Pion reabsorption in heavy-ion collisions interpreted in terms of the #DELTA# capture process

Ballester, F.; Diaz, J.; Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany); Hlavac; Holzmann, R.; Kulessa, R.; Lautridou, P.; Lefevre, F.; Loehner, H.; Marin, A.; Marques, M.; Martinez, G. (Instituto de Fisica Corpuscular, Valencia (Spain)); Matulewicz, T.; Metag, V.; Mittig, W.; Niebur, W.; Novotny, R. (Giessen Univ. (Germany). 2. Physikalisches Inst.); Ostendorf, R.W.; Pol, J.H.G. van; Quebert, J. (Bordeaux-1 Univ., 33 - Gradignan (France). Centre d'Etudes Nucleaires); Roussel-Chomaz, P.; Schubert, A.; Schutz, Y. (Grand Accelerateur National d'Ions Lourds (GANIL), 14 - Caen (France)); Siemssen, R.H.; Simon, R.S. (Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)); Wagner, V. (Nuclear Physics Inst., Rez (Czech Republic)); Wilschut, H.W. (Groningen Univ. (Netherlands). Kernfysisch Versneller Inst.)

Pion reabsorption in heavy-ion collisions interpreted in terms of the #DELTA# capture process

Abstract

We have measured energy-differential cross sections for #pi#"0 production in "3"6Ar+"1"9"7Au collisions at 95 MeV/u. From an analysis of spectral features due to pion final-state interactions we have estimated the cross section of the capture process #DELTA#+N#->#N+N in the center-of-mass energy range #sq root#s#approx =#2.05-2.25 GeV. Within the frame of BUU calculations, our results support the extension of the detailed-balance principle to broad-width resonances. (orig.)23 refs.SIGLEAvailable from TIB Hannover: RO 801(95-67) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman

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