Inclusive Measurement of Diffractive Deep Inelastic Scattering at HERA

Sauvan, Emmanuel

doi:10.3204/DESY-PROC-2012-02/209

Contribution to a conference proceedings/Internal Report

DESY-2013-01022

Inclusive Measurement of Diffractive Deep Inelastic Scattering at HERA

Sauvan, E. (Corresponding author)Extern*

2012
Deutsches Elektronen-Synchrotron Hamburg
ISBN: 978-3-935702-67-6

Proceedings of the XXth International Workshop on Deep-Inelastic Scattering and Related Topics DIS 2012
20th International Workshop on Deep-Inelastic Scattering and Related Topics, DIS 2012, Bonn, Germany, 26 Mar 2013 - 30 Mar 2013 Hamburg : Deutsches Elektronen-Synchrotron : 1st Ed., 459-462 (2012) [10.3204/DESY-PROC-2012-02/209]

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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2012-02/209

Report No.: DESY-PROC-2012-02

Abstract: The diffractive process $ep\rightarrow eXY$, where Y denotes a proton or its low mass excitation having My < 1.6 GeV, is studied with the H1 experiment at HERA. Triple differential cross sections are measured as a function of the photon virtuality $\it Q^{2}$, the longitudinal momentum fraction of the incident proton carried by the colourless exchange xIP and $\beta$ = x/xIP , where $\it x$ is the Bjorken scaling variable. These measurements are made after selecting diffractive events by demanding a large empty rapidity interval separating the final state hadronic systems X and Y. High statistics measurements covering the data taking periods 1999-2000 and 2004-2007 are combined with previously published results. The combined data represent a factor between three and thirty increase in statistics with respect to the previously published results. The measurements are compared with predictions from NLO QCD calculations based on diffractive parton densities and from a dipole model. The proton vertex factorisation hypothesis is tested.

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