Two-pion interferometry at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions

doi:10.1088/1009-1963/13/3/013

中国物理B ›› 2004, Vol. 13 ›› Issue (3): 341-343.doi: 10.1088/1009-1963/13/3/013

Two-pion interferometry at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions

陈小凡, 杨学栋, 韩玲

Department of Physics, Harbin Institute of Technology, Harbin 150001, China

收稿日期:2003-05-16 修回日期:2003-08-26 出版日期:2004-03-06 发布日期:2005-07-06

Two-pion interferometry at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions

Chen Xiao-Fan (陈小凡), Yang Xue-Dong (杨学栋), Han Ling (韩玲)

Department of Physics, Harbin Institute of Technology, Harbin 150001, China

Received:2003-05-16 Revised:2003-08-26 Online:2004-03-06 Published:2005-07-06

摘要/Abstract

摘要： A two-pion correlation function at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions is obtained using two-pion interferometry at small relative momentum, and the relations between the real and apparent parameters of the pion source are given. The relations can be used to extract both the temperature and the transverse and longitudinal expansion velocities of pion sources and to verify the correctness of relativistic transformation T′=T\sqrt {1-v^2} of temperature in relativistic statistical mechanics and thermodynamics.

关键词: two-pion interferometry, relativistic heavy ion collisions, relativistic

Abstract: A two-pion correlation function at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions is obtained using two-pion interferometry at small relative momentum, and the relations between the real and apparent parameters of the pion source are given. The relations can be used to extract both the temperature and the transverse and longitudinal expansion velocities of pion sources and to verify the correctness of relativistic transformation $T'=T\sqrt{1-v^2}$ of temperature in relativistic statistical mechanics and thermodynamics.

Key words: two-pion interferometry, relativistic heavy ion collisions, relativistic

中图分类号: (Quarks, gluons, and QCD in nuclear reactions)

24.85.+p

25.70.Pq (Multifragment emission and correlations) 24.10.Pa (Thermal and statistical models)

陈小凡, 杨学栋, 韩玲. Two-pion interferometry at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions[J]. 中国物理B, 2004, 13(3): 341-343.

Chen Xiao-Fan (陈小凡), Yang Xue-Dong (杨学栋), Han Ling (韩玲). Two-pion interferometry at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions[J]. Chinese Physics, 2004, 13(3): 341-343.

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Two-pion interferometry at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions

Two-pion interferometry at small relative momentum for pion sources with transverse and longitudinal expansions in relativistic heavy ion collisions

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