非微扰QCD和核遮蔽效应对K因子的影响

Non-perturbative QCD and Nuclear Shadowing Effect on K-factor

摘要: 考虑非微扰量子色动力学物理真空夸克凝聚效应，计算了碳核与碳核在质心系能量分别为630和200GeV时碰撞Drell—Yan过程的K因子，以及加入核遮蔽因子后非微扰效应对K因子的影响，并把计算结果与没有考虑夸克凝聚非微扰效应的K值进行了对比。结果表明，非微扰效应和核遮蔽效应对K因子影响很小。Considering quark condensate contributions from the QCD vacuum, the non-perturbative effect on the K-factor is investigated for the C-C collision Drell-Yan process with and without nuclear shadowing respectively, at the center-of-mass energy √s= 630 and 200 GeV. Comparison of the results indicates that both the non-perturbative effect and the nuclear shadowing effect pose a weak influence on the K-factor.

Abstract: Considering quark condensate contributions from the QCD vacuum, the non-perturbative effect on the K-factor is investigated for the C-C collision Drell-Yan process with and without nuclear shadowing respectively, at the center-of-mass energy √s= 630 and 200 GeV. Comparison of the results indicates that both the non-perturbative effect and the nuclear shadowing effect pose a weak influence on the K-factor.