Characterizing variable for the critical point in momentum space

The possible experimentally observable signal in momentum space for the critical point, which is free from the contamination of statistical fluctuations, is discussed. It is shown that the higher order scaled moment of transverse momentum can serve as an appropriate signal for the critical point, pr...

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Bibliographic Details
Published in:Chinese physics C 2009-08, Vol.33 (8), p.655-660, Article 655
Main Author: 杜佳欣 柯宏伟 许明梅 刘连寿
Format: Article
Language:English
Subjects:
临界点
动量分布
实验观察
模型构造
温度梯度
空间变量
统计数字
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Summary:The possible experimentally observable signal in momentum space for the critical point, which is free from the contamination of statistical fluctuations, is discussed. It is shown that the higher order scaled moment of transverse momentum can serve as an appropriate signal for the critical point, provided the transverse momentum distribution has a sudden change when energy increases passing through this point. A 2-D percolation model with a linear temperature gradient is constructed to check this suggestion. A sudden change of third order scaled moment of transverse momentum is observed.
ISSN:1674-1137
0254-3052
2058-6132
DOI:10.1088/1674-1137/33/8/011