Theoretical strategies for epsilon ′ / epsilon
نویسنده
چکیده
We review the current status of calculations of the two pion decays of the kaon using the firstprinciples methods of lattice gauge theory and the significant challenges that these calculations pose. While a calculation with controlled errors at even the 10-20% level has not yet been performed, present results suggest that such a calculation of the real and imaginary parts of the ∆I = 3/2 amplitude should be accomplished within the next two years. The more difficult ∆I = 1/2 amplitude may also be now within reach.
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