Pion in the Holographic Model with 5D Yang-Mills Fields

Understand

We study pion in the holographic model of Hirn and Sanz which contains two Yang-Mills fields defined in the background of the sliced AdS space.

• The infrared boundary conditions imposed on these fields generate the spontaneous breaking of the chiral symmetry down to its vector subgroup.
• Within the framework of this model, we get an analytic expression for the pion form factor and a compact result for its radius.
• We also extend the holographic model to include Chern-Simons term which is required to reproduce the appropriate axial anomaly of QCD.