Single electron yields from semileptonic charm and bottom hadron decays in Au+Au collisions at √sNN=200 GeV

Adare, A. and Makek, Mihael and Zou, L. (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). pp. 34904-29. ISSN 2469-9985

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Abstract

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>4GeV/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<4GeV/c.

Item Type: Article
Keywords: QGP, Heavy flavor, single electrons, 200 GeV, PHENIX, VTX
Date: March 2016
Subjects: NATURAL SCIENCES > Physics
Additional Information: ©2016 American Physical Society. Received 5 October 2015; published 7 March 2016.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 21 Apr 2016 15:52
Last Modified: 21 Apr 2016 15:52
URI: http://digre.pmf.unizg.hr/id/eprint/4783

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