Narrow Results

We present generalized evolution equations and factorization in terms of the truncated Mellin moments (TMM) of the parton distributions and structure functions. We illustrate the x and Q² dependence of TMM in the polarized case. Using the TMM approach we compare the integrals of g₁ with HERMES and COMPASS data from the limited x-ranges.

In this paper, we obtain the integrated flavor asymmetry of the sea quarks in the proton, ${\int }_0^1(\bar{d}-ū)dx$, with the help of the truncated moments approach elaborated in our previous papers. We use the difference between the light sea-quark distributions $\bar{d}-ū$ extracted from Drell–Yan (DY) NuSea/E866 measurements of the cross-section ratio ${\sigma }^{pd}/{\sigma }^{pp}$ and from the recent global analysis of deep inelastic scattering (DIS) $F_2^{p-n}$ data incorporating the reanalyzed neutron structure function. In our analysis, we also include the most recent DY data from the Fermilab SeaQuest/E906 experiment.