pp反应过程强子产生的不对称性  

Asymmetry of Hadron Production in ppReaction

作　　者：刘希明[1] 赵宁华[1] 兰建胜[1] 

机构地区：[1]山东大学物理系,济南250100

出　　处：《高能物理与核物理》2005年第12期1125-1130,共6页High Energy Physics and Nuclear Physics

摘　　要：计算与分析了pp与p反应过程中轻味uds夸克的平均产生几率,得到它们与反应类型和反应能量的关系.进一步得出各种强子的相对产率,发现平均粒子产率,同位旋对称性,正反粒子多重数比例以及奇异抑制因子等,都与具体反应类型以及反应能量有关,特别得出pp反应中正反重子比率大于1 这与重离子碰撞实验结果非常吻合.The mean production probability of light flavor u, d and s quarks in the pp and pp^- reaction is calculated and discussed in this paper. It is found that the production probability depends on the energy and type of the reaction. As a result, the average yields of directly hadrons, the asymmetry of isospin, and the ratio of particle to antiparticle are all dependent on the energy and type of the reaction. In particular, we find that the ratio of banyon to antibaryon in pp reactions is larger than 1, which is consistent with the experiment results of heavy ion colliding.

关 键 词：PP(P^-)反应 夸克产生几率 粒子多重数正反重子比 

分 类 号：O572.3[理学—粒子物理与原子核物理]