Diffractive Dijet Production with a Leading Proton in ep Collisions at HERA

TL;DR

This paper measures the cross section of diffractive dijet production with a leading proton in ep collisions at HERA, comparing results to NLO QCD predictions to test diffractive parton distribution functions.

Contribution

It provides the first detailed measurement of diffractive dijet production with a leading proton at HERA across different Q^2 regimes, testing QCD models against experimental data.

Findings

Measured cross sections in photoproduction and deep-inelastic scattering.

Good agreement with NLO QCD calculations based on diffractive PDFs.

Enhanced understanding of diffractive processes in ep collisions.

Abstract

The cross section of the diffractive process e^+p -> e^+Xp is measured at a centre-of-mass energy of 318 GeV, where the system X contains at least two jets and the leading final state proton p is detected in the H1 Very Forward Proton Spectrometer. The measurement is performed in photoproduction with photon virtualities Q^2 <2 GeV^2 and in deep-inelastic scattering with 4 GeV^2<Q^2<80 GeV^2. The results are compared to next-to-leading order QCD calculations based on diffractive parton distribution functions as extracted from measurements of inclusive cross sections in diffractive deep-inelastic scattering.