Nonperturbative contribution to the strange-antistrange asymmetry of the nucleon sea

Abstract

We give predictions for the nonperturbative (intrinsic) contribution to the $s(x)-\bar{s}(x)$ asymmetry of the nucleon sea. For this purpose we use different light-front wave functions inspired by the AdS/QCD formalism, together with a model of the nucleon in terms of meson-baryon fluctuations. The holographic wave functions for an arbitrary number of constituents, recently derived by us, give results quite close to known parametrizations that appear in the literature.

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• Improved determination of $\bar{d}(x)-\bar{u}(x)$ flavor asymmetry in the proton by BONuS experiment at JLAB and using an approach by Brodsky, Hoyer, Peterson, and Sakai
• Nucleon strangeness polarization from $\Lambda /\bar{\Lambda }$ hyperon production in polarized proton-proton collision at RHIC
• Two-body light front wave functions from general AdS/QCD models
• Quark-antiquark asymmetry of helicity distributions in the nucleon sea
• Study of the $s-\bar{s}$ asymmetry in the proton
• Improved determination of strange distribution function from the global analysis using BHPS model