Energy dependence of pion interferometry scales in ultra-relativistic heavy ion collisions

被引：23

作者：

Karpenko, Iu. A. ^{[1
,2
]}

Sinyukov, Yu. M. ^{[1
,3
]}

机构：

[1] Bogolyubov Inst Theoret Phys, UA-03680 Kiev 143, Ukraine

[2] Univ Nantes, CNRS, IN2P3, EMN,SUBATECH, Nantes, France

[3] GSI Helmholtz Zentrum Schwerionenforsch, EMMI, D-64291 Darmstadt, Germany

来源：

PHYSICS LETTERS B | 2010年 / 688卷 / 01期

关键词：

A plus A collisions; SPS; RHIC; LHC; Interferometry radii; HBT puzzle; Transverse spectra; Pre-thermal flows; Energy density; HBT-INTERFEROMETRY; MATTER; HYDRODYNAMICS;

D O I：

10.1016/j.physletb.2010.03.068

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A study of energy behavior of the pion spectra and interferometry scales is carried out for the top SPS, RHIC and LHC energies within the hydrokinetic approach. The latter allows one to describe evolution of quark-gluon and hadron matter as well as continuous particle emission from the fluid in agreement with the underlying kinetic equations. The main mechanisms that lead to the paradoxical, at first sight. behavior of the interferometry scales, are exposed. In particular, a slow decrease and apparent saturation of R-out/R-side ratio with an energy growth happens due to a strengthening of positive correlations between space and time positions of pions emitted at the radial periphery of the system. Such en effect is a consequence of the two factors: a developing of the pre-thermal collective transverse flows and an increase of the initial energy density in the fireball. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：50 / 54

页数：5

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