# Mass shift of charmonium states in p¯A collision

György Wolf, Gábor Balassa, Péter Kovács, Miklós Zétényi, Su Houng Lee

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

## Abstract

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.

Original language English 25-28 4 Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 780 https://doi.org/10.1016/j.physletb.2018.02.056 Published - 2018 May 10

### Bibliographical note

Funding Information:
Gy. W., M. Z., G. B., and P. K. were supported by the Hungarian OTKA fund K109462 and Gy. W., M. Z. and P. K. by the HIC for FAIR Guest Funds of the Goethe University Frankfurt. P. K. and M. Z. also acknowledge support from the ExtreMe Matter Institute EMMI at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany. The work of SHL was supported by the Korea National Research Foundation under the grant number 2016R1D1A1B03930089 .
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