Production ofK+K−pairs in proton-proton collisions at 2.83 GeV
Copyright policy )Production ofK+K−pairs in proton-proton collisions at 2.83 GeV
Differential and total cross sections for the pp -> ppK+K- reaction have been measured at a proton beam energy of 2.83 GeV using the COSY-ANKE magnetic spectrometer. Detailed model descriptions fitted to a variety of one-dimensional distributions permit the separation of the pp -> pp phi cross section from that of non-phi production. The differential spectra show that higher partial waves represent the majority of the pp -> pp phi total cross section at an excess energy of 76 MeV, whose energy dependence would then seem to require some s-wave phi-p enhancement near threshold. The non-phi data can be described in terms of the combined effects of two-body final state interactions using the same effective scattering parameters determined from lower energy data.
12 pages, 12 figures, 3 tables
- University of Bonn Germany
- University of Basel Switzerland
- Physics department Switzerland
- INSTITUTE FOR NUCLEAR RESEARCH OF THE RUSSIAN ACADEMY OF SCIENCES Russian Federation
- Duke University United States
2.83 GeV, Nuclear Theory, p p: exclusive reaction, partial wave, FOS: Physical sciences, p p --> Phi(1020) 2p, Juelich COSY PS, energy dependence, differential cross section: measured, Nuclear Theory (nucl-th), K: pair production, Phi(1020): hadroproduction, Nuclear Experiment (nucl-ex), info:eu-repo/classification/ddc/530, Nuclear Experiment, ANKE, p p --> 2p K+ K-, final-state interaction, channel cross section: measured, experimental results
2.83 GeV, Nuclear Theory, p p: exclusive reaction, partial wave, FOS: Physical sciences, p p --> Phi(1020) 2p, Juelich COSY PS, energy dependence, differential cross section: measured, Nuclear Theory (nucl-th), K: pair production, Phi(1020): hadroproduction, Nuclear Experiment (nucl-ex), info:eu-repo/classification/ddc/530, Nuclear Experiment, ANKE, p p --> 2p K+ K-, final-state interaction, channel cross section: measured, experimental results
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