Evidence of self-affine multiplicity fluctuation of particle production in ^84Kr-emulsion interactions at 1.7 A GeV  

作　　者：张东海 李惠玲 

机构地区：[1]Institute of Modern Physics, Shanxi Normal University

出　　处：《Chinese Physics B》2009年第2期522-530,共9页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos 10475054 and 10675077);the Research Foundation of Ministry of Education of China (Grant No 205026);the Natural Foundation of Shanxi Province, China (Grant No2008011005);Shanxi Provincial Foundation for Returned Scholars, China (Grant No 20031046)

摘　　要：Self-affine multiplicity fluctuation is investigated by using the two-dimensional factorial moment methodology and the concept of the Hurst exponent （H）. Investigation on the experimental data of compound particles and target fragments emitted in ^84Kr-AgBr interactions at 1.7 A GeV reveals that the best power law behaviours are exhibited at H=0.7 and 0.6 respectively, and the data for shower particles produced in ^84Kr-emulsion interactions at 1.7 A GeV indicate that the best power law behaviour occurs at H=0.6, all of which show the self-affine multiplicity fluctuation patterns. The multifractality and the non-thermal phase transition occurring during producing the compound particles, the target fragments, and the shower particles in the ^84Kr -AgBr interaction and the ^84Kr-emulsion interaction are also discussed. The multifractality is observed during producing compound particles, target fragments, and shower particles. In the target fragment production, an evidence of non-thermal phase transition is observed, but in the shower particle production and the compound particle production, no evidence of non-thermal phase transition is observed.Self-affine multiplicity fluctuation is investigated by using the two-dimensional factorial moment methodology and the concept of the Hurst exponent （H）. Investigation on the experimental data of compound particles and target fragments emitted in ^84Kr-AgBr interactions at 1.7 A GeV reveals that the best power law behaviours are exhibited at H=0.7 and 0.6 respectively, and the data for shower particles produced in ^84Kr-emulsion interactions at 1.7 A GeV indicate that the best power law behaviour occurs at H=0.6, all of which show the self-affine multiplicity fluctuation patterns. The multifractality and the non-thermal phase transition occurring during producing the compound particles, the target fragments, and the shower particles in the ^84Kr -AgBr interaction and the ^84Kr-emulsion interaction are also discussed. The multifractality is observed during producing compound particles, target fragments, and shower particles. In the target fragment production, an evidence of non-thermal phase transition is observed, but in the shower particle production and the compound particle production, no evidence of non-thermal phase transition is observed.

关 键 词：relativistic heavy-ion collision non-statistical fluctuation nuclear emulsion 

分 类 号：O571[理学—粒子物理与原子核物理]