Among the heavy ion experiments . the minimum value is observed in c - cu collision . but the low multiplicity of this experiment and the vague intermittency in nuclear - nuclear collisions result in large error when the analysed rank of a , is high 虽然重离子碰撞c - cu中看到了_ q出现极小值的现象,但核核碰撞中间歇不明显,该实验中多重数较低,这些都导致对_ q的分析阶数较高时,误差已很大,结果的有效性需检验。
Together with the rapid progress of relativistic nucleon - nucleon collisions , many phenomenological models were built up and hope that those models can give reasonable explanation of the existed experimental results and give reasonable prediction for the forthcoming experiments 在相对论性核一核碰撞实验迅速发展的同时,许多唯象理论模型也相继建立,通过模拟计算,以期给实验结果以合理的物理解释,并对将来的实验作出预言。
Using rqmd to generate 80 , 000 monte carlo mini - bias events of 197au + 197 au collisions at snn = 200gev , we study the transverse momentum distribution , particle ratios and the freeze - out time and transverse radius distributions of final state hadronic system , comparing them with the reported experimental results 通过研究末态强子的横动量分布以及粒子比,特别是对带电、 k 、 p和( ? )的平均横动量的研究及与实验比较,我们试图研究在高能核碰撞中早期部分子集体行为。
Even if qgp is formed , it can just exist for a very short period of time and then decays into final state hadrons at the end of the expansion and the cooling of the system . the initial state information may be damaged by the final state interactions during the evolution process 在相对论性核?核碰撞中,即使qgp已形成了,也只是在碰撞过程的极短瞬间存在,随着系统的膨胀与冷却,它很快就演化为实验观测到的各种末态粒子,最初存在的信息也可能在演化过程中由于各种末态相互作用而变得不清晰了。
The model reproduced the following facts of wa97 experimental data : the yield of strange particles increases with increasing mass and increasing centrality of the colliding system , and also with increasing strangeness content of hyperons in relativis - tic nucleus - nucleus collisions . the simulation of strangeness production using luc1ae model shows that strangeness production is related not only to the rescattering . but also to the collective interaction among strings in relativistic nucleus - nucleus collisions Luciae模型能很好地描写wa97发表的单奇异和多奇异重子的产额和横质量分布的实验数据,能较好描写wa97实验所揭示的相对论性核-核碰撞中奇异粒子产额随碰撞体系质量、中心度的增大而增加和奇异粒子增强随奇异粒子所含奇异夸克数的增加而增强的实验事实。