Pion absorptionon4He into theppdfinal state
| Autor: | C. H. Q. Ingram, Mirko Planinic, H.J. Weyer, M. Wildi, K. Michaelian, A. Hoffart, M. Kroedel, Darko Androić, Damir Bosnar, R. P. Redwine, T. Dooling, K. Koch, K. E. Wilson, B. Kotliński, Neven Simicevic, G. Backenstoss, Tomislav Petković, R. Trezeciak, G. S. Kyle, P. A. M. Gram, Avraham Klein, D. Rowntree, J. Köhler, A. Lehmann, Miroslav Furić, N.K. Gregory, H. Ullrich, A.O. Mateos |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Physical Review C. 61 |
| ISSN: | 1089-490X 0556-2813 |
| Popis: | Results from a 4{pi} solid angle measurement of the reaction {pi}{sup +}+{sup 4}He{yields}ppd at incident pion energies of T{sub {pi}}{sup +}}=70, 118, 162, 239, and 330 MeV are presented. Integrated cross sections are given for the final states with energetic deuterons (ppd) and (pd)p. The differential cross sections are described by a complete set of five independent variables and various other kinematic variables and compared to cascade and phase space models where deuterons were formed by a semiclassical pickup model. The data are investigated for signatures of initial and final state interactions: it is found that more than half of the (ppd) yield cannot be explained by these mechanisms. The remaining strength is reasonably well reproduced by 3N phase space models followed by pickup. (c) 2000 The American Physical Society. |
| Databáze: | OpenAIRE |
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