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

Alfredo Vega; Ivan Schmidt; Thomas Gutsche; Valery E. Lyubovitskij

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

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arxiv 1511.06476 v2 pith:MHAPDHEQ submitted 2015-11-20 hep-ph nucl-th

Alfredo Vega , Ivan Schmidt , Thomas Gutsche , Valery E. Lyubovitskij This is my paper · ORCID

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keywords nucleonasymmetrycontributionfunctionsgivenonperturbativewaveappear

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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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Strange-antistrange and charm-anticharm asymmetries of pion in 't Hooft model
hep-ph 2024-12 conditional novelty 5.0 of 10

In the 't Hooft model, the first excited pion has a few-percent strange-antistrange asymmetry, and the meson cloud model reproduces it but fails for charm-anticharm asymmetry.

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