Hyperon and Charged Kaon Pair Production Close to Threshold
Close-to-threshold data on the elementary kaon and antikaon production channels in the proton{endash}proton interaction have been taken using the COSY-11 installation at the cooler synchrotron COSY Juelich. The experimental technique applied at the internal COSY-11 facility{emdash}designed for meson production studies at small excess energy{emdash}is outlined. The threshold excitation functions for the kaon{endash}hyperon production via the reactions pp {yields} pK{sup +}{Lambda} and pp {yields} pK{sup +}{Sigma}{sup 0} are presented. The magnitude of the production amplitudes is compared at equal excess energies, and physical implications of the observed {Sigma}{sup 0} suppression in the threshold region are discussed. In addition, within a Dalitz plot analysis the spin-averaged S-wave scattering parameters could be extracted for the {Lambda}{endash}p channel. With the possibility of detecting all final state particles the elementary antikaon production in the reaction pp {yields} ppK{sup +}k{sup {minus}} has been investigated. Results on the exclusive total cross section fix the scale of the strangeness dissociation into two kaons.
- Research Organization:
- Institut fuer Kernphysik, Forschungszentrum Juelich, Juelich (DE); Institut fuer Kernphysik, Westfaelische Wilhelms-Universitaet, Muenster (DE); Institute of Nuclear Physics, Cracow (PL); Indiana University Cooler Facility, Bloomington, Indiana (US); Institute of Physics, Jagellonian University, Cracow (PL); Zentrallabor fuer Elektronik, Forschungszentrum Juelich, Juelich (DE); Institute of Physics, University of Silesia, Katowice (PL); Egyptian Atomic Energy Authority, Cairo (EG)
- Sponsoring Organization:
- None (US)
- OSTI ID:
- 784263
- Report Number(s):
- NONE; ISBN 1-56396-928-9; ISSN 0094-243X; CODEN APCPCS; ISBN 1-56396-928-9; ISSN 0094-243X; CODEN APCPCS
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANTIKAONS
DALITZ PLOT
ENERGY DEPENDENCE
EXCITATION FUNCTIONS
GEV RANGE 01-10
HYPERONS
KAONS MINUS
KAONS PLUS
LAMBDA PARTICLES
PAIR PRODUCTION
PARTICLE PRODUCTION
PROTON-PROTON INTERACTIONS
PROTONS
REACTION KINETICS
SCATTERING LENGTHS
SIGMA NEUTRAL PARTICLES
SIGMA PLUS PARTICLES
TOTAL CROSS SECTIONS