Dileptons from the strongly-interacting Quark-Gluon Plasma within the Parton-Hadron-String-Dynamics (PHSD) approach

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• 作者：O. Linnyk ; E.L. Bratkovskaya ; W. Cassing
• 刊名：Nuclear Physics A
• 出版年：2009
• 出版时间：1 November 2009
• 年：2009
• 卷：830
• 期：1-4
• 页码：491c-494c
• 全文大小：466 K

文摘

Dilepton production in In+In collisions at is studied within the microscopic Parton-Hadron-Strings Dynamics (PHSD) transport approach, which is based on a dynamical quasiparticle model (DQPM) matched to reproduce lattice QCD results in thermodynamic equilibrium. A comparison to the data of the NA60 Collaboration shows that the low mass dilepton spectra are well described by including a collisional broadening of vector mesons, while the spectra in the intermediate mass range are dominated by off-shell quark-antiquark annihilation in the nonperturbative QGP. In particular, the observed softening of the m_T spectra at intermediate masses is reproduced.