Interferometry imaging for the evolving source in heavy ion collisions at HIRFL-CSR energy

Imaging analysis of two-pion interferometry is performed for an evolving particle-emitting source in heavy ion collisions at HIRFL-CSR energy. The source evolution is described by the relativistic hydrodynamics in （2＋1） dimensions. The model-independent characteristic quantities of the source are in...

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Published inChinese physics C Vol. 36; no. 3; pp. 216 - 221
Main Author 尹洪杰 M．J．Efaaf 张卫宁
Format Journal Article
LanguageEnglish
Published 01.03.2012
Subjects
Atomic collisions
Computational fluid dynamics
Evolution
Fluid flow
Gaussian
HIRFL-CSR
Imaging
Interferometry
Standard deviation
公式拟合
干涉成像
成像分析
相对论流体力学
粒子发射源
能源
重离子碰撞
Online AccessGet full text
ISSN1674-1137
0254-3052
DOI10.1088/1674-1137/36/3/005

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Summary:Imaging analysis of two-pion interferometry is performed for an evolving particle-emitting source in heavy ion collisions at HIRFL-CSR energy. The source evolution is described by the relativistic hydrodynamics in （2＋1） dimensions. The model-independent characteristic quantities of the source are investigated and compared with the interferometry results obtained by the usual Gaussian formula fit. It is found that the firstorder source function moments can describe the source sizes. The ratio of the normalized standard deviation to the first-order moment R,σ/R, is sensitive to the shape of the source function.
Bibliography:11-5641/O4
interferometry, imaging, evolving sources, heavy ion collisions, HIRFL-CSR energy
YIN Hong-JieM.J. Efaaf ZHANG Wei-Ning（School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China 2 Department of Physics, Harbin Institute of Technology, Harbin 150006, China 3 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou, Lanzhou 730000, China）
Imaging analysis of two-pion interferometry is performed for an evolving particle-emitting source in heavy ion collisions at HIRFL-CSR energy. The source evolution is described by the relativistic hydrodynamics in （2＋1） dimensions. The model-independent characteristic quantities of the source are investigated and compared with the interferometry results obtained by the usual Gaussian formula fit. It is found that the firstorder source function moments can describe the source sizes. The ratio of the normalized standard deviation to the first-order moment R,σ/R, is sensitive to the shape of the source function.
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ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/36/3/005