Experimental results on strangeness production in proton-proton collisions at COSY

Abstract

The production of K+ and K- mesons in elementary proton-proton collision has been investigated at the Cooler Synchrotron COSY in Juelich. A high quality proton beam with low emittance and small momentum spread permitted to study the creation of these mesons very close to the kinematical threshold. The energy dependence of the total cross section is investigated using internal beam facilities providing a high accuracy particle momentum determination as well as an external non-magnetic detection setup with a large geometrical acceptance. The determination of the four-momentum vectors for all ejectiles of each registered event gives the complete kinematical information allowing to study the interaction of the outgoing particles. Results on the performed studies of the pp --> pp K+ K-, pp --> p Lambda K+ and pp --> p Sigma0 K+ reactions will be presented and their relevance to the interpretation of heavy ion collisions will be discussed.

arXiv comment8 pages, 6 figures, plenary talk at 6th International Conference On Strange Quarks in Matter: '2001 - A Flavorspace Odyssey' (SQM2001), Frankfurt, Germany, September 25-29, 2001, to be published in J. Phys. G: Nucl. Part. Phys

References in corpus (16)

• In-medium Production of Kaons at the Mean-Field Level
• Medium Effects in Kaon and Antikaon Production in Nuclear Collisions at Subthreshold Beam Energies
• Comparison of eta and eta' production in the pp -> pp eta(eta') reactions near threshold
• First Measurement of Antikaon Phase-Space Distributions in Nucleus-Nucleus Collisions at Subthreshold Beam Energies
• Total Cross Section of the Reaction pp \to pK^+ΛClose to Threshold
• Comparison of Lambda and Sigma(0) Threshold Production in Proton-Proton Collisions
• Near-Threshold eta Meson Production in Proton-Proton Collisions
• ${\eta }^{\prime }$ production in proton-proton scattering close to threshold}
• Energy Dependence of the Near-Threshold Total Cross-Section for the pp --> pp eta' Reaction
• S-wave eta'-proton FSI; phenomenological analysis of near-threshold production of pi0, eta, and eta' mesons in proton-proton collisions
• Antikaon production in nucleon-nucleon reactions near threshold
• 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
• K${}^{-}$ Meson Production in the Proton-Proton Reaction at 3.67 GeV/c
• Low-Energy $Λ-\p$ Scattering Parameters from the $pp\to p{K}^{+}\Lambda$ Reaction
• Strange Mesons as a Probe for Dense Nuclear Matter

Cited by in corpus (4)

• Close-to-threshold Meson Production in Hadronic Interactions
• Generalized Dalitz Plot analysis of the near threshold pp-->ppK+K- reaction in view of the K+K- final state interaction
• Strangeness Production Process $pp\to n{K}^{+}{\Sigma }^{+}$ within Resonance Model
• Study of the hadronic production of kaon pairs below the threshold for the phi meson