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arXiv 0902.4121nucl-th
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相对论性重离子碰撞中的快速流体力学膨胀

Rapid hydrodynamic expansion in relativistic heavy-ion collisions

Piotr Bozek, Iwona Wyskiel

摘要:

本文研究了200 GeV相对论Au-Au碰撞中产生的3+1维热火球的流体动力学膨胀。对于不同的碰撞中心和不同的速度,我们得到了同时的,令人满意的描述的横向动量谱,椭圆流和π相关半径。早期的初始时间的演变是需要复制的干涉测量数据,这提供了一个强有力的迹象,集体的早期发病。我们还可以在光束方向上约束初始能量密度的形状,在火球的中心具有相对高的初始能量密度。

英文摘要:

Hydrodynamic expansion of the hot fireball created in relativistic Au-Au collisions at 200GeV in 3+1-dimensions is studied. We obtain a simultaneous, satisfactory description of the transverse momentum spectra, elliptic flow and pion correlation radii for different collision centralities and different rapidities. Early initial time of the evolution is required to reproduce the interferometry data, which provides a strong indication of the early onset of collectivity. We can also constraint the shape of the initial energy density in the beam direction, with a relatively high initial energy density at the center of the fireball.

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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