Measurement of Dijet Production in Diffractive Deep-Inelastic Scattering with a Leading Proton at HERA

TL;DR

This paper reports the measurement of dijet production in diffractive deep-inelastic scattering at HERA, comparing experimental data with QCD predictions and Monte Carlo models to enhance understanding of diffraction phenomena.

Contribution

It provides the first detailed measurement of diffractive dijet production with a leading proton, testing QCD predictions and diffractive parton distribution functions.

Findings

Differential cross sections agree with next-to-leading order QCD predictions.

Data supports the validity of diffractive parton distribution functions.

Results are consistent with leading order Monte Carlo models.

Abstract

The cross section of diffractive deep-inelastic scattering ep \rightarrow eXp is measured, where the system X contains at least two jets and the leading final state proton is detected in the H1 Forward Proton Spectrometer. The measurement is performed for fractional proton longitudinal momentum loss xIP < 0.1 and covers the range 0.1 < |t| < 0.7 GeV2 in squared four-momentum transfer at the proton vertex and 4 < Q2 < 110 GeV2 in photon virtuality. The differential cross sections extrapolated to |t| < 1 GeV2 are in agreement with next-toleading order QCD predictions based on diffractive parton distribution functions extracted from measurements of inclusive and dijet cross sections in diffractive deep-inelastic scattering. The data are also compared with leading order Monte Carlo models.