Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5494214 | Nuclear Physics A | 2016 | 4 Pages |
Abstract
We present the systematic study of dielectron production in U + U collisions at sNN=193Â GeV by Solenoidal Tracker At RHIC (STAR) experiment. Invariant mass, transverse momentum, and centrality differential measurements of dielectron yields are compared to Monte-Carlo hadronic contributions excluding Ï-meson. In each comparison, there is an excess in the Low Mass Region (LMR) that can be described by a model calculation including a broadened Ï spectral function. With detector acceptance correction applied, the dielectron excess invariant mass spectra in U + U collisions at sNN=193Â GeV and in Au + Au collisions at sNN=27,39, and 62.4 GeV are reported. System-size and energy dependences of low mass excess yield are discussed together with model comparisons.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Nuclear and High Energy Physics
Authors
Shuai Yang, STAR Collaboration STAR Collaboration,