Color-octet heavy-quark potential from the instanton vacuum

초록

In this talk, we show the color-octet heavy quark and antiquark potential in the instanton vacuum. We show that the color-octet Wilson loop is represented by inserting the SU(3) generators on the spatial Wilson lines. We obtain the non-perturbative color-octet potential, which is equal to color-singlet potential. However, the perturbative one-gluon exchange instanton effect gives ?1/(Nc 2? 1) times the difference between the color-singlet. We conclude that the non-perturbative instanton effect is not affected by color-states, while the perturbative instanton does.