高能重离子碰撞中产生的末态粒子的横质量谱(英文)  

Transverse Mass Spectra in High-energy Heavy-ion Collisions

作　　者：谢文杰[1] 

机构地区：[1]运城学院物理与电子工程系,山西运城044000

出　　处：《原子核物理评论》2012年第1期36-44,共9页Nuclear Physics Review

基　　金：National Natural Science Foundation of China(10975095);Natural Science Foundation of Shanxi Province(2007011005)~~

摘　　要：基于多源理想气体模型,用两个方程分别描述了高能重离子中心碰撞中产生的p,K±和π±的横质量分布。在忽略末态粒子的相对论效应的情况下,除π±外,计算结果可近似地描述实验结果。考虑了源的次级样本后,发现计算结果与高能Au-Au和Pb-Pb中心碰撞的实验结果符合得较好。Based on the multisource ideal gas model,which do not consider the dynamic mechanism of particles,two formulae are given to describe the transverse mass distributions of protons,kaons and pions produced in central heavy ion collisions at high energies.In the case of neglecting the relativistic effect,our calculated results approximately describe the experimental data,except for pions.By considering the sub-samples of the sources,it is found that our calculated results are in good agreement with the experimental data in the central Au-Au and Pb-Pb collisions at high energies.

关 键 词：多源理想气体模型 横质量谱 Au-Au碰撞 Pb-Pb碰撞 

分 类 号：O571.6[理学—粒子物理与原子核物理]