Paper
An NLO QCD analysis of inclusive cross-section and jet-production data from the ZEUS experiment
Authors
ZEUS Collaboration
Abstract
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 γp scattering, have been used in a new NLO QCD analysis to extract the parton distribution functions of the proton. The input of jet data constrains the gluon and allows an accurate extraction of α_s(M_Z) at NLO;
α_s(M_Z) = 0.1183 \pm 0.0028(exp.) \pm 0.0008(model)
An additional uncertainty from the choice of scales is estimated as \pm 0.005. This is the first extraction of α_s(M_Z) from HERA data alone.