A QCD analysis of ZEUS data including DIS inclusive cross sections with longitudinally polarised leptons and data run at lower proton beam energies

摘要

New ZEUS data are added into the NLO QCD analysis of the ZEUS-JETS PDF fit.The addition of high-$Q^2$ NC and CC $e^-p$ inclusive cross-section dataimproves the determination of the $u$-valence quark at high $x$. The additionof high-$Q^2$ CC $e^+p$ inclusive cross-section data improves the determinationof the $d$-valence quark at high $x$. The addition of lower-$Q^2$ NC $e^+p$inclusive cross-section data, run at three different proton beam energies,improves the determination of the sea and gluon PDFs at small $x$. The new PDFfit is called the ZEUS09 PDF fit.