Omega and Antiomega production in central Pb+Pb collisions at 40 and 158 AGeV

Abstract

Results are presented on Omega production in central Pb+Pb collisions at 40 and 158 AGeV beam energy. Given are transverse-mass spectra, rapidity distributions, and total yields for the sum Omega+Antiomega at 40 AGeV and for Omega and Antiomega separately at 158 AGeV. The yields are strongly under-predicted by the string-hadronic UrQMD model and are in better agreement with predictions from a hadron gas models.

5 papes, 4 figures, 1 table, updated figure 4 and table 1. Final version, including some editorial changes, as published in PRL