The production of eta mesons has been measured in the proton-proton interaction close to the reaction threshold using the COSY-11 internal facility at the cooler synchrotron COSY. Total cross sections were determined for eight different excess energies in the range from 0.5 MeV to 5.4 MeV. The energy dependence of the total cross section is well described by the available phase-space volume weighted by FSI factors for the proton-proton and proton-eta pairs.
@article{arxiv.nucl-ex/9912011,
title = {Near-Threshold eta Meson Production in Proton-Proton Collisions},
author = {J. Smyrski and P. Wuestner and A. Budzanowski and H. Dombrowski and D. Grzonka and L. Jarczyk and M. Jochmann and A. Khoukaz and K. Kilian and P. Kowina and M. Koehler and P. Moskal and W. Oelert and C. Quentmeier and R. Santo and G. Schepers and U. Seddik and T. Sefzick and S. Sewerin and A. Strzalkowski and M. Wolke},
journal= {arXiv preprint arXiv:nucl-ex/9912011},
year = {2009}
}