Measurement of the diffractive structure function in deep inelastic scattering at HERA
electron p: deep inelastic scattering
structure function: pomeron
structure functions; diffractive scattering; pomeron
diffraction
momentum dependence
FOS: Physical sciences
296 GeV-cms
01 natural sciences
High Energy Physics - Experiment
LUND MONTE-CARLO; CENTRAL TRACKING DETECTOR; POMERON STRUCTURE; JET FRAGMENTATION; E+E-PHYSICS; ZEUS; VERSION; DISSOCIATION; CALORIMETER; SINGULARITY
sum rule: momentum
High Energy Physics - Experiment (hep-ex)
deep inelastic scattering: electron p
structure function: parametrization
0103 physical sciences
info:eu-repo/classification/ddc/530
pomeron: exchange
scaling
ZEUS
rapidity: gap
colliding beams: electron p
DESY HERA Stor
electron p: colliding beams
exchange: pomeron
dependence: momentum transfer
experimental results
DOI:
10.1007/bf01565257
Publication Date:
2005-04-27T16:46:15Z
AUTHORS (455)
ABSTRACT
36 pages, latex, 11 figures appended as uuencoded file<br/>This paper presents an analysis of the inclusive properties of diffractive deep inelastic scattering events produced in $ep$ interactions at HERA. The events are characterised by a rapidity gap between the outgoing proton system and the remaining hadronic system. Inclusive distributions are presented and compared with Monte Carlo models for diffractive processes. The data are consistent with models where the pomeron structure function has a hard and a soft contribution. The diffractive structure function is measured as a function of $\xpom$, the momentum fraction lost by the proton, of $��$, the momentum fraction of the struck quark with respect to $\xpom$, and of $Q^2$. The $\xpom$ dependence is consistent with the form \xpoma where $a~=~1.30~\pm~0.08~(stat)~^{+~0.08}_{-~0.14}~(sys)$ in all bins of $��$ and $Q^2$. In the measured $Q^2$ range, the diffractive structure function approximately scales with $Q^2$ at fixed $��$. In an Ingelman-Schlein type model, where commonly used pomeron flux factor normalisations are assumed, it is found that the quarks within the pomeron do not saturate the momentum sum rule.<br/>
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