Abstract
CLEO-c measurements of the timelike form factors F π , F K at \(\sqrt{s}=3.671\) GeV provide a direct probe of power corrections (PC’s) at energies near m B . PC’s in F π,K and B→Kπ,ππ are separated into perturbative and soft parts. In F π,K the latter are ≥O(10) larger. A PC fit to the B→Kπ,ππ data also yields a ≥O(10) soft-to-perturbative hierarchy for the QCD penguin PC’s. Hence, both can be attributed to dominance of the soft-overlap between energetic (approximately) back-to-back collinear partons, and consistency of the B→Kπ,ππ fit with the Standard Model appears to be naturally realized. The CP asymmetries \(S_{K_{s} \pi^{0}}\), \(C_{K_{s} \pi^{0}}\) are well determined, providing a clean test for new physics.
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Duraisamy, M., Kagan, A.L. Power corrections in e + e −→π + π −,K + K − and B→Kπ,ππ . Eur. Phys. J. C 70, 921–925 (2010). https://doi.org/10.1140/epjc/s10052-010-1496-y
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DOI: https://doi.org/10.1140/epjc/s10052-010-1496-y