Seminar - Understanding Heavy Quark-AntiQuark System by Perturbative QCD

Friday March 8th 2013, 2:30pm -  Seminar room

Speaker: Yukinari Sumino (Tohoku U)

Around 1998, 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, interpretations of the heavy quark mass and interquark force have been modified considerably. I overview what has been understood and theoretical progress since then. For instance, the renormalon dominance picture has been confirmed to be valid and predicts a Coulomb+linear shape of the interquark potential. I also review briefly applications such as high precision determinations of the b,c,t quark masses and alpha_s.


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