Journal article

Publication year: 2008

Pages: 1367-1439

Journal: International Journal of Modern Physics E

Volume number: 17

Issue number: 8

ISSN: 0218-3013

eISSN: 1793-6608

Open access status: Green

DOI Link: https://doi.org/10.1142/S0218301308010507

Publisher: World Scientific Publishing

Abstract: 
We review dynamical and thermal models for the collectivity and the suppression pattern of charmed mesons - produced in proton nucleus and nucleus-nucleus collisions at SPS (similar to 158 A GeV) and RHIC energies (similar to 21 A TeV). In particular, we examine the charmonium "melting" and the "comover dissociation" scenarios - implemented in a microscopic transport approach - in comparison to the available data from the SPS and RHIC. The analysis shows that the dynamics of c and c quarks. quarks at RHIC are dominated by partonic or "pre-hadronic" interactions in the strongly coupled plasma stage and can neither be modeled by "hadronic" interactions nor described appropriately by color screening alone. Both the "charmonium melting" and the hadronic "comover absorption and recreation model" are found, however, to be compatible with the experimental observation at SPS energies; the experimental ratio of psi'/J/psi, versus centrality clearly favors the "hadronic comover" scenario. We find that the collective flow of charm in the purely hadronic Hadron-String Dynamics (HSD) transport appears compatible with the data at SPS energies, but the data at top RHIC energies are substantially underestimated. Thus, the large elliptic flow nu(2) of D-mesons and the low R-AA((pT)) Of J/psi seen experimentally have to be attributed to early interactions of non-hadronic degrees of freedom. Simultaneously, we observe that non-hadronic interactions are mandatory in order to describe the narrowing of the J/psi, rapidity distribution from pp to central Au + Au collisions at the top RHIC energy of root s = 200 GeV. Additionally we demonstrate that the strong quenching of high-PT J/psi's in central Au + Au collisions indicates that a large fraction of final J/psi, mesons is created by a coalescence mechanism close to the phase boundary. Throughout this review we, furthermore, provide predictions for charm observables from Au + Au collisions at FAIR energies of 25-35 A GeV.

Harvard Citation style: Linnyk, O., Bratkovskaya, E. and Cassing, W. (2008) OPEN AND HIDDEN CHARM IN PROTON-NUCLEUS AND HEAVY-ION COLLISIONS, International Journal of Modern Physics E, 17(8), pp. 1367-1439. https://doi.org/10.1142/S0218301308010507

APA Citation style: Linnyk, O., Bratkovskaya, E., & Cassing, W. (2008). OPEN AND HIDDEN CHARM IN PROTON-NUCLEUS AND HEAVY-ION COLLISIONS. International Journal of Modern Physics E. 17(8), 1367-1439. https://doi.org/10.1142/S0218301308010507