Experimental study of the pd{yields}{sup 3}He K{sup +}K{sup -} and pd{yields}{sup 3}He {phi} reactions close to threshold
- Helmholtz-Institut fuer Strahlen-und Kernphysik der Universitaet Bonn, D-53115 Bonn (Germany)
- Institut fuer Kernphysik, Forschungszentrum Juelich, D-52425 Juelich (Germany)
- Institute of Nuclear Physics, Polish Academy of Sciences, Krakow (Poland)
- Institute of Physics, Jagellonian University, PL-30059 Krakow (Poland)
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 {sup 3}He and a vertex detector to measure the K{sup +}K{sup -} pair. Differential and total cross sections are presented for the production of {phi}-mesons, decaying through {phi}{yields}K{sup +}K{sup -}, as well as for prompt K{sup +}K{sup -} production. The prompt production seems to follow phase space in both its differential distributions and in its energy dependence. The amplitude for the pd{yields}{sup 3}He{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{sup +}K{sup -} 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{sub 0}(980) production is found in the data.
- OSTI ID:
- 20990972
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 75, Issue 1; Other Information: DOI: 10.1103/PhysRevC.75.015204; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
Similar Records
Near Threshold Two Meson Production with the pd {yields} {sup 3}He{pi}{sup +}{pi}{sup {minus}} and pd {yields} {sup 3}HeK{sup +}K{sup {minus}} Reactions
Study of scalar meson f{sub 0}(980) and K{sub 0}{sup *}(1430) from B{yields}f{sub 0}(980){rho}({omega},{phi}) and B{yields}K{sub 0}{sup *}(1430){rho}({omega}) decays