The Role of Final State Interactions in Ε/ε

نویسنده

ELISABETTA PALLANTE

چکیده

The CP–violating ratio ε/ε constitutes a fundamental test for our understanding of flavour–changing phenomena. The present experimental world average,1 Re (ε/ε) = (19.3 ± 2.4) · 10, provides clear evidence for a non-zero value and, therefore, the existence of direct CP violation. The theoretical prediction has been rather controversial since different groups, using different models or approximations, have obtained different results.2,3,4,5,6,7,8,9 In terms of the K → ππ isospin amplitudes, AI = AI eI (I = 0, 2),

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