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$$phi$$ meson properties in nuclear matter from dilepton spectra in a transport approach

Gubler, P. ; Bratkovskaya, E.*; Song, T.*

There is presently no consensus on how the $$phi$$ meson mass and width will change once it is put in a dense environment such as nuclear matter. While many theoretical works exist, connecting them with experimental measurements remains non-trivial task, as the $$phi$$ meson in nuclear matter is usually produced in relatively high-energy pA (p: proton, A: nucleus) reactions, which are generally non-equilibrium processes. In this presentation I will report on an ongoing project, attempting to simulate pA reactions in which the $$phi$$ meson is produced in nuclei, making use of a transport approach. Results of simulations of 12 GeV/30 GeV p+C and p+Cu reactions will be presented and comparisons between obtained dilepton spectra and experimental data of the E325 experiment at KEK will be made. Furthermore, predictions for the ongoing J-PARC E16 experiment for both dilepton and $$K^+K^-$$ spectra will be given and discussed.



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