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Theoretical Uncertainties in the QCD Evolution of Structure Functions and their Impact on $α_s(M_Z^2)$

J. Blümlein·S. Riemersma·W. L. van Neerven·A. Vogt
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Abstract

The differences are discussed between various next-to-leading order prescriptions for the QCD evolution of parton densities and structure functions. Their quantitative impact is understood to an accuracy of 0.02\%. The uncertainties due to the freedom to choose the renormalization and factorization scales are studied. The quantitative consequences of the different uncertainties on the extraction of the strong coupling constant $α_s$ from scaling violations in deep--inelastic scattering are estimated for the kinematic regime accessible at HERA.

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J. Blümlein, S. Riemersma, W. L. van Neerven, A. Vogt. 1996-09-02. Theoretical Uncertainties in the QCD Evolution of Structure Functions and their Impact on $α_s(M_Z^2)$. https://doi.org/10.1016/s0920-5632(96)90012-2

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