Epsilon'/Epsilon in the Standard Model: Theoretical Update

Details Epsilon'/Epsilon in the Standard Model: Theoretical Update Epsilon'/Epsilon in the Standard Model: Theoretical Update

2004-10-14

arxiv.org/abs/hep-ph/0410215v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages. Proceedings ICHEP'04, Beijing, China, 16-22 August 2004

Scientific paper

A complete analysis of isospin breaking in K to 2 pion amplitudes, including both strong and electromagnetic corrections at next-to-leading order in chiral perturbation theory, has been achieved recently.We discuss the implication of these effects, together with the previously known chiral loop corrections, on the direct CP-violating ratio epsilon'/epsilon. One finds Re(epsilon'/epsilon) = (19^{+11}_{-9}) 10^{-4}.

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