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.