Abstract
The momentum distribution of electrons from semileptonic decays of charm and bottom quarks for midrapidity in collisions at is measured by the PHENIX experiment at the Relativistic Heavy Ion Collider over the transverse momentum range . The ratio of the yield of electrons from bottom to that from charm is presented. The ratio is determined using partial ( unidentified) reconstruction. It is found that the yield of electrons from bottom becomes significant above in . A fixed-order-plus-next-to-leading-log perturbative quantum chromodynamics calculation agrees with the data within the theoretical and experimental uncertainties. The extracted total bottom production cross section at this energy is .
- Received 29 March 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.082002
©2009 American Physical Society