Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 42, Issue 1, Pages 1-16Publisher
SPRINGER
DOI: 10.1140/epjc/s2005-02293-x
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The ZEUS inclusive differential cross-section data from HERA, for charged and neutral current processes taken with e(+) and e(-) beams, together with differential cross-section data on inclusive jet production in e+ p scattering and dijet production in gamma p scattering, have been used in a new NLO QCD analysis to extract the parton distribution functions of the proton. The input of jet-production data constrains the gluon and allows an accurate extraction of alpha(s)( M-Z) at NLO; alpha(s)( M-Z) = 0.1183 +/- 0.0028( exp.) +/- 0.0008( model). An additional uncertainty from the choice of scales is estimated as +/- 0.005. This is the first extraction of as( M-Z) from HERA data alone.
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