PSEUDORAPIDITY DISTRIBUTIONS OF RELATIVISTIC SINGLY CHARGED PARTICLES IN HIGH ENERGY NUCLEUS-NUCLEUS COLLISIONS

The pseudorapidity distributions of relativistic singly charged part icles produced in high energy nucleus-nucleus collisions are described by the thermalized cylinder picture. The calculated results are in agreement with the recent experimental data of gold induced interactions at the Brookhaven National Laboratory.     

EVEN-ODD CHARGED MULTIPLICITY DISTRIBUTIONS AND ENERGY DEPENDENCE OF NORMALIZED MULTIPLICITY MOMENTS IN DIFERENT RAPIDITY WINDOWS

The even and odd multiplicity distributions for hadron-hadron collision in different rapidity windows are calculated,starting from a simple picture for charge correlation with nonzero correlation length.The coincidence and separation of these distributions are explained.The calculated window-and energy-dependence of normalized moments recover the behaviour found in experiments.A new definition for normalized moments is propossed,especially suitable for narrow rapidity windows.     

400GeV/c pp碰撞自仿射多重分形分析

利用分形来研究高能碰撞多粒子产生机制是新兴的交叉科学,而获取多粒子产生的多重分形谱对了解高能碰撞机制很重要.本文将改进的连续阶数阶乘矩方法应用于40 0GeV/cpp碰撞多重产生的自仿射分析中,首次得到了自仿射多重分形谱.     

Two-particle Pseudorapidity Correlations in pp Collisions at 400GeV/c

The pseudorapidity distributions of charged produced in pp collisions at 400GeV/c have been measured using LEBC films.Two-particle pseudorapidity correlations at fixed multiplicity have been studied.The experimental data was fitted by cluster model.It is found that the average cluster multiplicities as well as the cluster decay widths both vary slightly with charged multiplicity.     

400GeV/c pp碰撞中的非热相跃迁

利用CERNNA27合作组提供的LEBC泡室照片测量了400GeV/c pp碰撞产生的带电粒子赝快度分布.利用星形积分法计算标度阶乘矩F_q直至q=7.分析结果表明可能存在非热相跃迁和两种不同的多粒子产生方式.观察到涨落的多重分形结构支持粒子产生的随机级联模型.     

Production of Ring-like Events in pp Collisions at 400GeV/c

The production mechanism of ring-like events has been investigated by using the data of pseudorapidity distribution of charged particles produced in pp collisions at 400GeV/c. The results show that the model of coherent gluon emission within a finite region of space-time is a possible production mechanism of ring-like events, but certainly not dominant.     

400GeV/c pp碰撞间歇指数的测量

利用CERNNA27合作组提供的LEBC泡室照片对400GeV/c pp碰撞产生的带电粒子赝快度分布进行了测量.计算了标度阶乘矩.得出间歇指数随矩阶数的增加而增加,随平均多重数的增加而变小;反常分形维数dq随q的增加而增加.这表明在强子-强子碰撞中多粒子产生具有自相似级联的性质.     

400GeV/c pp碰撞类环事例的产生

利用400GeV/c pp碰撞产生的带电粒子赝快度分布的实验数据,研究了类环事例的产生机制.结果表明在一有限的时间-空间范围内相干胶子辐射是类环事例的一种可能的产生机制,但肯定不是主要的.     

Self-affine Fractality of Multiparticle Productionin pp Collisions at 400 GeV/c

A Self-affine fractality analysis was performed by using the experimental data of multiparticle production in pp collisions at 400GeV/c. Compared with the results obtained from the selfsimilar analysis, the self-affine fractality analysis shows a better scaling behavior within the limits of the experimenal resolution.     

400GeV/c pp碰撞赝快度分布涨落的分形分析

利用改进的多重分形矩分析了400GeV/c pp碰撞多重产生的分形行为.计算了广义维数D_q(q=2—5),并与由标度阶乘矩方法得到的结果作了比较.结果表明观察到了多重分形特征.对Fujio Takagi提出的分形分析方法作了探讨.     

