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arXiv 0911.4556nucl-th
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$\sqrt{s}$ =6-200 GeV Pb+Pb和Au+Au碰撞中基于格点的物态方程和$ϕ$介子的产生

A lattice based equation of state and $ϕ$ meson production in $\sqrt{s}$=6-200 GeV Pb+Pb and Au+Au collisions

Victor Roy, A. K. Chaudhuri

摘要:

在一个助推不变的流体动力学模型中,我们分析了在质量中心能量范围$\sqrt{s}$ = 6-200 GeV的Pb+Pb和Au+Au碰撞中$ϕ$介子的产生.流体动力学演化由基于晶格的状态方程控制,在$T_{co}$ =196 MeV时具有约束-解约束{ \em交叉}。我们还寻找阈值能量以上的禁闭物质经历了解除禁闭过渡。分析表明,在阈值能量${\sqrt{s}}_{th}$ = $13.65 \pm 3.06$ GeV以上,流体介质从受限相跨越到非受限相。

英文摘要:

In a boost-invariant hydrodynamic model, we have analyzed $ϕ$ meson production in Pb+Pb and Au+Au collisions, in the centre of mass energy range $\sqrt{s}$= 6-200 GeV. Hydrodynamic evolution is governed by a lattice based equation of state with a confinement-deconfinement {\em cross over} at $T_{co}$=196 MeV. We also look for the threshold energy above which the confined matter undergoes a deconfinement transition. Analysis indicate that above a threshold energy, ${\sqrt{s}}_{th}$=$13.65 \pm 3.06$ GeV, the fluid medium crosses over from a confined phase to a deconfined phase.

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