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| Hauptseite > Publikationsdatenbank > Experimental study of the pd-->3He K+K- and pd-->3He phi reactions close to threshold |
| Hauptseite > Publikationsdatenbank > Experimental study of the pd-->3He K+K- and pd-->3He phi reactions close to threshold |
| Journal Article | PreJuSER-59034 |
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2007
Inst.
Woodbury, NY
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Please use a persistent id in citations: http://hdl.handle.net/2128/10563 doi:10.1103/PhysRevC.75.015204
Abstract: Two-kaon production in proton-deuteron collisions has been studied at three energies close to threshold using a calibrated magnetic spectrograph to measure the final He-3 and a vertex detector to measure the K+K- pair. Differential and total cross sections are presented for the production of phi-mesons, decaying through phi -> K+K-, as well as for prompt K+K- production. The prompt production seems to follow phase space in both its differential distributions and in its energy dependence. The amplitude for the pd -> He-3 phi reaction varies little for excess energies below 22 MeV and the value is consistent with that obtained from a threshold measurement. The angular distribution of the K+K- decay pair shows that near threshold the phi-mesons are dominantly produced with polarization m=0 along the initial proton direction. No conclusive evidence for f(0)(980) production is found in the data.
Keyword(s): p deuteron: exclusive reaction ; K: pair production ; Phi(1020): hadroproduction ; Phi(1020): hadronic decay ; threshold ; channel cross section: energy dependence ; angular distribution: (K+ K) ; Phi(1020): polarization ; f0(980) ; experimental results ; Juelich COSY PS ; p deuteron --> helium-3 K+ K- ; p deuteron --> helium-3 Phi(1020) ; Phi(1020) --> K+ K-
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