Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-01-19
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages, Invited talk at the RADCOR 2000 Symposium, Carmel CA, USA, 11-15 Sept 2000
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. I discuss the role of higher order chiral corrections 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 appears to drive eps'/eps in the range of the recent experimental measurements.
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