" Charmonium (c¯ c) mass in antiproton-nucleus reactions, how the in-medium gluon condensate can be measured" by György Wolf (MTA Wigner RCP)
Friday, January 26th, 2018 from 14:00 to 15:00 (Europe/Budapest)
at KFKI campus ( Bldg.3. Meeting Room )
The masses of the low lying charmonium states, namely, the J/Ψ, Ψ(3686), and Ψ(3770) are shifted downwards due to the second order Stark effect. In p¯+Au collisions at 6−10~GeV we study their in-medium propagation. The time evolution of the spectral functions of these charmonium states is studied with a Boltzmann-Uehling-Uhlenbeck (BUU) type transport model. We show that their in-medium mass shift can be observed in the dilepton spectrum. Therefore, by observing the dileptonic decay channel of these low lying charmonium states, especially for Ψ(3686), we can gain information about the magnitude of the gluon condensate in nuclear matter. This measurement could be performed at the upcoming PANDA experiment at FAIR.