Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-01-23
AIP Conf.Proc. 618 (2002) 79-88
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, Invited talk at the 9th Int. Symposium on Heavy Flavour Physics, Pasadena, CA, 10-13 September 2001 Comments added o
Scientific paper
10.1063/1.1478825
I shortly review the present status of the theoretical calculations of epsilon'/epsilon and the comparison with 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 and direct CP violation in kaon decays. Still lacking reliable lattice calculations, analytic methods and phenomenological approaches are helpful in understanding correlations among theoretical effects and the experimental data. Substantial progress from lattice QCD is expected in the coming years.
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