200GeV下质子质子对撞过程中的η介子产额增强的模拟  

Simulation of the enhancement of η meson's production in p+p collision at 200 GeV

作　　者：黄柄矗[1] 张一飞[1] 张子平[1] 

机构地区：[1]中国科学技术大学近代物理系,安徽合肥230026

出　　处：《中国科学技术大学学报》2008年第11期1255-1257,1275,共4页JUSTC

基　　金：国家自然科学基金(10275060;10475071;10805046)资助

摘　　要：应用PYTHIA产生器进行Monte Carlo模拟,分析了200GeV下的质子质子(p+p)对撞过程中的不变产额,并对η衰变到γμ+μ-的反应道进行了模拟.模拟结果表明,η的产额和衰变末态的μ子的产额之间有着线性关系.通过模拟估算了实验上因热密核物质中产额的增强而可能观测到的μ子对数,对实验观测和物理分析具有指导作用.该测量对检验手征对称理论有着重要的意义.PYTHIA generator was used for Monte Carlo simulation. The invariant production of η meson in p＋p collision at 200 GeV was studied by the decay channel：η→γμ＋μ^-. The simulation results show a linear relationship between the invariant production of the η and μ. In the simulation, the statistics of the μ pairs, which could be observed in the experiment under the enhancement of the production of η in hot dense matter, was estimated. The simulation may serve as a guide for future experiments and physics analyses on the enhancement of the η production. This work is also an important test for the theory of chiral symmetry.

关 键 词：PYTHIA模拟 不变产额 η衰变 手征对称 

分 类 号：O571.6[理学—粒子物理与原子核物理]