400GeV/c pp碰撞连续阶数阶乘矩和多重分形分析

对华家照提出的F_q矩的矩阶数连续化方案进行了检验,发现它不能用于真实数据的分析,对此作了改进,使它能用于真实的实验数据的分析,对400GeV/c pp碰撞产生的带电粒子赝快度分布实验数据的分析结果表明,阶乘矩的矩阶数连续崐化方法是可行的,说明在400GeV/c pp碰撞多重产生过程中可能存在多重分形行为.     

Angular Dependence of Two Particle Correlation in 400GeV/c pp Collisions

The angular dependence of the particle-Particle comeladon (PPC) and its asytiumeby (PPCA) have been calculated by using the experimental data of multiplicity production for pp collisions at 400GeV/ c. The results are different stmngly from the overall behavior of e⁺e^－ data,but agree with the results obtained by NA22 collaboration quite well. The leading particles influence stingily the PPCA disribibudons for hadronic collisions data. The calculated results for the distributions of the azimuthal difference between two pardcles mean that the azimuthal correlation has been observed.     

Fractal Analysis of Pseudorapidity Distribution Fluctuation in 400GeV/c pp Collisions

The fractal behaviour of multiplicity production in 400 GeV/c pp collisions is analyzed using the modified multifractal moments.The generalized dimensions D_q,q=2—5,are calculated.A comparison with the results obtained by the method of scaled factorial moments has been made. The results show that the multifractal character is observed.The fractal analysis method proposed by Fujio Takagi has been tested.     

400GeV/c pp碰撞多粒子产生的不稳定性分析

对400GeV/c pp碰撞多粒子产生的实验数据作了不稳定性分析.计算了新的不稳定性参数.将它们与曹珍和华家照利用软相互作用模型ECOMB模拟NA22能量范围的强子一强子碰撞实验所得到的结果相比较,相似性清楚可见.这表明ECOMB模型是一个软相互作用多粒子产生模型.它能重现高能强子碰撞末态事例结构的涨落.     

400GeV/cpp碰撞多粒子产生的自仿射分形

利用４００ＧｅＶ／ｃｐｐ碰撞多粒子产生的实验数据进行了自仿射分形分析，并与自相似分析相比较，结果表明在实验分辨能力范围内，自仿射分形分析具有嵔虾玫谋甓刃形     

400GeV/c pp碰撞多粒子产生的分形行为

对400GeV/cpp碰撞产生的带电粒子赝快度分布的实验数据用G矩方法进行了多重分形分析.在分割代数v很小的情况下得到的广义维数是不同的(1>D0>D1>D2…);谱函数是光滑的,凹面向下,在α0时为峰值;重新标度后的谱函数大在时具有普适性.这些结果与其它实验是一致的.     

400GeV/cpp碰撞多粒子产生过程的混沌行为

利用４００ＧｅＶ／ｃｐｐ碰撞多粒子产生的实验数据计算了ＱＣＤ分支过程的熵指数，得到了非零值，熵指数随末态粒子平均多重数的减小而增大。表明在４００ＧｅＶ／ｃｐｐ碰撞中有存在混沌性的迹象。     

400GeV/c pp碰撞集束参数和集束关联子数据

利用400GeV/c pp碰撞产生的带电粒子赝快度分布和方位角分布计算了集束参数和集束关联子.结果表明集束参数不仅依赖于多重数分布的宽度,还与粒子间的关联有关.在赝快度和方位角空间,集束参数_η 2(M)和η₃ (M)遵循同样的幂律行为,表明在400GeV/c　pp碰撞多重产生中多重分形行为被观测到了.在赝快度空间二级集束关联子依赖于多重数分布的宽度,并随子区间之间的距离的增加而减小.