Event-by-event fluctuations in particle multiplicities and transverse energy produced in 158 A GeV Pb+Pb collisions
Event-by-event fluctuations in particle multiplicities and transverse energy produced in 158 A GeV Pb+Pb collisions
复制标题
158 A GeV Pb Pb 碰撞中产生的粒子多重性和横向能量的逐事件波动
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
E. al.
中科院分区：
文献类型：
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作者：
M. Aggarwal;E. al.
本文研究了158A GeV Pb+Pb碰撞中带电粒子和光子的多重数以及总横向能量随事件的涨落。对于狭窄的中心性箱的多重性和横向能量分布被发现是接近完美的高斯。已经研究了探测器接受度对多重性波动的影响，并证明了遵循统计考虑。带电粒子多重性波动的测量数据中的中心依赖性已被发现同意合理以及从参与者模型获得的。然而，对于光子的多重性波动已被发现是较低的相比，从参与者模型获得的。多重性和横向能量波动也进行了比较，从金星事件发生器获得的。
Event-by-event fluctuations in the multiplicities of charged particles and photons, and the total transverse energy in 158A GeV Pb+Pb collisions are studied for a wide range of centralities. For narrow centrality bins the multiplicity and transverse energy distributions are found to be near perfect Gaussians. The effect of detector acceptance on the multiplicity fluctuations has been studied and demonstrated to follow statistical considerations. The centrality dependence of the charged particle multiplicity fluctuations in the measured data has been found to agree reasonably well with those obtained from a participant model. However, for photons the multiplicity fluctuations have been found to be lower compared to those obtained from a participant model. The multiplicity and transverse energy fluctuations have also been compared to those obtained from the VENUS event generator.