Charm-quark contribution to KL-->mu+mu- at next-to-next-to-leading order.

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...

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Main Authors: Gorbahn, M, Haisch, U
格式: Journal article
语言:English
出版: 2006