Article ID Journal Published Year Pages File Type
9851187 Nuclear Physics A 2005 5 Pages PDF
Abstract
The in-medium modifications on the K−/K+ ratio produced at GSI are studied. Particular attention is paid to the properties of antikaons, which determine the chemical potential and temperature at freeze-out conditions. Different approaches have been considered: non-interacting K−, on-shell self-energy and single-particle spectral density. We observe that the full off-shell approach to the spectral density reproduces the Brown et al. “broad-band equilibration” which is crucial to explain an enhanced K−/K+ ratio.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Nuclear and High Energy Physics
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