Searching for the QCD critical point in AA collisions at CERN SPS

被引：2
|
作者：
Davis, N. [1 ]
Antoniou, N. G. [1 ]
Diakonos, F. K. [1 ]
机构：
[1] Univ Athens, Dept Phys, GR-10679 Athens, Greece
来源：
PHYSICS OF ATOMIC NUCLEI | 2012年 / 75卷 / 06期
关键词：
PHASE-DIAGRAM; TEMPERATURE; RESTORATION; DENSITY;
D O I：
10.1134/S1063778812060117
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We investigate the transverse momentum correlations of pairs of opposite charged pions near their production threshold. Through intermittency analysis, we search for power-law dependence on observation scale, as dictated by critical QCD. We analyze the data on the most central collisions in four A systems (A = p, C, Si, Pb) at maximum SPS energy. We find a significant effect for the SiSi system approaching in size the critical QCD predictions as measured by the intermittency index I center dot (2). Absence of this effect in the (pi (-), pi (-)) sector of the SiSi system gives further support that the observed behavior in the isoscalar mode is of critical origin.
引用
收藏
页码：661 / 663
页数：3
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