Source breakup dynamics in Au+Au collisions at √sNN=200 GeV via three-dimensional two-pion source imaging
Source breakup dynamics in Au+Au collisions at √sNN=200 GeV via three-dimensional two-pion source imaging
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DOI：
10.1103/physrevlett.100.232301
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发表时间：
2008-06-13
影响因子：
8.6
通讯作者：
Zolin, L.
中科院分区：
文献类型：
--
作者：
Afanasiev, S.;Aidala, C.;Zolin, L.
研究了根 s(NN) = 200 GeV 中心 Au+Au 碰撞中的中速、低 p(T)、π 介子对获得的三维相关函数。提取的与模型无关的源函数表明在π介子对横向动量（向外）和梁（长）方向上存在长程尾部。需要类似于 9 fm/c 的适当分解时间 tau(0) 和类似于 2 fm/c 的平均适当发射持续时间 Delta tau，导致相当大的发射时间差异（大约 12 fm/c），以便模型能够成功匹配这些尾部。模型比较还表明排放源由外向内“燃烧”，让人想起许多流体动力学模型。
A three-dimensional correlation function obtained from midrapidity, low p(T), pion pairs in central Au+Au collisions at root s(NN) = 200 GeV is studied. The extracted model-independent source function indicates a long range tail in the directions of the pion pair transverse momentum (out) and the beam (long). A proper breakup time tau(0) similar to 9 fm/c and a mean proper emission duration Delta tau similar to 2 fm/c, leading to sizable emission time differences ( approximate to 12 fm/c), are required to allow models to be successfully matched to these tails. The model comparisons also suggest an outside-in "burning" of the emission source reminiscent of many hydrodynamical models.