Abstract
The contribution of meson decays to nonphotonic electrons, which are mainly produced by the semileptonic decays of heavy-flavor mesons, in collisions at has been measured using azimuthal correlations between nonphotonic electrons and hadrons. The extracted decay contribution is approximately 50% at a transverse momentum of . These measurements constrain the nuclear modification factor for electrons from and meson decays. The result indicates that meson production in heavy ion collisions is also suppressed at high .
- Received 7 July 2010
DOI:https://doi.org/10.1103/PhysRevLett.105.202301
© 2010 The American Physical Society