Abstract
Predictions for the diffractive photoproduction of the γ-family at HERA energies, within the framework of the analysis by Frankfurt, Koepf and Strikman, are presented. Two novel effects lead to a significant enhancement of the original calculation: the non-diagonal (or skewed) kinematics, calculated to leading-log(Q2) accuracy, and the large magnitude of the real part of the amplitude. The resultant cross sections are found to agree fairly well with recent preliminary data from ZEUS and HI. A strong correlation between the mass of the diffractively produced state and the energy dependence of the cross section is found. In particular, a considerably stronger rise in energy is predicted than that found in J/ψ-production.
| Original language | English (US) |
|---|---|
| Pages (from-to) | XII-13 |
| Journal | Journal of High Energy Physics |
| Volume | 3 |
| Issue number | 2 |
| State | Published - 1999 |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics