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

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【作者】 尹洪杰； M. J. Efaaf； 张卫宁；

【Author】 YIN Hong-Jie1 M. J. Efaaf1 ZHANG Wei-Ning1,2,3;1) 1 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

【机构】 School of Physics and Optoelectronic Technology, Dalian University of Technology； Department of Physics, Harbin Institute of Technology； Center of Theoretical Nuclear Physics, National Laboratory of Heavy Ion Accelerator of Lanzhou；

【摘要】 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 σ to the first-order moment R, σ/R, is sensitive to the shape of the source function.

【Abstract】 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 σ to the first-order moment R, σ/R, is sensitive to the shape of the source function.

【关键词】 interferometry； imaging； evolving sources； heavy ion collisions； HIRFL-CSR energy；
【Key words】 interferometry； imaging； evolving sources； heavy ion collisions； HIRFL-CSR energy；
【基金】 Supported by National Natural Science Foundation of China (11075027)
  • 【文献出处】 中国物理C ,Chinese Physics C , 编辑部邮箱 ,2012年03期
  • 【分类号】O572.21
  • 【下载频次】33
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