The Near-Threshold Production of Phi Mesons in pp Collisions
High Energy Physics - Experiment
2009-11-11 v2 Nuclear Experiment
Abstract
The pp->pp phi reaction has been studied at the Cooler Synchrotron COSY-Juelich, using the internal beam and ANKE facility. Total cross sections have been determined at three excess energies epsilon near the production threshold. The differential cross section closest to threshold at epsilon=18.5 MeV exhibits a clear S-wave dominance as well as a noticeable effect due to the proton-proton final state interaction. Taken together with data for pp omega-production, a significant enhancement of the phi/omega ratio of a factor 8 is found compared to predictions based on the Okubo-Zweig-Iizuka rule.
Cite
@article{arxiv.hep-ex/0604010,
title = {The Near-Threshold Production of Phi Mesons in pp Collisions},
author = {M. Hartmann and Y. Maeda and I. Keshelashvilli and H. R. Koch and S. Mikirtytchiants and S. Barsov and W. Borgs and M. Buescher and V. I. Dimitrov and S. Dymov and V. Hejny and V. Kleber and V. Koptev and P. Kulessa and T. Mersmann and S. Merzliakov and A. Mussgiller and M. Nekipelov and M. Nioradze and H. Ohm and K. Pysz and R. Schleichert and H. J. Stein and H. Stroeher and K. -H. Watzlawik and P. Wuestner},
journal= {arXiv preprint arXiv:hep-ex/0604010},
year = {2009}
}
Comments
4 Pages, 3 Figures, 1 Table, submitted to Phys. Rev. Lett