neutral pion through the quantum anomaly causes the type-B Nambu Goldstone (NG) mode associated with the spontaneous breaking of the generalized global symmetries. Furthermore, we find that such a novel NG mode leads to the new dynamic universality class beyond the conventional Hohenberg and Halperin's classification. We also argue a possible realization of this new dynamic universality class in 3-dimensional Dirac semimetals.