色八重态机制与p-p碰撞中J/Ψ粒子的产生  

The color octet model and J/Ψ production in p-p collisions

作　　者：刘植凤[1] 段春贵[2] 

机构地区：[1]石家庄经济学院地球动力研究所,石家庄050031 [2]河北师范大学物理与信息工程学院,石家庄050016

出　　处：《华中师范大学学报（自然科学版）》2007年第3期355-357,共3页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金资助项目(10575028).

摘　　要：计算了色单态和色八重态产生机制下高能非极化p-p碰撞中J/Ψ粒子产生的微分截面随质心系能量的变化,并与实验数据进行了对比.结果表明,仅考虑部分子融合过程,色八重态产生机制能很好地解释高能碰撞中J/Ψ粒子产生的实验数据,明显优于色单态机制,同时发现粲夸克质量取值得不同也会对产值的计算产生影响.Using color singlet model and color octet model we calculated the J/Ψ prodiction cross section with respect to the cms-energy in unpolarized p-p collisions and compared them with the existed experiment data. We have demonstrated that the color octet mechanism using only parton fusion process is able to reproduce the existed experiment data on cms-energy distribution of J/Ψ production. So it is the dominant production mechanism of J/Ψ At the same time we find that the different mass of Charm can also effected our calculation.

关 键 词：色单态 色八重态 快度 分支比 

分 类 号：O572.2[理学—粒子物理与原子核物理]