Measurements of non-photonic electrons with the STAR experiment

TL;DR

This paper reports measurements of non-photonic electrons in proton-proton and gold-gold collisions at RHIC, providing insights into heavy quark production, medium effects, and testing perturbative QCD predictions.

Contribution

It presents new measurements of NPE spectra, nuclear modification factor, and elliptic flow in p+p and Au+Au collisions at 200 GeV, advancing understanding of heavy quark behavior in hot dense matter.

Findings

NPE spectra measured in p+p collisions at 200 GeV.

NPE nuclear modification factor $R_{AA}$ in Au+Au collisions.

Elliptic flow $v_2$ of NPE in Au+Au collisions.

Abstract

Non-photonic electrons (NPE), produced by semileptonic decays of D and B mesons, are good probes to study the properties of hot and dense medium created in relativistic heavy ion collisions at RHIC. Studies of heavy quark production in p+p collisions can test the validity of perturbative QCD. They also provide a baseline to study the effects of nuclear matter on the production of heavy quarks in heavy ion collisions. In this paper, we present recent results of NPE spectra measured in p+p collisions at $\sqrt{s}=200$ GeV in mid-rapidity. We also report NPE nuclear modification factor $R_{AA}$ and elliptic flow $v_2$ in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV.