The total cross section of the reaction pp->ppK+K- has been measured at excess energies Q=10 MeV and 28 MeV with the magnetic spectrometer COSY-11. The new data show a significant enhancement of the total cross section compared to pure phase space expectations or calculations within a one boson exchange model. In addition, we present invariant mass spectra of two particle subsystems. While the K+K- system is rather constant for different invariant masses, there is an enhancement in the pK- system towards lower masses which could at least be partially connected to the influence of the Lambda(1405) resonance.
@article{arxiv.hep-ex/0602030,
title = {Kaon pair production close to threshold},
author = {P. Winter and M. Wolke and H. -H. Adam and A. Budzanowski and R. Czyzykiewicz and D. Grzonka and M. Janusz and L. Jarczyk and B. Kamys and A. Khoukaz and K. Kilian and P. Klaja and P. Moskal and W. Oelert and C. Piskor-Ignatowicz and J. Przerwa and J. Ritman and T. Rozek and T. Sefzick and M. Siemaszko and J. Smyrski and A. Taschner and P. Wustner and Z. Zhang and W. Zipper},
journal= {arXiv preprint arXiv:hep-ex/0602030},
year = {2008}
}