Nuclear Effect Study Under K Factor's Nonconstancy

Abstract

A consistent approach to estimating nuclear e ect functions R A v (x 2 ) and R A s (x 2 ) based on numerical iteration technique is presented in the quark-parton model when taking into account the nonconstancy of quantum chromodynamics correction factor K. R A v (x 2 ) and R A s (x 2 ) correspond respectively to the valence quark distributions for one bo u n dnucleon within the nucleus and to the sea quark ones. Related numerical analysis is given for nuclei 12 6 C, 40 20 Ca, and 56 26 Fe. As the basis, it adopts bo t hexperimental data of the high energy proton-nucleus Drell{Yan process and of the high energy lepton-nucleus deep inelastic scattering.

Effect of Nuclear Binding Energy to K Factor

“…And some scientists found that the reaction cross section is easier to measure when they use a nucleus struck another nucleus (A-A collision). [4] Nuclear effect to reaction cross section cannot be neglected in A-A collision Drell-Yan process. Nuclear shadowing effect and nucleon Fermi movement effect have been taken into account, but nuclear binding energy is often neglected as a small value when calculating reaction cross section by a lot of people because it is too small compared with collision energy.…”