Beam energy and system dependence of rapidity-even dipolar flow

N. Magdy
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引用次数: 1

Abstract

New measurements of rapidity-even dipolar flow, v$^{even}_{1}$, are presented for several transverse momenta, $p_T$, and centrality intervals in Au+Au collisions at $\sqrt{s_{NN}}~=~200,~39$ and $19.6$ GeV, U+U collisions at $\sqrt{s_{NN}}~=~193$ GeV, and Cu+Au, Cu+Cu, d+Au and p+Au collisions at $\sqrt{s_{NN}}~=~200$~GeV. The v$^{even}_{1}$ shows characteristic dependencies on $p_{T}$, centrality, collision system and $\sqrt{s_{_{NN}}}$, consistent with the expectation from a hydrodynamic-like expansion to the dipolar fluctuation in the initial state. These measurements could serve as constraints to distinguish between different initial-state models, and aid a more reliable extraction of the specific viscosity $\eta/s$.
快速偶极流的束流能量与系统依赖关系
在$\sqrt{s_{NN}}~=~200,~39$和$19.6$ GeV, $\sqrt{s_{NN}}~=~193$ GeV, $\sqrt{s_{NN}}~=~200$~GeV, $\sqrt{s_{NN}}~=~200$~GeV, $\sqrt{s_{NN}}, Cu+Au, Cu+Cu, d+Au和p+Au碰撞中,给出了快速偶极流v$^{even}_{1}$的几个横向动量,$p_T$和中心性区间。v$^{偶数}_{1}$对$p_{T}$、中心性、碰撞系统和$\sqrt{s_{_{NN}} $表现出特征依赖关系,这与从类流体力学展开到初始态偶极涨落的期望一致。这些测量可以作为区分不同初始状态模型的约束条件,并有助于更可靠地提取特定粘度$\eta/s$。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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