【摘要】 在QQ的色八重态产生机制下,用三组Pom eron 的部分子分布函数,在 s =200 GeV,4 GeV< PT< 10 GeV 条件下,计算并讨论了γ+ P→P+ J/ψ+ X过程中J/ψ的产生截面.计算结果受色八重态顶角因子的选取的影响很大,硬衍射截面与单举截面的比值能减小这种影响,如果能消除顶角因子的影响.则比值的大小只与Pom eron 的流因子及部分子分布函数有关.更多还原

【Abstract】 In the fram e of the color-octet m echanism ,using three sets of parton distribution function ofpom eron,thecrosssection ofJ/ψin γ+ p→p+ J/ψ+ Xprocessis calculated and discussed w ith the s = 200 GeV,4 GeV< PT < 10 GeV.It is shown that the color-octet m atrix elem ents influence the corss section greatly, but they influence the ratio ofdiffractive cross section to inclusive crosssection little. And ifthe influence is elim inated,the ratio is only related to the flux factorand parton distribution functions ofpom eron.更多还原