Polarized light-flavor antiquarks from Drell-Yan processes of h+N→l⁺⁻ + l⁻⁺ + X

الأصل · EN

We propose a formula to determine the first moment of difference between the polarized u- and d-quarks in the nucleon, i.e. Δ u-Δ d from the Drell-Yan processes in collisions of unpolarized hadrons with longitudinally polarized nucleons by measuring outgoing lepton helicities. As coefficients in the differential cross section depend on the u- and d-quark numbers in the unpolarized hadron beam, the difference Δ u-Δ d can be independently tested by changing the hadron beam. Moreover, a formula for estimating the K-factor in Drell-Yan processes is also suggested.