AdS/QCD and Novel Phenomena in Hadron Physics

http://www.slac.stanford.edu/grp/th/Brodsky/BrodskyHome.html

One of the most interesting recent advances in hadron physics has been the application of Maldacena's AdS/CFT correspondence to quantum chromodynamics. One can use five-dimensional anti-de Sitter space to construct an analytic and relativistic first approximation to QCD. The resulting AdS/QCD model gives remarkably accurate redictions for hadron spectroscopy and a description of the quark structure of mesons and baryons which has scale invariance and dimensional counting at short distances, as well as quark confinement at large distances. In addition, one can compute the form of the frame-independent light-front bound-state wavefunctions, the fundamental nonperturbative entities which encode hadron properties and which allow the computation of hadronic scattering amplitudes. A number of novel applications of AdS/QCD and light-front wavefunctions to hadron physics phenomenology will also be discussed, such as color transparency, hidden color, intrinsic charm, sea-quark asymmetries, dijet diffraction, direct hard processes, and hadronic spin dynamics.