The $bard-\bar{u}$ asymmetry of the proton in a Pion Cloud Model approach

Abstract

We study the $bard-\bar{u}$ asymmetry of the proton in a model approach in which hadronic fluctuations of the nucleon are generated through gluon splitting and recombination mechanisms. Within this framework, it is shown that the \ud asymmetry of the proton is consistently described by including only nucleon fluctuations to $|\pi N>$ and $|\pi \Delta >$ bound states. Predictions of the model closely agree with the recent experimental data of the E866/NuSea Collaboration.

Comments: Final version. To appear in Phys. Rev. D