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| Home > Publications database > Combination of the H1 and ZEUS inclusive cross-section measurements at proton beam energies of 460 and 575 GeV and tests of Low Bjorken-$x$ phenomenological models |
| Dissertation / PhD Thesis/Internal Report | DESY-2013-00726 |
2013
Hamburg
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Please use a persistent id in citations: doi:10.3204/DESY-THESIS-2013-017
Report No.: DESY-THESIS-2013-017
Abstract: A combination is presented of the inclusive neutral current ep scattering cross section data collected by the H1 and ZEUS collaborations during the last months of the HERA II operationperiod with proton beam energies $\it E_{p}$ of 460 and 575 GeV. The kinematic range of the cross sectiondata covers low absolute four-momentum transfers squared, 1.5 $GeV^{2}$ $\le$ $Q{^2}$ $\le$ 110 $GeV{^2}$,small values of Bjorken-x, 2.8.$10^-5$ $\le$ x $\le$ 1.5.$10^-2}$, and high inelasticity $\it y$ $\le$ 0.85. The combinationalgorithm is based on the method of least squares and takes into account correlations ofthe systematic uncertainties. The combined data are used in the QCD fits to extract the partondistribution functions. The phenomenological low-x dipole models are tested and parameters ofthe models are obtained. A good description of the data by the dipole model taking into accountthe evolution of the gluon distribution is observed. The longitudinal structure function FL is extractedfrom the combination of the currently used H1 and ZEUS reduced proton beam energydata with previously published H1 nominal proton beam energy data of 920 GeV. A precisionof the obtained values of $F_{L}$ is improved at medium $\it Q^{2}$ compared to the published results of theH1 collaboration.
Keyword(s): Dissertation
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