中国物理B ›› 2009, Vol. 18 ›› Issue (2): 522-530.doi: 10.1088/1674-1056/18/2/023

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

张东海, 李惠玲   

  1. Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
  • 收稿日期:2008-03-28 修回日期:2008-06-12 出版日期:2009-02-20 发布日期:2009-02-20
  • 基金资助:
    Project 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 No 2008011005) an

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

Zhang Dong-Hai(张东海)† and Li Hui-Ling(李惠玲)   

  1. Institute of Modern Physics, Shanxi Normal University, Linfen 041004, China
  • Received:2008-03-28 Revised:2008-06-12 Online:2009-02-20 Published:2009-02-20
  • Supported by:
    Project 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 No 2008011005) an

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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.

关键词: relativistic heavy-ion collision, non-statistical fluctuation, nuclear emulsion

Abstract: 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.

Key words: relativistic heavy-ion collision, non-statistical fluctuation, nuclear emulsion

中图分类号:  (Particle and resonance production)

  • 25.75.Dw
24.60.Ky (Fluctuation phenomena) 21.65.-f (Nuclear matter) 27.60.+j (90 ≤ A ≤ 149) 27.50.+e (59 ≤ A ≤ 89) 25.70.Mn (Projectile and target fragmentation)