Energy Dependence of the Pomeron Spin-Flip
Abstract
There is no theoretical reason to think that the spin-flip component of the Pomeron is zero. One can measure the spin-flip part using Coulomb-nuclear interference (CNI). Perturbative QCD calculations show that the spin-flip component is sensitive to the smallest quark separation in the proton, while the non-flip part probes the largest separation. According to HERA results on the proton structure function at very low x the energy dependence of the cross-section correlates with the size of the color dipole. Analysing the data from HERA we predict that the ratio of the spin-flip to non-flip amplitude grows with energy as , violating Regge factorisation of the Pomeron.
Keywords
Cite
@article{arxiv.hep-ph/9806284,
title = {Energy Dependence of the Pomeron Spin-Flip},
author = {B. Z. Kopeliovich and B. Povh},
journal= {arXiv preprint arXiv:hep-ph/9806284},
year = {2011}
}
Comments
A few comments and references are added. Based on invited talks at the International Workshop on Diffraction Physics, Rio de Janeiro, February 16-20, 1998, and at DIS'98, Brussels, April 4-8, 1998