Center for Theoretical Physics of the Universe (CTPU)

# Understanding Heavy Quark-AntiQuark System by Perturbative QCD

## by Prof. Yukinari Sumino (Tohoku University)

Thursday, 19 May 2016 from to (Asia/Seoul)
 Description Due to the discovery of renormalon cancellation, it became possible to describe the nature of a heavy quark-antiquark system (such as bottomonium) based on perturbative QCD, both qualitatively and quantitatively. Accordingly, interpretaions of the heavy quark mass and interquark force have been modified considerably. I overview what has been understood and some of theoretical progress since then. The UV part of the interquark potential can be computed in perturbative QCD. We show that a "Coulomb+linear" potential is obtained as prediction.