Journal
INTERNATIONAL JOURNAL OF MODERN PHYSICS A
Volume 24, Issue 6, Pages 1069-1086Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217751X0904333X
Keywords
Structure functions; DIS; PDF; spin
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Recent progress in the understanding of the nucleon is presented. The unpolarized structure functions are obtained with unprecedented precision from the combined H1 and ZEUS data and are used to extract proton parton distribution functions via NLO QCD fits. The obtained parametrization displays an improved precision, in particular at low Bjorken x, and leads to precise predictions of cross-sections for LHC phenomena. Recent data from proton-antiproton collisions at Tevatron indicate further precise constraints at large Bjorken x. The flavor content of the proton is further studied using final states with charm and beauty in DIS ep and pp collisions. Data from polarized DIS or proton-proton collisions are used to test the spin structure of the proton and to constrain the polarized parton distributions.
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