Strangeness Production in Proton-Proton Collisions Close to Threshold

Abstract

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.

arXiv comment4 pages, 2 figures, Talk given by P. Moskal at 16th International Conference on Particles and Nuclei (PANIC 02), Osaka, Japan, 30 Sep - 4 Oct 2002

References in corpus (13)

• Resonance model study of kaon production in baryon baryon reactions for heavy ion collisions
• $\varphi$ and $\omega$ Meson Production in pp Reactions at $p_{lab}$=3.67 GeV/c
• Close-to-threshold Meson Production in Hadronic Interactions
• Total Cross Section of the Reaction pp \to pK^+ΛClose to Threshold
• Comparison of Lambda and Sigma(0) Threshold Production in Proton-Proton Collisions
• Antikaon production in nucleon-nucleon reactions near threshold
• Meson-meson scattering: $K\overline{K}$-thresholds and $f_0(980)-a_0(980)$ mixing
• Near Threshold K+K- Meson-Pair Production in Proton-Proton Collisions
• The reactions $pp\to p\Lambda K^{+}$ and $pp\to p{\Sigma }^0{K}^{+}$ near their thresholds
• Identifying the quark content of the isoscalar scalar mesons f_0(980), f_0(1370), and f_0(1500) from weak and electromagnetic processes
• Role of N*(1650) in the near threshold pp --> p Lambda K+ and pp --> p Sigma0 K+ reactions
• The Reaction $pp\to p\Lambda K^{+}$ Near Threshold
• Strangeness Production by Electromagnetic and Hadronic Probes

Cited by in corpus (1)

• Strangeness Production Process $pp\to n{K}^{+}{\Sigma }^{+}$ within Resonance Model