Search for muonic atoms at RHIC

[摘要] We report the search results of muonic atoms from the STAR experiment at RHIC. The invariant mass distributions of hadron-muon pairs show peaks at the expected atom masses. Two particle correlation functions indicate the hadrons and muons that are close in phase space are emitted at the same space time point, which is a possible signature of muonic atom ionization at the beam pipe. The pion-muon correlation functions are further decomposed into two contribsutions, and the fraction of direct muons is obtained.

[发布机构] Physics and Astronomy Department, Rice University, Houston; TX; 77005, United States^1

[关键词] Beam pipe;Correlation function;Invariant mass distribution;Muon pairs;Muonic atoms;Space time;STAR experiment;Two particle correlation