Charm-Quark Contribution to K_L -> mu^+ mu^- at Next-to-Next-to-Leading
We calculate the charm-quark contribution to the decay K_L -> mu^+ mu^- in next-to-next-to-leading order of QCD. This new contribution reduces the theoretical uncertainty in the relevant parameter P_c from +/-22% down to +/-7%, corresponding to scale uncertainties of +/-3% and +/-6% in the sh...
| Main Authors: | , |
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| Format: | Journal article |
| Published: |
2006
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