Measurement of D0 Meson Production and Azimuthal Anisotropy in Au plus Au Collisions at √SNN=200 GeV

被引：3
|
作者：
Xie, Guannan [1 ]
机构：
[1] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
来源：
NUCLEAR AND PARTICLE PHYSICS PROCEEDINGS | 2017年 / 289卷
关键词：
Quark-gluon plasma; Nuclear modification factor; Elliptic flow; Heavy Flavor Tracker;
D O I：
10.1016/j.nuclphysbps.2017.05.046
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Due to the large masses, heavy-flavor quarks are dominantly produced in initial hard scattering processes and experience the whole evolution of the medium produced in heavy-ion collisions at RHIC energies. They are also expected to thermalize slower than light-flavor quarks. Thus the measurement of heavy quark production and azimuthal anisotropy can provide important insights into the medium properties through their interactions with the medium. In these proceedings, we report measurements of D-0 production and elliptic flow (v(2)) via topological reconstruction using STAR's recently installed Heavy Flavor Tracker (HFT). The new measurement of the nuclear modification factor (R-AA) of D-0 mesons in central Au+Au collisions at root(NN)-N-S = 200 GeV confirms the strong suppression at high transverse momenta (pT) reported in the previous publication with much improved precision. We also report the measurement of elliptic flow for D-0 mesons in a wide transverse momentum range in 0-80% minimum-bias Au+Au collisions. The D-0 elliptic flow is finite for pT > 2 GeV/c and is systematically below that of light hadrons in the same centrality interval. Furthermore, several theoretical calculations are compared to both RAA and v2 measurements, and the charm quark diffusion coefficient is inferred to be between 2 and similar to 12.
引用
收藏
页码：209 / 212
页数：4
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