2006/06/05 by J. Bielčík, Bielcik, Jaroslav
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.nucl-ex/0606010
openalex publication_date 2006/06/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In these proceedings, heavy flavor production as measured by STAR is disscussed. This can be done directly by reconstruction of the hadronic decays or indirectly by the measurement of electrons from semileptonic decays of heavy quark mesons. The extracted charm production total cross-section per nucleon-nucleon collision in d+Au and Au+Au collisions shows binary scaling, supporting the idea that charm quarks are produced in hard scattering in the initial phase of the collision. The preliminary non-photonic electron spectra from p+p, d+Au and Au+Au collisions at √sNN=200 GeV at mid-rapidity are presented. The momentum range of reconstructed non-photonic electrons is 1.5 < pT< 10 GeV/c. The dominant contribution to the non-photonic electron spectrum is the semi-leptonic decay of D and B mesons. The electron nuclear modification factor (RAA) shows a large suppression in central Au+Au collisions, indicating an unexpectedly large energy loss for heavy quarks in the hot and dense matter created at RHIC. Theoretical models tend to overpredict the data if the contributions from both charm and beauty decays are taken into account.