On K -Factor's Non-Constancy for the Drell-Yan Process in Carbon-Carbon Nuclear Collision

Abstract

The double Q 2 -rescaling model is used to compute the change of K-factor with XA2 when the nucleus carbon-nucleus carbon collision occurs at different values of x A \, where x are momentum fraction variables. In the calculation, the contributions of annihilations and Compton scattering have been considered for the Drell-Yan process. The calculated results show that the plots of K-factor versus x A2 are very different for different values ofx Ai . They are also compared with experimental data, which provides a test to the model of nuclear effect and the QCD theory itself.

Non-perturbative QCD Effect on K -Factor of Drell–Yan Process

“…For the Drell-Yan process of nucleus-nucleus collision, K(x 1 , x 2 ) can be calculated in terms of the expression of Q n A (t 1, t 2 ) as follows: [6] Q…”