首页> 外文期刊>Nuclear Physics, A: Journal Devoted to the Experimental Study of the Fundamental Constituents of Matter and Their Actions >Measurements of directed and elliptic flow for D-0 and (D-0)over bar mesons using the STAR detector at RHIC
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Measurements of directed and elliptic flow for D-0 and (D-0)over bar mesons using the STAR detector at RHIC

机译:对D-0的指向和椭圆形流量的测量和<(D-0)上方的条形和GT; 在Rhir中使用星探测器的助理

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摘要

We report on the first evidence for a non-zero rapidity-odd directed flow (nu(1)) for D-0 and (D-0) over bar mesons in 10-80% centrality Au+Au collisions at root S-NN = 200 GeV measured with the STAR detector at RHIC. The slope of the v1 rapidity dependence (d nu(1)/dy) averaged over D-0 and (D-0) over bar mesons is -0.081 +/- 0.021 +/- 0.017, while that of charged kaons is -0.0030 +/- 0.0001 +/- 0.0002, suggesting significantly larger slope for the D-0 mesons. Models indicate that the large d nu(1)/dy of D-0 mesons is sensitive to the initially tilted source. We also present a new measurement of the D-0 meson elliptic flow (v(2)) as a function of transverse momentum (P-T) in Au+Au collisions at root S-NN = 200 GeV with an improved precision with respect to the previously published results. The D-0 nu(2) results are compared to those of light-flavor hadrons to test the number-of-constituent-quark (NCQ) scaling. Both the nu(1) and nu(2) results are compared to recent hydrodynamic and transport model calculations.
机译:我们在10-80%Centrality Au + Au碰撞中向D-0和(D-0)在Root S-Nn的碰撞中的非零快速 - 奇数定向流(Nu(1))的第一个证据报告了D-0和(D-0)的第一个证据=在RAC的星形探测器测量200 GEV。 V1快速依赖性的斜率(D Nu(1)/ Dy)在D-0和(D-0)上方的条形秒为-0.081 +/- 0.021 +/- 0.017,而带电的KOON是-0.0030 +/- 0.0001 +/- 0.0002,暗示D-0秒的斜率明显更大。模型表明D-0 Mesons的大D Nu(1)/ Dy对最初倾斜的源敏感。我们还提出了D-0 Meson椭圆形流(V(2))的新测量,作为横向动量(Pt)的横向动量(Pt)在根S-NN = 200 GEV的碰撞中,具有改进的精度相对于以前发表的结果。将D-0 Nu(2)结果与光味强度的结果进行比较,以测试构成夸克(NCQ)缩放。将Nu(1)和Nu(2)结果与最近的流体动力学和运输模型计算进行比较。

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