Baryon stopping and strange baryon/antibaryon production at SPS energies
- The amount of proton stopping in central Pb+Pb collisions from 20 160 A·GeV as well as hyperon and antihyperon rapidity distributions are calcu- lated within the UrQMD model in comparison to experimental data at 40, 80 and 160 A·GeV taken recently from the NA49 collaboration. Further- more, the amount of baryon stopping at 160 A·GeV for Pb + Pb collisions is studied as a function of centrality in comparison to the NA49 data. We find that the strange baryon yield is reasonably described for central colli- sions, however, the rapidity distributions are somewhat more narrow than the data. Moreover, the experimental antihyperon rapidity distributions at 40, 80 and 160 A·GeV are underestimated by up to factors of 3 - depending on the annihilation cross section employed - which might be addressed to missing multi-meson fusion channels in the UrQMD model. PACS 25.75.+r
| Author: | Henning WeberGND, Elena L. BratkovskayaORCiDGND, Horst StöckerORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30-21240 |
| Document Type: | Preprint |
| Language: | English |
| Date of Publication (online): | 2005/11/16 |
| Year of first Publication: | 2002 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2005/11/16 |
| Tag: | Relativistic heavy-ion collisions |
| Note: | Version 1 ersch. u.d.T.: Baryon stopping as a probe for highly excited nuclear matter |
| Source: | [nucl-th/0205032v2] (May 2002, last revised 4 Nov 2002) 18 p. Version 2 |
| HeBIS-PPN: | 188748814 |
| Institutes: | Physik / Physik |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Licence (German): |  Deutsches Urheberrecht |
