Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-09-27
Nucl.Phys.Proc.Suppl.207-208:21-24,2010
Physics
High Energy Physics
High Energy Physics - Experiment
4 pages, 4 figures, contribution to the 15th international QCD conference (QCD 10), Montpellier, France (2010)
Scientific paper
10.1016/j.nuclphysbps.2010.10.00
The cross section of inclusive diffractive process ep -> eXp was measured within a wide kinematic range in the H1 and ZEUS experiments at HERA. Results obtained by different experiments and methods are compatible within measurement uncertainties. The measurements were subjected to DGLAP next-to-leading order QCD global fits and the diffractive parton distribution functions (DPDFs) of the proton were determined with noticeably reduced uncertainties due to very high precision of the data. The gluon density precision was much improved in fits which also included data on dijet production in diffractive DIS. Predictions based on the determined DPDFs are in agreement with the measured inclusive cross-section of diffractive dijet photoproduction and charm production in diffractive DIS at HERA. The longitudinal diffractive structure function $F^D_L$ was measured directly for the first time.
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