Measurement of DY Absolute Cross-Section for p+p and p+d Collisions with 120GeV Proton Beam in SeaQuest Experiment

The Drell-Yan process in proton-proton (p+p) and proton-deuteron (p+d) collisions provides a direct and powerful probe of the antiquark parton distribution functions (PDFs) within the nucleon. While the ratio of these cross sections constrains the light antiquark flavor asymmetry, ¯d(x)/¯u(x), measurements of the absolute cross sections are essential for determining the individual antiquark distributions and for testing higher-order QCD calculations. The Fermilab SeaQuest experiment (E906) was designed to study these reactions with high precision, particularly in the large Bjorken-x region where antiquark PDFs are poorly constrained. Using a 120 GeV proton beam incident on liquid hydrogen and deuterium targets, SeaQuest has collected a large dataset of Drell-Yan dimuon events. This talk will present the status of the ongoing absolute cross-section analysis for both p+p and p+d reactions, with a focus on preliminary results from the hydrogen target data. We will also discuss the status of the analysis of the dimuon transverse momentum (pT ) distributions, which probe the intrinsic transverse momentum of partons and offer constraints on Transverse Momentum Dependent (TMD) PDFs, such as the Boer-Mulders function. These measurements will provide crucial input for global PDF analyses and stringent tests of non-perturbative models of nucleon structure.