菲尔德-费曼模型中的介子碎裂函数  

Meson Fragmentation Functions in the Field-Feynman Model

作　　者：华靖[1] 马伯强[1] 

机构地区：[1]北京大学物理学院,北京100871

出　　处：《高能物理与核物理》2003年第11期954-959,共6页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金(10025523;90103007)~~

摘　　要：从菲尔德-费曼的叠代模型出发,考虑到入射夸克的味结构,研究了π介子的碎裂函数D_u~π^+,D_d~π^+,和D_s~π^+,并将分析结果和实验数据进行了比较,对K介子的碎裂函数D_s^K^+(z),D_u^K^+(z),D_s^K^+(z)和D_d^K^+(z)作出的预言将被进一步的实验检验。The pion fragmentation functions are studied in the Field-Feynman recursive model with distinction of Duπ+, Ddπ+ and Dsπ+ , by taking into account the flavor structure in the excitation of the sea quark-antiquark pairs by the initial quarks. The analytical results obtained are compatible with the available empirical results with only three parameters. The framework is also extended to predict the kaon fragmentation functions with distinction of DsK+(z) , DuK+ (z) ,DsK+(z) and DdK+ (z) . This work gives a significant modification to the original model, and the predictions can be tested by further experimental results on kaon fragmentation functions.

关 键 词：高能碰撞 Π介子 碎裂函数 K介子 菲尔德-费曼模型 叠代模型 夸克 味结构 

分 类 号：O572.3[理学—粒子物理与原子核物理]