共查询到16条相似文献,搜索用时 109 毫秒
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本文对阶乘矩的两种不同归一化进行了细致的分析,发现在固定多重数以及间歇程度不依赖于多重数的情况下,两种归一化得到的间歇指数相等.对于多重数不固定,而间歇程度与多重数有关的情况,给出了两种不同归一化得到的间歇指数用动力学间歇指数表示的公式.本文还在间歇程度依赖于单事件平均横动量的假定下,全面复现了实验上观察到的间歇对横动量截断的依赖性,证实了平均横动量对于决定间歇程度有重要意义. 相似文献
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Scaled factorial moment analysis for the multiplicity distribu- tions of shower particles in the pseudorapidity phase space has been done. An evidence for the presence of dynamical uctuations has been shown for the non-peripheral interactions of28Si+Ag(Br) at 14.6 A GeV/c and 4.5 A GeV/c.The results have been compared with the values obtained from data sample calculated by cascade-evaporation model. 相似文献
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Shaoshun Wang Jie Zhang Chenguo Xiao Yunxiu Ye 《Zeitschrift fur Physik C Particles and Fields》1995,68(3):415-423
The pseudorapidity distribution of charged particles produced in pp collisions at 400 GeV/c was measured by using LEBC films offered by CERN NA27 collaboration. The scaled factorial cumulant moments have been calculated. The results show that the second order cumulants have positive values, while the cumulants of higher order are consistent with zero except for the situation ofn ch ≥ 4 events, where the third-order cumulants have positive values beyond the statistical uncertainties. It means that the observed increase of the higherorder factorial momentsF q is almost due to the dynamical two-particle correlation in pp collisions at 400 GeV/c. The cumulant moments also have been calculated by star correlation integrals. It significantly reduced the statistical errors, especially for higher order cumulants. From Monte Carlo events with the same single particle spectrum and no correlations, we observed that for broad mixed-multiplicity distributions, a significant part ofK 2 is coming from the single-particle fluctuation due to the fluctuating multiplicity. 相似文献
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Within the framework of Ginzburg–Landau theory, the effect of multiplicity correlation between the dynamical multiplicity fluctuations is analyzed for a first-order phase transition from quark–gluon plasma to hadrons.Normalized factorial correlators are used to study the correlated dynamical fluctuations. A scaling behavior is found among the factorial correlators, and an approximate universal exponent, which is weakly dependent on the details of the phase transition, is obtained. 相似文献
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S. K. Soni Sudhir Malik R. K. Shivpuri 《Zeitschrift für Physik A Hadrons and Nuclei》1994,348(4):311-315
Experimental results on some characteristics of high multiplicity (≧45) proton-AgBr interactions at 800 GeV are presented. The results are compared with those in lower multiplicity regions as well as for CNO target. The various parameters investigated here are pseudorapidity distribution, mean normalised multiplicity, mean number of intranuclear collisions and normalised pseudorapidity. 相似文献
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WANG Shao-Shun ZHANG Jie XIAO Chen-Guo YE Yun-Xiu CHENG Zheng-Dong ZHANG Xue-Qian LUO Qi XU Wan-Li XIONG Wei-Jun 《中国物理C(英文版)》1992,16(6):487-493
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. 相似文献