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The four-loop beta-function in Quantum Chromodynamics
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We present the analytical calculation of the four-loop QCD beta-function within the minimal subtraction scheme.
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Cited by 4 Pith papers
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Combined fits of KEDR and BESIII R(s) data yield alpha_s(M_Z) = 0.1179, 0.1221, and 0.1312 at NLO, NNLO, and NNNLO, demonstrating strong dependence on perturbative truncation order.
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