Single electron yields from semileptonic charm and bottom hadron decays in Au+Au collisions at √sNN = 200 GeV
PHENIX Collaboration. (2016). Single electron yields from semileptonic charm and bottom hadron decays in Au+Au collisions at √sNN = 200 GeV. Physical Review C, 93(3), Article 034904. https://doi.org/10.1103/PhysRevC.93.034904
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Physical Review CAuthors
Date
2016Copyright
© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
The PHENIX Collaboration at the Relativistic Heavy Ion Collider has measured open heavy flavor production
in minimum bias Au + Au collisions at √sNN = 200 GeV via the yields of electrons from semileptonic decays
of charm and bottom hadrons. Previous heavy flavor electron measurements indicated substantial modification
in the momentum distribution of the parent heavy quarks owing to the quark-gluon plasma created in these
collisions. For the first time, using the PHENIX silicon vertex detector to measure precision displaced tracking,
the relative contributions from charm and bottom hadrons to these electrons as a function of transverse momentum
are measured in Au + Au collisions. We compare the fraction of electrons from bottom hadrons to previously
published results extracted from electron-hadron correlations in p + p collisions at √sNN = 200 GeV and find
the fractions to be similar within the large uncertainties on both measurements for pT > 4 GeV/c. We use the
bottom electron fractions in Au + Au and p + p along with the previously measured heavy flavor electron RAA
to calculate the RAA for electrons from charm and bottom hadron decays separately. We find that electrons from
bottom hadron decays are less suppressed than those from charm for the region 3 < pT < 4 GeV/c.
...


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