The Measurement of the Seaquark Sivers Asymmetry in Fermilab E1039 Polarized Drell-Yan Experiment

Despite significant progress achieved in the past experimental measurements, the problem of the full description of the nucleon spin composition remains unresolved. As a continuing effort of this broad program, Fermilab E1039 experiment was proposed to access the sea quark Sivers function by measuring transverse single spin asymmetry in Drell-Yan production. These measurements will test if the sea quark orbital angular momentum contributes to the total nucleon spin. The upcoming E1039 experiment will utilize the 120 GeV unpolarized proton beam along with a transversely polarized ammonia target and the existing E906 SeaQuest detector package. We will report on the current status of the E1039 Drell-Yan experiment.