The Delta I = 1/2 Rule and epsilon'/epsilon in the Chiral Quark Model

Details The Delta I = 1/2 Rule and epsilon'/epsilon in the Chiral Quark Model The Delta I = 1/2 Rule and epsilon'/epsilon in the Chiral Quark Model

2000-01-24

arxiv.org/abs/hep-ph/0001235v1

Frascati Phys.Ser. 16 (1999) 205-214

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages. Proceedings of the Dafne99 Workshop, Nov. 16-19, 1999

Scientific paper

I discuss the role of the Delta I = 1/2 selection rule in K -> pi pi decays for the theoretical calculations of eps'/eps. Lacking reliable ``first principle'' calculations, phenomenological approaches may help in understanding correlations among different contributions and available experimental data. In particular, in the chiral quark model approach the same dynamics which underlies the Delta I = 1/2 selection rule in kaon decays appears to enhance the K -> pi pi matrix elements of the gluonic penguins, thus driving eps'/eps in the range of the recent experimental measurements.

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