Measurements of Open Heavy Flavor Production in Semi-leptonic Decay Channels at the STAR experiment

Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions 2016

Zhang, Shenghui^1

University of Science and Technology of China (USTC), University of Illinois at Chicago (UIC), United States^1

关键词: Au+Au collisions;    Heavy flavor production;    Leptonic decay;    Measurements of;    Nuclear modification factors;    STAR experiment;    Systematic uncertainties;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/832/1/012032/pdf
DOI  :  10.1088/1742-6596/832/1/012032

来源: IOP

【 摘 要 】

In these proceedings, we will present the new results of the Non-Photonic Electron (NPE) production from semi-leptonic decays of open heavy avor hadrons at the STAR experiment. Firstly we will report the updated results on NPE production in p+p collisions at √ sNN = 200 GeV with much improved precision and wider kinematic coverage than previous measurements. Secondly we will report measurements of the nuclear modification factor, RAA, for NPE production in Au+Au collisions at √ sNN = 200 GeV with this new p+p reference. The NPE RAAshows large suppression at high transverse momenta (pT) in central collisions, which reduces gradually towards more peripheral collisions, and an enhancement at low pT with large systematic uncertainties from the p+p reference. We will compare NPE RAAto the RAAof charm decayed electrons, D0mesons and light hadrons in Au+Au collisions as well as to NPE and D0mesons in central U+U collisions and show that they are all consistent within the uncertainties. Finally we will report the results on measurements of NPE from open bottom hadron decays and discuss the prospect of measuring NPE from open bottom and charm hadron decays separately utilizing the Heavy Flavor Tracker.