Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2003-02-12
Nucl.Phys.A721:683-686,2003
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 2 figures, Talk given by P. Moskal at 16th International Conference on Particles and Nuclei (PANIC 02), Osaka, Japan,
Scientific paper
10.1016/S0375-9474(03)01152-7
Exclusive data on the reactions pp -> ppK+K- and pp -> pK+ Lambda/Sigma0 have been taken at the cooler synchrotron COSY close to threshold. At equal excess energies, an enhancement of the Lambda/Sigma0 ratio by one order of magnitude has been observed compared to data at higher excess energies. New results obtained at the COSY-11 facility explore the transition region between this low-energy Sigma0 suppression and excess energies of 60 MeV. A first total cross section for elementary antikaon production below the phi threshold has been determined, two orders of magnitude smaller compared to kaon production at the same excess energy.
Adam H.-H.
Budzanowski Andrzej
Czyzykiewicz Rafal
Grzonka D.
Janusz M.
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