The near threshold total cross section and angular distributions of K+K- pair production via the reaction pp --> ppK+K- have been studied at an excess energy of Q = 17 MeV using the COSY-11 facility at the cooler synchrotron COSY. The obtained cross section as well as an upper limit at an excess energy of Q = 3 MeV represent the first measurements on the K+K- production in the region of small excess energies where production via the channel pp --> pp Phi --> ppK+K- is energetically forbidden. The possible influence of a resonant production via intermediate scalar states f0(980) and a0(980) is discussed.
@article{arxiv.nucl-ex/0103001,
title = {Near Threshold K+K- Meson-Pair Production in Proton-Proton Collisions},
author = {C. Quentmeier and H. -H. Adam and J. T. Balewski and A. Budzanowski and D. Grzonka and L. Jarczyk and A. Khoukaz and K. Kilian and P. Kowina and N. Lang and T. Lister and P. Moskal and W. Oelert and R. Santo and G. Schepers and T. Sefzick and S. Sewerin and M. Siemaszko and J. Smyrski and A. Strzalkowski and M. Wolke and P. Wuestner and W. Zipper},
journal= {arXiv preprint arXiv:nucl-ex/0103001},
year = {2009}
}
Comments
8 pages, 6 figures, replaced with revised version, accepted for publication in Phys. Lett. B