Dimuonium $(\mu^+\mu^-)$ Production in a Quark-Gluon Plasma
  We study dimuonium $(\mu^+\mu^-)$ production in the quark-gluon plasma created in relativistic heavy ion collisions. The production is controlled by the process $q\bar q\rightarrow (\mu^+\mu^-)g$, and the dimuonium motion in the plasma is described by a transport equation. While the electrodynamics dominated dimuonium yield is not high enough, the transverse energy distribution carries the information of the plasma at RHIC and LHC energies. 
Yibiao Chen and Pengfei Zhuang
hep-ph nucl-th