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Holography, chiral Lagrangian and form factor relations

2012; Springer Nature; Volume: 2012; Issue: 11 Linguagem: Inglês

10.1007/jhep11(2012)012

1127-2236

Pietro Colangelo, Juan José Sanz-Cillero, Fen Zuo,

Black Holes and Theoretical Physics

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. Some of the relations between low-energy constants are the manifestation, at large distances, of universal relations that we find between form factors in the even and odd sectors, e.g., between the gamma*->pi pi and pi->gamma gamma* matrix elements.