Holographic Modelling of a Light Techni-Dilaton

Understand

We present a simplified holographic model of chiral symmetry breaking in gauge theory.

• The chiral condensate is represented by a single scalar field in AdS, with the gauge dynamics input through radial dependence of its mass, representing the running of the anomalous dimension of the qbar q operator.
• We discuss simple examples of the chiral transition out of the conformal window when the infrared value of the anomalous dimension, \gamma_m, is tuned to one (equivalently the AdS-scalar mass squared is tuned to the Breitenlohner-Freedman bound of -4).
• The output of the model are the masses of the $\bar{q} q$ scalar meson bound states.