ΔI=1/2 rule in holographic QCD

We study the Delta I=1/2 rule for kaon decays and the B-K parameter for K-0-(K) over bar (0) mixing in a dual 5-dimensional holographic QCD model. We perform, in the chiral limit, computations of the relevant four-point current-current correlators, which depend upon self-interactions among the 5D bulk fields. Spontaneous chiral symmetry breaking (chi SB) is realized through boundary conditions on the bulk fields. Numerical results are analyzed in comparison with QCD, chiral perturbation theory (chi PT) and data, finding reasonable agreement with the experimental values of the g(8) and g(27) parameters describing the Delta I=1/2, 3/2 decay channels.