Speaker
Description
The SeaQuest experiment at Fermilab is designed to detect the Drell-Yan process in $p+p$ and $p+d$ reactions using the 120 GeV proton beam from the FNAL Main Injector in a fixed-target arrangement. SeaQuest recently observed a large $\bar{d}(x)/\bar{u}(x)$ asymmetry up to Bjorken $x$ as large as 0.45. The mechanism of this asymmetry has been studied via various theoretical models, and it was noted that the asymmetry of unpolarized distributions can be correlated with that of helicity distributions. As an example, the statistical model predicts a similar magnitude of $\bar{u}(x)$ and $\bar{d}(x)$) with the opposite sign, such that $\bar{d}(x) - \bar{u}(x) \approx - \left(\Delta\bar{d}(x) - \Delta\bar{u}(x)\right)$. The latest results from SeaQuest using an updated and higher precision measurement on the anti-quark flavor asymmetry will be presented.
