Inelastic diffraction data and the Pomeron trajectory

Inelastic diffraction data and the effective Pomeron trajectory

A further analysis of inelastic diffraction data at the ISR and SPS-Collider confirms the relatively flat s–independent Pomeron trajectory in the high–|t| domain, 1 < |t| < 2 GeV2, reported earlier by the UA8 Collaboration. At |t| = 1.5 GeV2, α = 0.92± 0.03 is in agreement with the trajectories found in diffractive photoproduction of vector mesons at HERA. This suggests a universal fixed Pomero...

POMERON: BEYOND THE STANDARD APPROACH a

We discuss the experimental evidence supporting the concept of universality of the rapidity gap probability in soft and hard diffraction, relate the gap probability to hadronic parton densities, and present a phenomenological model of diffraction in which the structure of the Pomeron is derived from the structure of the parent hadron. Predictions for diffractive deep inelastic scattering are co...

Nonlinear Pomeron trajectory in diffractive deep inelastic scattering.

Factorization and Scaling in Hadronic Diffraction

In standard Regge theory, the contribution of the tripe-pomeron amplitude to the t = 0 differential cross section for single diffraction dissociation has the form dσ/dMdt|t=0 ∼ (s/s0)IP (0)−1]/(M2)αIP (0), where αIP (t) is the pomeron trajectory. For αIP (0) > 1, this form, which is based on factorization, does not scale with energy. From an analysis of pp and p̄p data from fixed target to colli...

Results on Hard Diffractive Production

The results of experiments at hadron colliders probing the structure of the pomeron through hard diffraction are reviewed. Some results on deep inelastic diffractive scattering obtained at HERA are also discussed and placed in perspective. By using a properly normalized pomeron flux factor in single diffraction dissociation, as dictated by unitarity, the pomeron emerges as a combination of vale...