Author/Authors :
R Bilger، نويسنده , , A B?hm، نويسنده , , H Brand، نويسنده , , S Brand، نويسنده , , K.-Th Brinkmann، نويسنده , , H Clement، نويسنده , , M Dellert، نويسنده , , Dennert، J. نويسنده , , W Eyrich، نويسنده , , D Filges، نويسنده , , H Freiesleben، نويسنده , , M Fritsch، نويسنده , , R Geyer، نويسنده , , A Hassan، نويسنده , , J. Hauffe، نويسنده , , P Herrmann، نويسنده , , B Hübner، نويسنده , , P Jahn، نويسنده , , K Kilian، نويسنده , , M Kirsch، نويسنده , , et al.، نويسنده ,
Abstract :
The reaction pp→K+Λp was measured exclusively at the cooler synchrotron COSY at beam momenta of pBeam = 2.50 GeV/c and pBeam = 2.75 GeV/c using the TOF detector. Angular and momentum distributions were obtained for the full phase space of the reaction products. Total cross sections were extracted to be (2.7 ± 0.3) μb and (12.0 ± 0.4) μb, respectively. The polarization of the Λ-hyperon was determined as a function of its transversal momentum and was found to be negative for transverse momentum transfers of pT≥ 0.3 GeV/c. The results together with existing data are compared with phenomenological parametrizations and model calculations on the basis of meson exchange.
Keywords :
Associated strangeness production , Total cross section , Angular and momentum distributions , Polarization
