摘要
Using the Schwinger Dyson equation and perturbation theory,we calculate the two-quark condensates forthe light quarks u,d,strange quark s and a heavy quark c with their current masses respectively.The results show thatthe two-quark condensate will decrease when the quark mass increases,which hints the chiral symmetry may be restoredfor the heavy quarks.
基金
Supported in part by the Key Research Plan of Theoretical Physics and Cross Science of China under Grant No.90503011
National Natural Science Foundation under Grant No.10775012
