Charm and Beauty Separation from Heavy Flavor Electron Measurements at RHIC

Heavy quarks (charm and beauty), especially beauty, with expectedly different properties from light quarks are considered as ideal probes for the Quark-Gluon Plasma (QGP). However, there are few measurements on beauty hadrons or on their decay leptons. With the most recent measurements on charmed hadrons and heavy flavor decay electrons (HFE) at mid-rapidity in Au+Au collisions at \sqrts_\rm NN=200\;\rmGeV at RHIC, a data-driven method is developed to separate charm and beauty components from the HFE measurements. From charmed hadron measurements, electrons from charm decays via semileptonic decay simulations are obtained, with which the beauty component can be extracted from the HFE spectrum. As preliminary results, the p^_\rm T spectra, R_\rm AA and v_2 distributions of electrons from charm and from beauty decays (R_\rm AA^\rm c\rightarrow e and v_2^\rm c\rightarrow e, R_\rm AA^\rm b\rightarrow e and v_2^\rm b\rightarrow e) in minimum bias Au+Au collisions are presented, respectively. Less suppression of R_\rm AA^\rm b\rightarrow e is observed compared with that of R_\rm AA^\rm c\rightarrow e at moderate-to-high p_\rm T, and v_2^\rm b\rightarrow e shows smaller than v_2^\rm c\rightarrow e at low-to-moderate p_\rm T.