Power corrections in e + e −→π + π −,K + K − and B→Kπ,ππ
Department of Physics, University of Cincinnati, Cincinnati, OH, 45221, USA
2 Department of Physics and Astronomy, University of Mississippi, University, MS, 38677, USA
Published online: 20 November 2010
CLEO-c measurements of the timelike form factors F π , F K at 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 , are well determined, providing a clean test for new physics.
© Springer-Verlag / Società Italiana di Fisica, 2010