Inelastic diffraction data and the effective Pomeron trajectory
Abstract
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, 1-2 GeV^2, reported earlier by the UA8 Collaboration. At |t| = 1.5 GeV^2, alpha = 0.92 +/- 0.03 is in agreement with the trajectories found in diffractive photoproduction of vector mesons at HERA. This suggests a universal fixed Pomeron trajectory at high-|t|. We also show that a triple-Regge Pomeron-exchange parametrization fit to the data requires an s-dependent (effective) Pomeron trajectory intercept, alpha(0), which decreases with increasing s, as expected from unitarization (multi-Pomeron-exchange) calculations. alpha(0) = 1.10 at the lowest ISR energy, 1.03 at the SPS-Collider and perhaps smaller at the Tevatron.
Cite
@article{arxiv.hep-ex/9909035,
title = {Inelastic diffraction data and the effective Pomeron trajectory},
author = {Samim Erhan and Peter E. Schlein},
journal= {arXiv preprint arXiv:hep-ex/9909035},
year = {2009}
}
Comments
LATEX, 12 pages, 7 EPS figures; Revised version, as is appearing in Physics Letters. Original version was submitted by mistake to hep-ex, instead of to hep-ph