Measurements of DS±-meson production in Au plus Au collisions at √sNN=200 GeV in STAR

被引：2
|
作者：
Nasim, Md. [1 ]
机构：
[1] Univ Calif Los Angeles, Los Angeles, CA 90095 USA
来源：
NUCLEAR PHYSICS A | 2016年 / 956卷
关键词：
strangeness; charm; quark-gluon plasma; HERA;
D O I：
10.1016/j.nuclphysa.2016.02.058
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We present the first measurement of the nuclear modification factor R-AA and elliptic flow v(2) of D-s in Au+Au collisions at root(NN)-N-s = 200 GeV with the STAR detector. These results have been compared with those of other open charm mesons and strange mesons to determine how the (possibly) strangeness equilibrated partonic matter affects the D-s meson production. We find that the nuclear modification factor of D-s are systematically higher than unity and that of D-0. The ratio D-s/D-0 is shown as a function of transverse momentum for the 10-40% most central Au+Au collisions and compared with that in p + p collisions obtained from PYTHIA. It is also compared with that in Pb+Pb collisions at 2.76 TeV by the ALICE experiment. Our measurement indicates a hint of enhancement of D-s production in Au+Au collisions with respect to p + p collisions as compared to non-strange D mesons.
引用
收藏
页码：509 / 512
页数：4
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