Non-Gaussian Fluctuations near the QCD Critical Point

被引：566
|
作者：
Stephanov, M. A. [1 ]
机构：
[1] Univ Illinois, Dept Phys, Chicago, IL 60607 USA
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 03期
关键词：
FINITE-TEMPERATURE; PHASE-DIAGRAM; DENSITY; COLLISIONS;
D O I：
10.1103/PhysRevLett.102.032301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the effect of the QCD critical point on non-Gaussian moments (cumulants) of fluctuations of experimental observables in heavy-ion collisions. We find that these moments are very sensitive to the proximity of the critical point, as measured by the magnitude of the correlation length xi. For example, the cubic central moment of multiplicity <(delta N)(3)>similar to xi(4.5) and the quartic cumulant <(delta N)(4)>(c)similar to xi(7). We estimate the magnitude of critical point contributions to non-Gaussian fluctuations of pion and proton multiplicities.
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页数：4
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