The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has measured electrons with 0.3

At sufficiently high temperatures and densities quarks and gluons exist in a deconfined state called Quark Gluon Plasma (QGP).

There are several indications that an opaque partonic medium is created in energetic Au+Au collisions ({radical}s{sub NN} {approx} GeV/nucleon) at the Relativistic Heavy Ion Collider (RHIC).

Au+Au collisions at [square root of] [superscript]s nn = 130 and 200 GeV at the Relativistic Heavy Ion Collider have opened a new energy regime for studying nucleus-nucleus collisions.

Simone Schuchmann. 15. P.B. Gossiaux et al., Gluon radiation by heavy quarks at intermediate energies and consequences for the mass hierarchy of energy loss ... collisions at √ sNN 2.76 TeV. Phys. Rev. C 88, 044910 (2013). doi:10.1103 ...

Heavy flavor quarks are produced early in heavy ion collisions and will experience the full evolution of the Quark Gluon Plasma (QGP).

In addition, it also touched the important problem of hadronization process in high-energy collisions. Therefore a systematic study with different approaches becomes necessary.

In this study, we present measurements of electrons and positrons from the semileptonic decays of heavy-flavor hadrons at midrapidity (