Determination of alpha_s from scaling violations of truncated moments of structure functions

Abstract

We determine the strong coupling alpha_s(M_Z) from scaling violations of truncated moments of the nonsinglet deep inelastic structure function F_2. Truncated moments are determined from BCDMS and NMC data using a neural network parametrization which retains the full experimental information on errors and correlations. Our method minimizes all sources of theoretical uncertainty and bias which characterize extractions of alpha_s from scaling violations. We obtain alpha_s(M_Z) = 0.124 +0.004-0.007 (exp.) + 0.003- 0.004 (th.).

24 pages, 4 figures, latex with epsfig; neural network parametrization available from http://sophia.ecm.ub.es/f2neural

References in corpus (2)

• Neural Network Parametrization of Deep-Inelastic Structure Functions
• Solving the Altarelli-Parisi equations with truncated moments

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