Speaker
Hidenori Fukaya
(Osaka University)
Description
The chiral susceptibility, or the first derivative of the chiral condensate, is used as a probe for QCD phase transition. It is well-known that the chiral condensate is an order parameter of SU(2)_L x SU(2)_R symmetry breaking. However, the condensate also breaks the axial U(1) symmetry, which is usually not paid attention as it is already broken by anomaly. In this talk, we would like to show a surprising numerical result by JLQCD collaboration that the chiral susceptibility is dominated by the axial U(1) anomaly at high temperature. Namely, the chiral susceptibility is probing the temperature dependence of anomaly, rather than that of SU(2)_L x SU(2)_R.
Primary author
Hidenori Fukaya
(Osaka University)
