Article

Measurement of the inclusive ep scattering cross section at low Q2 and x at HERA

B. Olivier
B. Olivier
Inter-University Institute for High Energies ULB-VUB Brussels Belgium; Universiteit Antwerpen Antwerpen Belgium
European Physical Journal C (Impact Factor: 5.25). 01/2009; 63(4):625-678. DOI: 10.1140/epjc/s10052-009-1128-6

ABSTRACT A measurement of the inclusive ep scattering cross section is presented in the region of low momentum transfers, 0.2 GeV2 ≤Q2≤12 GeV2, and low Bjorken x, 5⋅10−6≤x≤0.02. The result is based on two data sets collected in dedicated runs by the H1 Collaboration at HERA at beam energies of
27.6 GeV and 920 GeV for positrons and protons, respectively. A combination with data previously published by H1 leads to
a cross section measurement of a few percent accuracy. A kinematic reconstruction method exploiting radiative ep events extends the measurement to lower Q
2 and larger x. The data are compared with theoretical models which apply to the transition region from photoproduction to deep inelastic
scattering.

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    ABSTRACT: Self-similar properties of proton structure in the kinematic region of low values of the Bjorken variable x are introduced and studied numerically. A description of the proton structure function reflecting self-similarity is proposed with a few parameters which are fitted to recent HERA data. The specific parametrisation provides an excellent description of the data which cover the region of four momentum transfer squared , and of the Bjorken variable .
    European Physical Journal C 07/2002; 24(4):529-533. · 5.25 Impact Factor

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Jun 5, 2014