Omega Meson Cloud and the Proton's Light Anti-Quark Distribution

TL;DR

This paper employs the meson cloud model, including omega mesons, to calculate and explain the proton's light anti-quark distributions, aligning well with experimental data.

Contribution

It introduces the omega meson cloud into the meson cloud model to improve the understanding of proton anti-quark asymmetries.

Findings

Omega meson cloud improves data fit

Calculations match observed anti-quark distributions

Supports meson cloud model validity

Abstract

We use the meson cloud model of the nucleon to calculate distribution functions for $(\bar {d} - \bar{u})$ and $ \bar{d}/\bar{u}$ in the proton. Including the effect of the omega meson cloud, with a coupling constant $g_\omega^2/4\pi\approx 8$, allows a reasonably good description of the data.