Author/Authors :
PS185 Collaboration، نويسنده , , P.D Barnes، نويسنده , , W Breunlich، نويسنده , , Dennert، J. نويسنده , , R.A. Eisenstein، نويسنده , , W Eyrich، نويسنده , , H Fischer، نويسنده , , G Franklin، نويسنده , , J Franz، نويسنده , , Frankenberg-Garcia، Ana نويسنده , , R Geyer، نويسنده , , N Hamann، نويسنده , , D.W. Hertzog، نويسنده , , T Johansson، نويسنده , , K Kilian، نويسنده , , M Kirsch، نويسنده , , R.A Kraft، نويسنده , , W Oelert، نويسنده , , B Quinn، نويسنده , , K R?hrich، نويسنده , , et al.، نويسنده ,
Abstract :
The reactions pp → ∑+∑+ and pp → ∑−∑− have been investigated at GeV/c beam momentum by the PS185 Collaboration at LEAR, CERN. Of both reaction types together 170 events could be identified. The cross section of the reaction pp → ∑+∑+ was determined to be σtot = 3.68 ± 0.43 μb at an excess energy of 23 MeV. Its angular distribution exhibits a pronounced forward peaking. The ratio of the cross sections σ(pp → ∑+∑+)σ(pp → ∑−∑−) = 2.4−1.3+3.0 was extracted with a confidence limit of 90%. It is the first time that experimental data of these reaction channels are available close to the threshold. We compare our results with those of earlier experiments and with theoretical predictions.
