Instanton induced spin–spin correlations

Abstract

The QCD instanton can be observed at relatively low energies at Nica collider by studying the spin-spin correlations between the incoming proton and the produced $$\Lambda $$ Λ or $$\Sigma $$ Σ hyperons (or the $$\Lambda $$ Λ and $$\bar{\Lambda }$$ Λ ¯ hyperons). Low Nica energy will allow to better record and to measure the polarization of the hyperon originated by the polarized valence quark(s) in the proton fragmentation region.