Abstract
Production of Lambda and Antilambda hyperons was measured in central Pb-Pb collisions at 40, 80, and beam energy on a fixed target. Transverse mass spectra and rapidity distributions are given for all three energies. The ratio at midrapidity and in full phase space shows a pronounced maximum between the highest BNL Alternating Gradient Synchrotron and CERN Super Proton Synchrotron energies, whereas the ratio exhibits a monotonic increase.
- Received 28 November 2003
DOI:https://doi.org/10.1103/PhysRevLett.93.022302
©2004 American Physical Society