高能Pb-Pb碰撞中产生的奇异粒子的横质量分布

原子核物理评论 , 2011, 28(2): 173-178.

高能Pb-Pb碰撞中产生的奇异粒子的横质量分布

谢文杰 ^1, , 杨德 ^2, , 王翠平 ^3, , 王志刚 ^4,

1.运城学院物理与电子工程系,山西运城,044000

2.运城学院物理与电子工程系,山西运城,044000

3.河北建筑工程学院数理系,河北张家口,075000

4.中国科学院高能物理研究所,北京,100049

基金项目: 国家自然科学基金资助项目(10975095) 山西省自然科学基金资助项目(2007011005)

关键词：横质量 , Pb-Pb碰撞 , 扩展的三火球模型

Transverse Mass Distributions of Strange Particles Produced in Pb-Pb Collisions at High Energies

Keywords： transverse mass , Pb-Pb collision , expansive three-fireball model

基于三火球模型,用蒙特卡罗方法计算了40和158 AGeV能量下Pb-Pb碰撞中产生的∧,(∧)和Ξ-强子的横质量分布.在计算中发现射弹核火球、中心火球和靶核火球在横向有明显的扩展,并且模型计算的结果与NA49合作组的实验结果相一致.

Transverse mass distributions of ∧,(∧), and Ξ- produced in Pb-Pb reactions at 40 and 158 AGeV are described by an expansive three-fireball model. A transverse expansion is observed in our calculation. The calculated results, by the expansive three-fireball model, are in agreement with the experimental data of NA49 Collaboration.

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