Rare K -> pi nu nubar Decays
Ulrich Haisch
Abstract
We present a concise review of the theoretical status of rare K -> pi nu nubar decays in the standard model (SM). Particular attention is thereby devoted to the recent calculation of the next-to-next-to-leading order (NNLO) corrections to the charm quark contribution of K+ -> pi+ nu nubar, which removes the last relevant theoretical uncertainty from the K -> pi nu nubar system.
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