Centrality dependence of heavy flavor production from single electron measurement in Au +Au collisions

2005/11/01 by J. Bielcik, J. Bielčík · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-ex

paper · pdf · doi:10.1016/j.nuclphysa.2006.06.117

published as Nucl.Phys.A774:697-700,2006 · 4 pages, 3 figures, presented in Quark Matter 2005 in Budapest

arxiv created 2005/11/01 · openalex publication_date 2006/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We present preliminary measurements of electron production in p+p, d+Au, and Au+Au collisions at √s_NN=200 GeV for transverse momenta 1.5 GeV/c <p_T<8 GeV/c as a function of centrality. These measurements were carried out using the STAR Time Projection Chamber and Barrel Electromagnetic Calorimeter. In this manuscript we describe the measurement techniques used to discriminate electrons from hadrons and the method used to evaluate the non-photonic contributions from semi-leptonic decays of heavy flavor mesons. The observed nuclear modification factors, R_AA, of non-photonic electrons indicate at substantial energy loss of heavy quarks at moderate to high p_T.

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