Identify bottom contribution in non-photonic electron spectra and \vv\   from \AuAu collisions at RHIC
  We present a study on the spectra and elliptic flow v2 for heavy flavor (charm and bottom) decayed electrons provided the relative contributions of charm and bottom hadrons from the PYTHIA calculations. We made a simultaneous fit to both measured non-photonic electron spectra and v2 distributions. The results suggest that the bottom contribution is not dominant for electron pt<5 GeV/c in the 200 GeV Au+Au collisions. 
Y.Zhang, S.Esumi, H.Huang, Y.Miake, S.Sakai and N.Xu