摘要
用建立在ＬＵＮＤ弦模型特别是ＰＹＴＨＩＡ事件产生器基础上的描写极端相对论性核一核碰撞的强子和弦级联模型——ＪＰＣＩＡＥ研究了入射能量为２００Ａ ＧｅＶ的 Ｓ＋ Ａｕ中心碰撞中光子产生．模型同时考虑了部分子 ＱＣＤ散射过程、强子末态相互作用以及强子衰变等光子产生反应道并作了协调处理．ＪＰＣＩＡＥ模型计算结果很好再现了ＷＡ９３实验数据所呈现的低横动量增强效应．
A hadron and string cascade model, JPCIAE, which is based on LUND string model, PYTHIA event generator especially, is used to study the photon production of 200 A GeV S + An central collisions. The model takes into account photon produced from the partonic QCD scattering processe, the final-state hadronic interaction, and hadronic decay and deals with them consistently. The results of JPCIAE model reproduce successfully the WA93 data of low P_T enhancement. We have compared the contributions from different decay channels and discussed the role played by rescattering.
出处
《高能物理与核物理》
CSCD
北大核心
2000年第3期220-224,共5页
High Energy Physics and Nuclear Physics
基金
国家自然科学基金
核工业基金
关键词
光子产生
低横动量增强
JPCIAE模型
low PT enhancement of photon production, JPCIAE model, QCD hard scattering, hadronic interaction, hadronic decay
