On the value of $α_s$ from the analysis of the SLAC/BCDMS deep inelastic scattering data

Details On the value of $α_s$ from the analysis of the SLAC/BCDMS deep inelastic scattering data On the value of $α_s$ from the analysis of the SLAC/BCDMS deep inelastic scattering data

1998-09-25

arxiv.org/abs/hep-ph/9809544v3

Phys.Rev.D59:114016,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, LATEX, 2 figures (PS), report-no added, English improved, misprints corrected, minor changes of the text

Scientific paper

10.1103/PhysRevD.59.114016

We performed NLO QCD analysis of the nonsinglet part of the combined SLAC/BCDMS data on $F_2$ with the extraction of $\alpha_s$ and high twist contribution. It was shown that the value of $\alpha_s$ obtained in the analysis is sensitive to the statistical inference procedures dealing with systematic errors on the data. The fit with the complete account of point-to-point correlations of the data gave the value of $\alpha_s(M_Z)=0.1180\pm0.0017 (68% C.L.)$, to be compared with the previously reported value of $\alpha_s(M_Z)=0.113\pm0.003 (99% C.L.)$. This new value of $\alpha_s$ is compatible with the LEP measurements and the world average. The high twist contribution being strongly anti-correlated with the value of $\alpha_s$ became lower than it was previously reported.

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