Speaker
Xiaozhi Bai
(University of Illinois at Chicago)
Description
Heavy flavor quarks are suggested as excellent probes to study the strongly interacting Quark-Gluon Plasma (QGP) discovered in high-energy heavy-ion collisions. Measurements of heavy flavor production will advance our understanding of the properties of the QGP. Studies in different heavy-ion collision systems and centralities, and separately for charm and bottom quarks can provide new insights in how partons interact with the
QGP, and QGP evolution and dynamics. In this talk, we will present the most recent results on Non-Photonic Electron (NPE) production from semi-leptonic decays of open heavy flavor hadrons with the STAR experiment at the Relativistic Heavy Ion Collider. We will first report updated results on NPE production in p+p collsions at $\sqrt{s}$= 200 GeV with much improved precision and wider kinematic coverage than previous ones. These results are instrumental to test the validity of perturbative QCD calculations, and provide precise references for heavy-ion collisions. Calculations suggest that a 20% higher Bjorken energy density may be reached in U+U collisions, which can lead to a stronger suppression for NPE production. We will also report new results on the nuclear modification factor, $R_{AA}$, for NPE production in the 0-5% most central U+U collisions at $\sqrt{s_{NN}}$=193 GeV and compare with those in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. Finally we will report the most recent development in measurements of NPE from open bottom and charm hadron decays separately, utilizing the new Heavy Flavor Tracker of the STAR experiment.
| On behalf of collaboration: | STAR |
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Author
Xiaozhi Bai
(University of Illinois at Chicago)
