2020/12/31 by Tian-Xing Bai, Chun-Gui Duan · 2 citations
Engineering · Physics and Astronomy · #Drell–Yan process #High-Energy Particle Collisions Research #Nuclear matter #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Parton #Physics #Quark #Superconducting Materials and Applications #Top quark #hep-ph
paper · pdf · doi:10.1140/epjp/s13360-021-01618-2
published in The European Physical Journal Plus 136(6) (Springer Science+Business Media) · arXiv admin note: text overlap with arXiv:2011.14350
openalex created_date 2020/12/21 · openalex publication_date 2021/06/01 · arxiv created 2021/06/11 · arxiv updated 2021/06/14 · openalex updated_date 2026/08/05
The Drell-Yan process for proton incident on nuclei is an excellent place for deeply studying the parton propagation in a nucleus. By means of the nuclear parton distributions determined only with lepton-nuclear deep inelastic scattering experimental data and the analytic parameterization of quenching weight based on BDMPS formalism, a phenomenological analysis of the nuclear Drell-Yan differential cross section ratio as a function of Feynman variable is performed from Fermilab E906 and E866 experimental data. With the nuclear geometry effect on nuclear Drell-Yan process and the quark transport coefficient as a constant, our predictions are in good agreement with the experimental measurements. It is found that nuclear geometry effect has a significant impact on the quark transport coefficient in cold nuclear matter. It is necessary to consider the detailed nuclear geometry in studying the nuclear Drell-Yan process. Our calculated results reveal that the difference in the values of quark transport coefficient exists from E906 and E866 experiments. However, confirming the conclusion that the quark transport coefficient depends on the target-quark momentum fraction, still need more accurate experimental data on the Drell-Yan differential cross section ratio in the future. Three models are proposed and discussed for the quark transport coefficient as a function of the measurable kinematic variables. The quark transport coefficient q is determined as a function of the Bjorken variable x2 and scale Q2. It is hoped that the parametrization form of quark transport coefficient in the cold nuclear medium can help to think about the parton propagation mechanism in nuclear matter.