Color-octet heavy quark potential from the instanton vacuum

초록

In the present talk, we investigate the color-octet heavy-quark potential from the instanton vacuum. We discuss the instanton effects on the masses and hyperfine mass splittings of the color-octet heavy quarkonium systems. In addition, we deal with the polarization of the quarkonia, which can be used to describe the heavy pentaquarks, Pc's.