engleski

On the instanton induced nucleon strangeness

We report on a calculation of the instanton contribution to the proton strangeness in the MIT bag enriched by the presence of a dilute instanton liquid. We express the proton matrix elements of strange-quark operators (in various Lorentz channels) in terms of a model valence nucleon state and interactions producing quark-antiquark fluctuations on top of that valence state. Only the scalar channel is found to be affected by the interaction induced by the random instanton liquid.

nucleon strangeness; instantons

nije evidentirano