Light quark and antiquark constraints from new electroweak data

Abstract

We present a new parton distribution function analysis which includes new data for $W$ boson production in proton-proton collisions and lepton pair production in proton-proton and proton-deuteron collisions. The new data provide strong constraints on the light antiquark parton distribution functions in the proton. We identify an interesting correlation between the $d/u$ ratio and the $\overline{d}/\overline{u}$ ratio which leads to a modification of our previous results for the $d/u$ ratio as the parton momentum fraction $x\ensuremath{\rightarrow}1$.

Topics & Concepts