Abstract
The energy loss of heavy quarks in the hot and dense matter created in high‐energy nuclear collisions at RHIC, can be used to probe the properties of the medium. Both charm and beauty quarks contribute to the non‐photonic electrons through their semi‐leptonic decays. It is essential to determine experimentally the relative contributions of charm and beauty quarks to understand the observed suppression of non‐photonic electrons at high pT in central Au+Au collisions. The azimuthal angular correlations of non‐photonic electrons with hadrons as well as with the reconstructed D0 allow to disentangle the contributions of charm and beauty to the electron spectrum. We discuss the STAR measurement of non‐photonic electron‐D0 and non‐photonic electron‐hadron azimuthal correlations in p+p collisions at 200 GeV and explore the consequences for the heavy flavour suppression in heavy ion collisions at RHIC.
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