par George, R.;Goldschmidt-Clermont, Yves 
;Henri, Victor;Jongejans, B.;Krammer, Margarete;Muller, Francis;Perreau, J.-M.;De Baere, W.;Debaisieux, J.;Dufour, Pierre;Grard, Fernand ;Heughebaert, Jacques ;Pape, Luc;Peeters, Philippe ;Verbeure, F;Windmolders, Roland
Référence Nuovo cimento. A., 49, 1, page (9-32)
Publication Publié, 1967-05
;Henri, Victor;Jongejans, B.;Krammer, Margarete;Muller, Francis;Perreau, J.-M.;De Baere, W.;Debaisieux, J.;Dufour, Pierre;Grard, Fernand ;Heughebaert, Jacques ;Pape, Luc;Peeters, Philippe ;Verbeure, F;Windmolders, RolandRéférence Nuovo cimento. A., 49, 1, page (9-32)
Publication Publié, 1967-05
Article révisé par les pairs
| Résumé : | From a study of the four-body final state K+p→K Nππ at 3.5 and 5 GeV/c it is found that the quasi-two-body reaction K+p→K*(892)N*(1236) is produced in large amount. This reaction shows the same general behaviour as obtained at 3 GeV/c: sharply peaked production angular distributions suggesting peripheralism as the mechanism of production. The experimental angular distributions are compared with the predictions of three models:a) one-pion exchange with arbitrary form factors, b) absorption with pion exchange, c) simple Reggepole exchange. The results show that the absorption model with π exchange predicts the shape for the production angular distribution reasonably well but less well the energy dependence of the production cross-section. It predicts rather well the general trend of the density matrix elements characterizing the decay distributions. It also succeeds in accounting for the experimental angular correlations between the K* and N* decay. The simple Regge-pole exchange gives acceptable results for both the shape and energy variation of the production angular distributions. The observed K*(1400)N*(1236) reaction at 5 GeV/c gave production and decay distributions in qualitative agreement with a 2+ K*(1400) produced in a π exchange process. © 1967 Società Italiana di Fisica. |
