DeltaI=1/2 rule in holographic QCD

THOMAS HAMBYE, BABIKER HASSANAIN, JOHN MARCH-RUSSELL, MARTIN SCHVELLINGER

PHYSICAL REVIEW D - PARTICLE AND FILDS

APS - American Physical Society

Lugar: New York - USA; Año: 2006 vol. 74 p. 260031 - 260035

0556-2821

We study the DeltaI=1/2 rule for kaon decays and the BK parameter for K0-[overline 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 (chiSB) is realized through boundary conditions on the bulk fields. Numerical results are analyzed in comparison with QCD, chiral perturbation theory (chiPT) and data, finding reasonable agreement with the experimental values of the g8 and g27 parameters describing the DeltaI=1/2, 3/2 decay channels.