Event-by-event fluctuations of particle ratios in central Pb+Pb collisions at 20-158 A GeV

被引：45

作者：

Roland, C ^{[1
]}

机构：

[1] MIT, Cambridge, MA 02139 USA

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2004年 / 30卷 / 08期

关键词：

D O I：

10.1088/0954-3899/30/8/132

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：

In the vicinity of the QCD phase transition, critical fluctuations have been predicted to lead to non-statistical fluctuations of particle ratios, depending on the nature of the phase transition. Recent results of the NA49 energy scan programme show a sharp maximum of the ratio of K+ to pi(+) yields in central Pb+Pb collisions at beam energies of 20-30 A GeV. This observation has been interpreted as an indication of a phase transition at low SPS energies. We present first results on event-by-event fluctuations of the kaon to pion and proton to pion ratios at beam energies close to this maximum.

引用

页码：S1381 / S1384

页数：4

共 50 条

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