We examine the production of neutral current Drell-Yan (DY) lepton pairs within the framework of the Standard Model Effective Field Theory (SMEFT). Utilizing the open-source fit platform xFitter, we explore the impact of high-statistics measurements of the neutral current DY (NCDY) forward-backward asymmetry AFB near the weak boson mass scale in both the present and upcoming stages of the Large Hadron Collider (LHC). Our analysis not only confirms previous findings regarding the sensitivity of AFB to parton distribution functions (PDFs) but also delves into the precise determination of Z-boson couplings to left-handed and right-handed u-quarks and d-quarks. Additionally, we investigate contributions beyond the Standard Model using the SMEFT framework. We provide insights into the significance of the AFB asymmetry for the electroweak SMEFT fit and the precision study of Z-boson physics at both the LHC and the high-luminosity HL-LHC.
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Andrii Anataichuk (2024) studied this question.
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