Abstract:
We investigate the dynamics of bound qˉq\bar qq systems in a covariant quasi-potential framework. In the spirit of the heavy baryon effective theory we restrict heavy quarks as spectators on their mass shell and evaluate multigluon exchange contributions up to αS3\alpha^3_S. We suggest a systematic extension of the spectator picture to massless particles (light quarks and gluons) and discuss the connection between the instant and the front form in the limit of heavy quarks.
  • talk: Cracow 1996/05/10
  • heavy quark
  • quark antiquark: bound state
  • model: quasipotential
  • Bethe-Salpeter equation
  • exchange: multigluon
  • multigluon: exchange
  • model: spectator
  • particle: massless
  • massless: particle
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