Proceedings for International Conference on Particles and Nuclei (PANIC 14) are on arXiv: http://arxiv.org/abs/1410.8037 and at Journal of Physics: Conference Series

Abstract:
We present the search results for muonic atoms on √sNN=200 GeV Au+Au collisions collected by the STAR experiment at RHIC. With the muon identification at low momentum, the invariant mass spectra were reconstructed. Clear signals are observed at the expected atom masses. Two particle correlations show that the production of the daughter particles happens at the same space-time point, presenting the signature of atom ionization. The fraction of primordial muons is extracted from π-μ correlations.