Authors: Pietro Colangelo Juan Jose SanzCillero Fen Zuo
Publish Date: 2013/06/06
Volume: 2013, Issue: 6, Pages: 20-
Abstract
Using holographic models where chiral symmetry is broken through IR bc’s we determine a novel set of relations between QCD matrix elements In particular we find that the amplitudes of the three processes ππ → ππ γγ → ππ and γ → πππ involve a single scalar function hQ 2 given by a suitable 5D integral of the EoM Green’s function In a phenomenological analysis of γγ → ππ we find an overall agreement with the experimental cross section for a broad range of energy Moreover the polarizabilities at low energies show a fair agreement between the holographic approach previous computations and experiment
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