Hadron Spectroscopy and Dynamics from Light-Front Holography and   Conformal Symmetry
  To a first semiclassical approximation one can reduce the multi-parton light-front problem in QCD to an effective one-dimensional quantum field theory, which encodes the fundamental conformal symmetry of the classical QCD Lagrangian. This procedure leads to a relativistic light-front wave equation for arbitrary spin which incorporates essential spectroscopic and non-perturbative dynamical features of hadron physics. The mass scale for confinement and higher dimensional holographic mapping to AdS space are also emergent properties of this framework. 
Guy F. de Teramond, Stanley J. Brodsky, Hans G\"unter Dosch
hep-ph