在 sqrt[s(NN)]=200 GeV 的 Au+Au 碰撞中测量 J/ψ 的各向异性。

Measurement of J/ψ azimuthal anisotropy in Au+Au collisions at sqrt[s(NN)]=200 GeV.

机构信息

AGH University of Science and Technology, Cracow, Poland.

出版信息

Phys Rev Lett. 2013 Aug 2;111(5):052301. doi: 10.1103/PhysRevLett.111.052301.

DOI:10.1103/PhysRevLett.111.052301

Abstract

The measurement of J/ψ azimuthal anisotropy is presented as a function of transverse momentum for different centralities in Au+Au collisions at sqrt[s(NN)]=200 GeV. The measured J/ψ elliptic flow is consistent with zero within errors for transverse momentum between 2 and 10 GeV/c. Our measurement suggests that J/ψ particles with relatively large transverse momenta are not dominantly produced by coalescence from thermalized charm quarks, when comparing to model calculations.

摘要

呈现了在 sqrt[s(NN)]=200 GeV 能量下 Au+Au 碰撞不同中心度事件中，测量到的 J/ψ 方位各向异性随横动量的函数分布。在 2 到 10 GeV/c 的横动量范围内，测量到的 J/ψ 椭圆流与零值符合，误差在允许范围内。与模型计算相比，我们的测量结果表明，对于具有较大横动量的 J/ψ 粒子，它们不是主要通过热化的粲夸克的合并产生的。