arXiv subjects

G. Balassa

Publications and source records attributed to G. Balassa.

3 recordsLinked to original sources

arXiv2019

Charmonium Excitation functions in $\bar p$A Collisions

We study the excitation function of the low-lying charmonium state: $Ψ$(3686) in $\bar p$ Au collisions taking into account their in-medium propagation. The time evolution of the spectral functions of the charmonium state is studied with a BUU type transport model. We calculated the excitation function of $Ψ$(3686) production and show that it is strongly effected by the medium. The energy regime will be available for the PANDA experiment.

hep-ph↗

arXiv2017

Mass shift of charmonium states in $\bar p A$ collision

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 $\bar p + \text{Au}$ 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.

hep-ph↗

arXiv2017

Charmonium spectral functions in $\bar p A$ collision

We study the in-medium propagation of low-lying charmonium states: $J/Ψ$, $Ψ$(3686), and $Ψ$(3770) in a $\bar p$ Au $10$ GeV collision. This energy regime will be available for the PANDA experiment. The time evolution of the spectral functions of the charmonium states is studied with a BUU type transport model. We observe a substantial effect of the medium in the dilepton spectrum.

nucl-th↗