arXiv 1210.46072012-10-17nucl-ex

在$\sqrt{s_{NN}}=$ 7.7 - 62.4的Au+Au碰撞中的事件各向异性$v_{2}$ GeV与STAR

Event anisotropy $v_{2}$ in Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7 - 62.4 GeV with STAR

Shusu Shi

备注：: 4 pages, 3 figures, Quark Matter 2012 proceedings
发表信息：: Nucl.Phys. A904-905 (2013) 895C-898C
DOI：: 10.1016/j.nuclphysa.2013.02.159

摘要：

本文报道了在$\sqrt{s_{NN}}=$ 7.7，11.5，19.6，27，39和62.4 GeV的Au+Au碰撞中，对包含的带电强子和已识别的强子的中快度$v_2$测量（$π^{\pm}$、$K^{\pm}$、$K_{S}^{0}$、$p$、$\bar{p}$、$ϕ$、$Λ$、$\barΛ$、$Ξ^{-}$、$\barΞ^{+}$、$Ω^{-}$、$\barΩ^{+}$）高达4 GeV/ $c$在$p_{T}$。给出了带电强子$v_2$的束流能量和中心性依赖关系，并与RHIC和LHC的高能强子作了比较。利用已识别的强子$v_{2}$讨论了不同束流能量下的NCQ标度。对于$\sqrt{s_{NN}} <$ 39 GeV，在粒子和相应的反粒子之间观察到$v_{2}(p_{T})$的显著差异。与介子相比，重子的这些差异更明显，并且随着能量的降低而增加。

英文摘要：

We present the $v_2$ measurement at midrapidity from Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7, 11.5, 19.6, 27, 39 and 62.4 GeV for inclusive charged hadrons and identified hadrons ($π^{\pm}$, $K^{\pm}$, $K_{S}^{0}$, $p$, $\bar{p}$, $ϕ$, $Λ$, $\barΛ$, $Ξ^{-}$, $\barΞ^{+}$, $Ω^{-}$, $\barΩ^{+}$) up to 4 GeV/$c$ in $p_{T}$. The beam energy and centrality dependence of charged hadron $v_2$ are presented with comparison to higher energies at RHIC and LHC. The identified hadron $v_{2}$ are used to discuss the NCQ scaling for different beam energies. Significant difference in $v_{2}(p_{T})$ is observed between particles and corresponding anti-particles for $\sqrt{s_{NN}} <$ 39 GeV. These differences are more pronounced for baryons compared to mesons and they increase with decreasing energy.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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