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Direct reactions with pion production in nucleus-nucleus collisions
Title Direct reactions with pion production in nucleus-nucleus collisions Author info D. N. Voskresenskii, E. E. Kolomeitsev Author Voskresensky Dmitri (50%)
Co-authors Kolomeitsev Evgeni E. 1970- (50%)
Source document Physics of Atomic Nuclei. Vol. 56, no. 2 (1993), pp. 252-259. - New York : Pleiades Publishing, 1993 Keywords Pion-production nucleus-nucleus collisions Form. Descr. články - journal articles Language English Country United States of America Annotation Various processes of pion production in nuclear matter at characteristic temperatures T much less than m(pi) are analyzed. It is shown that the pions are produced mainly in NN --> NN(pi) reactions. Taking into account the modification of the NN interaction in nucelar matter, probabilities and differential cross sections of production of pi- mesons in direct NN --> NNpi- reactions are calculated. It is shown that at incident-pion momenta q approximately 2m(pi) processes with pion production via DELTA-resonance intermediate states dominate. From a comparison of the results of the calculation with experimental data on pion production in nucleus-nucleus collisions it is concluded that piN absorption is strong and increases with increasing temperature and density of the nuclear matter. At the initial stage of development of the nuclear fireball the pions are confined inside the system at practically all momenta. Soft (q less-than-or-similar-to m(pi)) pions are emitted at the intermediate stage of expansion of the nuclear fireball, and harder pions are released together with nucleons at the final stage of breakup of the fireball. URL Link do databázy WoS Public work category ADE No. of Archival Copy 25471 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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