- th / 0 31 20 51 v 1 1 5 D ec 2 00 3 1 In - medium effects on the K − / K + ratio at GSI
نویسندگان
چکیده
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 reproduces the " broad-band equilibration " advocated by Brown being the spectral density crucial to explain an enhanced K − /K + ratio.
منابع مشابه
- th / 0 31 20 51 v 2 2 6 Ja n 20 05 1 In - medium effects on the K − / K + ratio at GSI
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 s...
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متن کامل- th / 0 40 70 35 v 2 1 3 Ju l 2 00 4 In - medium properties of antikaons at finite temperature : the K − / K + ratio at GSI
The K−/K+ ratio in heavy-ion collisions at GSI is studied including the properties of the participating hadrons in hot and dense matter, paying a particular attention to the in-medium properties of antikaons at finite temperature. The determination of the temperature and chemical potential at freeze-out conditions compatible with the ratio K−/K+ is very delicate, and depends on the approach ado...
متن کامل- th / 0 40 70 35 v 1 1 2 Ju l 2 00 4 In - medium properties of antikaons at finite temperature : the K − / K + ratio at GSI
The K−/K+ ratio in heavy-ion collisions at GSI is studied including the properties of the participating hadrons in hot and dense matter, paying a particular attention to the in-medium properties of antikaons at finite temperature. The determination of the temperature and chemical potential at freeze-out conditions compatible with the ratio K−/K+ is very delicate, and depends on the approach ado...
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