Search for muonic atoms at RHIC

Hot Quarks 2014: Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions

Xin, Kefeng^1

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;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/612/1/012032/pdf
DOI  :  10.1088/1742-6596/612/1/012032

来源: IOP

【 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.