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IHEP 2000 - 39
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| S.I.Alekhin | ||
| Global Fit to the Charged Leptons DIS Data: alphas, Parton Distributions, and High Twists | ||
| Protvino, 2000.-p.19, figs.9, tables 1, refs.:22. | ||
We perform the NLO QCD analysis of the world data on inclusive deep inelastic scattering cross sections of charged leptons off proton-deuteron targets. The parton distributions, the value of strong coupling constant $\alpha_{\rm s}$, and the twist 4 contributions to the structure functions $F_2$ and $F_{\rm L}$ are extracted with a complete account for the correlations of data points due to systematic errors. Sensitivity of the $\alpha_{\rm s}$ value and the high twist contribution to the procedures of accounting for the systematic errors is studied. The influence of several sources of theoretical uncertainties on the value of $\alpha_{\rm s}$ and on the parton distributions is analysed. The obtained value of strong coupling constant with account for these uncertainties is $\alpha_{\rm s}(M_{\rm Z})=0.1165\pm0.0017~({\rm stat+syst}) \pm^{0.0026}_{0.0034}({\rm theor})$. The uncertainties of parton-parton luminosities for the FNAL and LHC colliders are estimated.
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