Finite temperature effects on the K-bar optical potential

By solving the Bethe-Goldstone equation, we have obtained the K-bar optical potential from the K-barN effective interaction in nuclear matter at T=0. We have extended the model by incorporating finite temperature effects in order to adapt our calculations to the experimental conditions in heavy-ion collisions. In the rank of densities (0-2ρ0), the finite temperature K-bar optical potential shows a smooth behavior if we compare it to the T=0 outcome. Our model has also been applied to the study of the ratio between K+ and K- produced at GSI with T around 70 MeV. Our results point at the necessity of introducing an attractive K-bar optical potential