The compatibility of diffractive hard scattering in pp̄ and ep collisions

We show that the data for diffractive dijet production at the Tevatron pp̄ collider are consistent with diffractive deep inelastic ep data collected at HERA. The breakdown of factorization between the two data sets is naturally explained by a strong tendency to populate the rapidity gap in the pp̄ diffractive process by secondaries from soft underlying interactions and by bremsstrahlung associated with the presence of the hard dijet subprocess.