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} = 0.1183 +- 0.0028(stat)+- 0.0008(model). An additional uncertainty from the choice of scales is estimated as +- 0.005 . This is the first extraction of alpha_s(M_Z) from HERA data alone.

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

COSTA, Marco;FERRERO, Maria Italia;MONACO, Vincenzo;SACCHI, Roberto;SOLANO, Ada Maria;
2005-01-01

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-production data constrains the gluon and allows an accurate extraction of alpha_s(M_Z) at NLO; alpha _{s} = 0.1183 +- 0.0028(stat)+- 0.0008(model). An additional uncertainty from the choice of scales is estimated as +- 0.005 . This is the first extraction of alpha_s(M_Z) from HERA data alone.
2005
42
1
16
http://dx.doi.org/10.1140/epjc/s2005-02293-x
High Energy Physics; HERA; ZEUS Collaboration
Chekanov S ; Derrick M ; Magill S ; Miglioranzi S ; Musgrave B ; Repond J ; Yoshida R ; Mattingly MCK ; Pavel N ; Yagues AG ; Antoni...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1277
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