双胶子交换模型中J/ψ的衍射产生

Diffractive ψ Production through Double Gluon Exchange Model in π and p Collision

利用双胶子交换模型并结合重夸克偶素的色八重态产生机制 ,计算了π与p碰撞过程中J ψ的衍射产生总截面 .结果发现 :随着质心系能量的增加 ,J ψ衍射产生的总截面逐渐增大 ;并且 ,不同的π介子中的胶子分布函数给出的总截面偏离也逐渐加大 .计算结果与未来的实验数据比较 。

Using double gluon exchange model and the heavy quarkonuim color octet production mechanism, the diffractive cross sections of ψ in the π a p collision process are calculated and discussed. The results show that the diffractive total cross section of ψ increases with the increasing center of mass energy. Furthermore, the discrepancy of the total cross section calculated with different gluon distribution functions also increases with the increasing center of mass energy. Comparing the calculated results with the future experiment data, the gluon distribution function of π and double gluon exchange model could be examined.