An NLO QCD analysis of inclusive cross-section and jet-production data from the ZEUS experiment

Preprint

29 March 2005

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/0503274

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 \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 data constrains the gluon and allows an accurate extraction of \alpha_s(M_Z) at NLO; \alpha_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 \alpha_s(M_Z) from HERA data alone.

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Version 1, 2005-03-29, ArXiv
Published version: The European Physical Journal C, 42 (1), 1.

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