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Optimal renormalization-group improvement of the perturbative series for thee+e−annihilation cross section
(American Physical Society (APS), 2003-02-26)
Using renormalization-group methods, we derive differential equations for the all-orders summation of logarithmic corrections to the QCD series for R(s)=sigma(e(+)e(-)-->hadrons)/sigma(e(+)e(-)-->mu(+)mu(-)), as ...