Value of α_s and high twists from combined analysis e-μ DIS data

1999/10/26 by Alekhin Sergey, Sergey, Alekhin
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/9910490

Talk given on XI-th Recontres de Blois, ``Frontiers of Matter'', June 28-July 3, 1999, 3 pages, LATEX, 1 figure (EPS)

arxiv created 1999/10/26 · arxiv updated 2009/11/30

Abstract

We perform a NLO QCD analysis of the combined SLAC-BCDMS-NMC-E665-H1-ZEUS data on inclusive deep inelastic cross section. Particular attention was paid to the extraction of strong coupling constant α_s and high twist (HT) contribution to the structure functions F₂ and F_L. It was shown that at small and moderate x there is a visible dependence of the extracted values of HT contribution to F₂ on the QCD renormalization scale, which indicates that in this region extracted HT can absorb NNLO QCD corrections. At larger x the dependence of HT on the renormalization scale is negligible and the influence of NNLO correction on their values should be less significant. The value of α_s(M_Z)=0.1159±0.0031 (total) is obtained, where the error includes statistical, systematical and theoretical uncertainties.

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