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Very high energy nucleus-nucleus collisions and multi-chain model |
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| Authors: | Kinoshita Kisei Minaka Akira Sumiyoshi Hiroyuki |
| Affiliation: | 1. Inter-University Institute for High Energies (ULB-VUB), Brussels, Belgium 2. Universitaire Instelling Antwerpen, Belgium 3. European Organization for Nuclear Research, CERN, Geneva, Switzerland 4. Tel-Aviv University, Tel-Aviv, Israel 5. Sezione INFN and Istituto di Scienze Fisiche, Genova, Italy 6. Genova University, Genova, Italy 7. Faculté des Sciences, Université de l'Etat, Mons, Belgium 8. University of Athens, Greece 9. University of Nijmegen, Nijmegen, The Netherlands 10. Institute for High Energy Physics, Serpukhov, USSR |
| Abstract: | Inclusive and semi-inclusive production of Λ and (bar Lambda) inK + p interactions is studied at an incident momentum of 70 GeV/c. Cross sections and single particle distributions are presented and compared with data at lower energies. Scaling is observed between 32 and 70 GeV/c in the Feynmanx variable in the target and the beam fragmentation regions for Λ and (bar Lambda) inclusive production respectively. An increase of Λ ( (bar Lambda) ) production is observed in the beam (target) fragmentation regions, whereas the data at 70 and 32 GeV/c are reasonably close in the central region. The dependence of the Λ( (bar Lambda) ) polarization as a function ofx is measured and found to be in general agreement with the results at 32 GeV/c. The (Λ (bar Lambda) ) pair production cross section increases significantly from 32 to 70 GeV/c. The Λ and (bar Lambda) production associated with an identified proton is also studied. |
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