Abstract
The PHENIX Collaboration at the Relativistic Heavy Ion Collider has measured open-heavy-flavor production in collisions at GeV through the measurement of electrons at midrapidity that originate from semileptonic decays of charm and bottom hadrons. In peripheral collisions an enhanced production of electrons is observed relative to collisions scaled by the number of binary collisions. In the transverse momentum range from 1 to 5 GeV/ the nuclear modification factor is . As the system size increases to more central collisions, the enhancement gradually disappears and turns into a suppression. For GeV/, the suppression reaches in the most central collisions. The and centrality dependence of in collisions agree quantitatively with in and collisions, if compared at a similar number of participating nucleons .
5 More- Received 31 October 2013
- Revised 19 July 2014
DOI:https://doi.org/10.1103/PhysRevC.90.034903
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