Holography, chiral Lagrangian and form factor relations

Understand

We derive all the O(p^6) Chiral Perturbation Theory low-energy constants from a class of gravity dual models of QCD described by the Yang-Mills and Chern-Simons Lagrangian terms, with the chiral symmetry broken through boundary conditions in the infrared.

• All the constants of the odd intrinsic parity sector are universally determined by those at O(p^4) in the even sector, together with an extra resonance term.
• A few relations for the even sector couplings are also extracted.
• Our estimates reasonably agree with the few available O(p^6) determinations from alternative phenomenological analyses.