Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session L15: Mini-Symposium on Hard Probes in Heavy Ion Collisions II
3:30 PM–5:18 PM,
Sunday, April 14, 2019
Sheraton
Room: Plaza Court 4
Sponsoring
Unit:
DNP
Chair: J Matthew Durham, Los Alamos National Laboratory
Abstract: L15.00003 : Measurements of D± and D*± production in Au+Au collisions at √sNN = 200 GeV from STAR
4:18 PM–4:30 PM
View Presentation Abstract
Presenter:
Xinyue Ju
(University of Science and Technology of China, Lawrence Berkeley National Laboratory)
Author:
Xinyue Ju
(University of Science and Technology of China, Lawrence Berkeley National Laboratory)
Collaboration:
STAR Collaboration
Charm quarks, owing to their large mass, are predominantly created through initial hard scatterings in relativistic heavy-ion collisions and thus are ideal probes to study the properties of Quark-Gluon Plasma (QGP) produced in these collisions. Thanks to high-precision vertex reconstruction provided by the Heavy Flavor Tracker detector, STAR experiment has been able to perform comprehensive measurements of D0 meson production. The results indicate that charm quarks lose energy and gain significant collectivity when traversing through the QGP medium. Measurements of D± and D*± production are complementary to D0 in studying the charm quark interaction with the medium. Also, potential hot medium effects can shorten the lifetime of D*± and can lead to a modification of the measured D*±/D0 yield ratio in heavy-ion collisions, compared to that in p+p collisions.
In this presentation, we report measurements of the production of D± and D*± mesons in Au+Au collisions at √sNN = 200 GeV. The invariant yields are measured at mid-rapidity as a function of transverse momentum pT in different centralities. The nuclear modification factors of D± and the yield ratios of D*±/D0 and D±/D0 as a function of pT and collision centrality are also presented and their physics implications are discussed.
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