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- W2003360201 abstract "A method of improving perturbation theory in QCD is developed which can be applied to any polarization operator. The case of the polarization operator Π(q 2), corresponding to the process e + e −→ hadrons, is considered in detail. By the use of the analytical properties of Π(q 2) and a perturbation expansion of Π(q 2) for q 2<0, the function ImΠ(q 2) at q 2>0 is defined in such a way that the infrared pole is eliminated. The convergence of the perturbation series for R(q 2)=σ(e + e − →hadrons)/(e + e −→μ + μ −) is improved. After substitution of R(q 2) into the dispersion relation an improved Adler function D(q 2) is obtained, having no infrared pole and a frozen α s (q 2). Good agreement with experiment is achieved." @default.
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- W2003360201 title "Improvement of perturbation theory in QCD for e + e − →hadrons and the problem of α s freezing" @default.
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- W2003360201 doi "https://doi.org/10.1134/1.568146" @default.
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