Survey of experimental data
| dc.creator | Oeschler, Helmut | |
| dc.date | 2002-02-06 | |
| dc.date.accessioned | 2026-07-07T10:54:28Z | |
| dc.date.available | 2026-07-07T10:54:28Z | |
| dc.description | >A review of meson emission in heavy ion collisions at incident energies from SIS up to collider energies is presented. A statistical model assuming chemical equilibrium and local strangeness conservation (i.e. strangeness conservation per collision) explains most of the observed features. Emphasis is put onto the study of $K^+$ and $K^-$ emission at low incident energies. In the framework of this statistical model it is shown that the experimentally observed equality of $K^+$ and $K^-$ rates at ``threshold-corrected'' energies $\sqrt{s} - \sqrt{s_{th}}$ is due to a crossing of two excitation functions. Furthermore, the independence of the $K^+/K^-$ ratio on the number of participating nucleons observed between SIS and RHIC is consistent with this model. It is demonstrated that the $K^-$ production at SIS energies occurs predominantly via strangeness exchange and that this channel is approaching chemical equilibrium. The observed maximum in the $K^+/π^+$ excitation function is also seen in the ratio of strange to non-strange particle production. The appearance of this maximum around 30 $A\cdot$GeV is due to the energy dependence of the chemical freeze-out parameters $T$ and $μ_B$. | |
| dc.description | 13 pages, 14 figures, SQM2001 in Frankfurt, Sept. 2001, submitted to IOP | |
| dc.identifier | https://arxiv.org/abs/nucl-ex/0202003 | |
| dc.identifier | http://arxiv.org/abs/nucl-ex/0202003 | |
| dc.identifier | J.Phys.G28:1787-1800,2002 | |
| dc.identifier | doi:10.1088/0954-3899/28/7/333 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/185808 | |
| dc.subject | Nuclear Experiment | |
| dc.title | Survey of experimental data | |
| dc.type | text |