A study of QCD coupling constant from fixed target deep inelastic measurements
Abstract
We reanalyze deep inelastic scattering data of BCDMS Collaboration by including proper cuts of ranges with large systematic errors. We perform also the fits of high statistic deep inelastic scattering data of BCDMS, SLAC, NM and BFP Collaborations taking the data separately and in combined way and find good agreement between these analyses. We extract the values of the QCD coupling constant \alpha_s(M^2_Z) up to NLO level. The fits of the combined data for the nonsinglet part of the structure function F_2 predict the coupling constant value \alpha_s(M^2_Z) = 0.1174 \pm 0.0007 (stat) \pm 0.0019 (syst) \pm 0.0010 (normalization). The fits of the combined data for both: the nonsinglet part of F_2 and the singlet one, lead to the values \alpha_s(M^2_Z) = 0.1177 \pm 0.0007 (stat) \pm 0.0021 (syst) \pm 0.0009 (normalization). Both above values are in very good agreement with each other.
 Publication:

arXiv eprints
 Pub Date:
 June 2002
 DOI:
 10.48550/arXiv.hepph/0206221
 arXiv:
 arXiv:hepph/0206221
 Bibcode:
 2002hep.ph....6221K
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 8 pages, 2 figures, latex. Talk presented at the XVIth International Workshop "High Energy Physics and Quantum Field Theory", Moscow, September 2001