10.3204/DESY-PROC-2012-02/209
Sauvan, Emmanuel
Emmanuel
Sauvan
Inclusive Measurement of Diffractive Deep Inelastic Scattering at HERA.
Deutsches Elektronen-Synchrotron, DESY, Hamburg
2013
ConferencePaper
Physics
2013
en
Abstract
Proc. of DIS 2012, 459-462; DESY
The diffractive process $ep \rightarrow eXY$, where $Y$ denotes a
proton or its low mass excitation having $M_Y < 1.6$~GeV, is studied
with the H1 experiment at HERA. Triple differential cross sections
are measured as a function of the photon virtuality $Q^2$, the longitudinal
momentum fraction of the incident proton carried by the colourless
exchange $x_{\pom}$ and $\beta=x/x_{\pom}$, where 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.
Proc. of DIS 2012, 459 - 462; DESY-PROC-2012-02; ISSN 1435-8077