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

Abstract

In these proceedings, we will present the new results of the Non-Photonic Electron (NPE) production from semi-leptonic decays of open heavy flavor hadrons at the STAR experiment. Firstly we will report the updated results on NPE production in p+p collisions at 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 with this new p+p reference. The NPE RAA shows 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 RAA to the RAA of charm decayed electrons, D0 mesons and light hadrons in Au+Au collisions as well as to NPE and D0 mesons 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.