MLL-Kolloquium: Dr. Sungmin Hwang (Physik Department T30f, TUM): Long-distance heavy-quark potentials in the effective string theory

Thursday 22 Dec 2016, 16:00 → 17:00 Europe/Berlin

Lecture Hall (ground floor west) (LMU building, Am Coulombwall 1, Garching)

We use nonlinear transformations for non-relativistic fields to implement Poincare symmetry in Non-Relativistic QCD (NRQCD) and potential Non-Relativistic QCD (pNRQCD), and show how the Poincare algebra is satisfied for these transformations, which thereby gives complementary information on the Wilson coefficients. Upon the established constraints on the Wilson coefficients, which are potential-terms especially in pNRQCD, we explore their analytic behaviors at large separations between the static heavy quark and heavy antiquark, using the framework of the effective string theory (EST). Finally, we discuss how the (dimensionful) parameters that arise from the EST can be reduced/simplified by the realization of Poincare symmetry in QCD.

Abstract kolloquium-22-12-16.pdf