The effect of “pre-formed” hadron potentials on the dynamics of heavy ion collisions and the HBT puzzle
The effect of “pre-formed” hadron potentials on the dynamics of heavy ion collisions and the HBT puzzle
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DOI：
10.1016/j.physletb.2007.11.080
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发表时间：
2007-09
影响因子：
4.4
通讯作者：
Qingfeng Li;M. Bleicher;H. Stoecker
中科院分区：
文献类型：
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作者：
Qingfeng Li;M. Bleicher;H. Stoecker
的核停止，椭圆流，HBT干涉计算的UrQMD传输模型，其中被认为是潜在的“预形成”的粒子（字符串碎片）从彩色磁通管破碎以及约束粒子。这种描述在早期阶段提供了更强的压力，并且比默认的级联模式更好地描述了这些可观测量（在默认的级联模式中，来自弦碎裂的“预形成”粒子被视为自由流）。应该强调的是，包括潜在的相互作用推低计算的HBT半径RO和拉高RS，HBT的时间相关的困惑消失在整个能量从AGS，SPS，RHIC。
The nuclear stopping, the elliptic flow, and the HBT interferometry are calculated by the UrQMD transport model, in which potentials for “pre-formed” particles (string fragments) from color fluxtube fragmentation as well as for confined particles are considered. This description provides stronger pressure at the early stage and describes these observables better than the default cascade mode (where the “pre-formed” particles from string fragmentation are treated to be free-streaming). It should be stressed that the inclusion of potential interactions pushes down the calculated HBT radius ROand pulls up the RSso that the HBT time-related puzzle disappears throughout the energies from AGS, SPS, to RHIC.