Entropy Analysis in Relativistic Heavy-Ion Collisions

被引：15

作者：

Ahmad, Shakeel ^{[1
]}

Ahmad, A. ^{[2
]}

Chandra, Anuj ^{[1
]}

Zafar, M. ^{[1
]}

Irfan, M. ^{[1
]}

机构：

[1] Aligarh Muslim Univ, Dept Phys, Aligarh 202002, Uttar Pradesh, India

[2] Aligarh Muslim Univ, Dept Appl Phys, Aligarh 202002, Uttar Pradesh, India

来源：

ADVANCES IN HIGH ENERGY PHYSICS | 2013年 / 2013卷

关键词：

RENYI ENTROPIES; RAPIDITY DENSITIES; FLUCTUATIONS; DEPENDENCE; SYSTEM; SPACE; AU;

D O I：

10.1155/2013/836071

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Entropy creation in multiparticle system is investigated by analysing the experimental data on ion-ion collisions at AGS and SPS energies and the results thus obtained are compared with those predicted by multiphase transport and correlation-free Monte Carlo models. Entropies produced in limited-and full-phase space are observed to increase with increasing beam energy. The entropy values, normalized to the maximum rapidity and plotted against pseudorapidity (bin width also normalized to the maximum rapidity), are found to be energy independent, exhibiting a kind of entropy scaling. Such scaling is observed in the full phase space as well as in the regions confined to the forward or backward hemispheres. The findings also reveal that there exist strong correlations amongst the particles produced in the forward and backward hemispheres around the midrapidity. These correlations are found to be of short range in nature, and the contributions from the long-range correlations seem to be absent. PACS numbers: 25.75-q, 25.75.Gz.

引用

页数：10

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