A Weak-Coupling Treatment of Nonperturbative QCD Dynamics to Heavy Hadrons

Abstract

Based on the recently developed light-front similarity renormalization group approach and the light-front heavy quark effective theory, we derive analytically from first-principles QCD a heavy quark light-front Hamiltonian which contains explicitly a confinement interaction at long distances and a Coulomb-type interaction at short distances. With this light-front QCD Hamiltonian, we further demonstrate that the nonperturbative QCD dynamics of the strongly interacting heavy hadron bound states can be treated as a weak-coupling problem.

35 pages, Revtex, 3 figs. (A shortened and impoved version of hep-ph/9510428 that will be published in Phys. Rev. D)