Isovector helicity quark quasi-distributions inside a large Nc nucleon

In this letter, we report the results for the isovector polarized quark quasi-distribution functions \(\Delta u(x,v) - \Delta d(x,v)\) in the large \(N_c\), calculated within the chiral quark-soliton model. It is shown that the polarized quark quasi-distributions present good convergence to the light-cone PDFs in the limit of the nucleon boost momentum \(P_N \to \infty\) (or the velocity \(v \to 1\)), compared to the case of the unpolarized isosinglet distributions.