Electromagnetic probes of the quark‐gluon plasma. Issue 1 (28th March 2019)

• Record Type: Journal Article
• Authors: Song, T.; Bratkovskaya, E.; Cassing, W.; Moreau, P.
• Other Names: Zen Vasconcellos C. A. guestEditor.; Solano J. guestEditor.; Horvath J. guestEditor.; Machado M. guestEditor.; Gamarra M. guestEditor.; Razeira M. guestEditor.; Hess P. guestEditor.; González Felipe R. guestEditor.; Boller Th. guestEditor.
• Is Part Of: Astronomische Nachrichten. Volume 340:Issue 1/3(2019)
• Page Start: 157
• Page End: 162
• Publication Date: 2019-03-28
• Subjects: heavy ions -- quark–gluon plasma -- transport models; Astronomy -- Periodicals; 520.5
• DOI: 10.1002/asna.201913580
• Languages: English
• ISSNs: 0004-6337

Abstract

Abstract : In this paper, we investigate dilepton production in heavy‐ion collisions from s NN = 8 to 200 GeV with a focus on the competition between the thermal quark‐gluon plasma (QGP) radiation and the semi‐leptonic decays from correlated D‐meson pairs. As a "tool, " we employ the parton–hadron string dynamics (PHSD) transport approach incorporating a fully microscopic treatment of the charm dynamics and their semi‐leptonic decays. We find that the dileptons from correlated D‐meson decays dominate the "thermal" radiation from the QGP in central Pb + Pb collisions at the intermediate masses (1.2 GeV < M < 3 GeV) for s NN > 40 GeV, while for s NN = 5 − 20 GeV, the contribution from D, D ‾ decays to the intermediate mass dilepton spectra is subleading such that one should observe a rather clear signal from the QGP radiation, which is dominated by the annihilation channel q q ‾ → γ * .