Measurement of the Absolute Drell-Yan Cross Section in p + p and p + d Collisions with a 120 GeV Proton Beam at Fermilab

Drell-Yan (DY) dimuon production in p + p and p + d collisions provides a powerful, direct probe of the antiquark structure of the nucleon. While the p + d/p + p cross-section ratio is famously sensitive to the ¯d(x)/¯u(x) flavor asymmetry, measurements of the absolute cross sections are essential for independently constraining the ¯d(x) and ¯u(x) parton distribution functions (PDFs) and for testing higher-order QCD predictions. The SeaQuest (E906) experiment at Fermilab utilized a 120 GeV proton beam incident on liquid hydrogen and deuterium targets to collect a large dataset of DY events, specializing in the high-Bjorken-x kinematic region where antiquark distributions remain poorly constrained. This talk will report on the status of the ongoing analysis to extract the absolute DY cross sections for both reactions. We will present preliminary results from the p + p and p + d dataset and discuss the analysis methodology. Furthermore, we will present the status of the dimuon transverse momentum (pT ) distribution analysis. These pT -dependent cross sections provide access to the intrinsic transverse momentum of partons and offer constraints on Transverse Momentum Dependent (TMD) PDFs, such as the Boer-Mulders function. These measurements will furnish crucial new data for global PDF analyses and provide stringent tests of non-perturbative models of nucleon structure.