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The CP-violating asymmetry in K_L -> pi+ pi- e+ e-

We update the theoretical analysis of the CP-violating asymmetry in the decay K_L -> pi+ pi- e+ e-, relying on chiral perturbation theory and on the most recent phenomenological information. With the experimentally determined magnetic amplitude and branching ratio as input, the asymmetry can be calculated with good accuracy. The theoretical interpretation of the sign of the asymmetry is discussed.

preprint2001arXivOpen access
G. EckerH. Pichl
hep-ph
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Open access2 authors1 topic
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G. EckerH. Pichl

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