On the Delta I = 1/2 Rule in Holographic QCD

Details On the Delta I = 1/2 Rule in Holographic QCD On the Delta I = 1/2 Rule in Holographic QCD

2005-12-07

arxiv.org/abs/hep-ph/0512089v2

Phys.Rev. D74 (2006) 026003

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 1 figure, numerical factor corrected, references added

Scientific paper

10.1103/PhysRevD.74.026003

We study the $\Delta I = 1/2$ rule for kaon decays and the $B_K$ parameter for $K^0 - {\bar K}^0$ 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.

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