Final State Interactions in eps'/eps

Details Final State Interactions in eps'/eps Final State Interactions in eps'/eps

2000-07-13

arxiv.org/abs/hep-ph/0007137v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, 5 figures, La Thuile 2000 Proceedings, refs added

Scientific paper

I shortly review the present status of the theoretical estimates of eps'/eps. I consider a few aspects of the theoretical calculations which may be relevant in understanding the present experimental results. In particular, I discuss the role of final state interactions and in general of non-factorizable contributions for the explanation of the Delta I = 1/2 selection rule in kaon decays and eps'/eps. Lacking reliable lattice calculations, the 1/N expansion and phenomenological approaches may help in understanding correlations among theoretical effects and the experimental data. The same dynamics which underlies the CP conserving selection rule may drive eps'/eps in the range of the recent experimental measurements.

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