Measurements of the Antiquark Flavor Asymmetry in the Proton by the Drell-Yan Experiment SeaQuest

Abstract

The antiquark flavor asymmetry \bar{d}/\bar{u}d‾/u‾ in the proton gives an insight on the non-perturbative structure of the proton. The SeaQuest experiment measured the Drell–Yan cross section ratio of proton-deuterium to proton-proton to determine the antiquark flavor asymmetry \bar{d}/\bar{u}d‾/u‾ precisely in the range of 0.13<x<0.450.13<x<0.45. SeaQuest provides the evidence of \bar{d}/\bar{u} > 1.0d‾/u‾>1.0 over a wide range of momenta. Some theoretical models reproduce this result.