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A study of the charge-exchange reaction pp → nΔ++(1232) at ISR energies |
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| Authors: | H. De Kerret E. Nagy R.S. Orr M. Regler W. Schmidt-Parzefall K. Winter A. Brandt H. Dibon G. Flügge F. Niebergall P.E. Schumacher K.R. Schubert J.J. Aubert C. Broll G. Coignet J. Favier L. Massonnet M. Vivargent G. Neuhofer |
| Affiliation: | CERN, Geneva, Switzerland;II. Institut für Experimentalphysik, Hamburg, Germany;Institut für Hochenergiephysik, Universität Heidelberg, Germany;Laboratoire d''Annecy de Physique des Particules, Annecy, France;Institut für Hochenergiephysik, Vienna, Austria |
| Abstract: | We report on a study of the charge-exchange reaction pp → nΔ++(1232) at the CERN intersecting storage rings (ISR) in the energy range √s = 23 to 53 GeV. From our analysis of the energy dependence of the total cross-section, of the differential cross-section dσ/dt and of the decay angular distributions we find evidence that pion exchange is dominant up to √s = 23 GeV and that (?+A2) exchange dominates the reaction for √s ? 30 GeV, as described by simple Regge-pole models. |
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