Towards unifying perturbative and Holographic Light-Front QCD via holomorphic coupling

We construct a QCD coupling A(Q(2)) in the Effective Charge (ECH) scheme of the canonical part d(Q(2)) of the (inelastic) polarised Bjorken Sum Rule (BSR) Gamma(p-n)(1)(Q(2)). In the perturbative domain, the coupling A(Q(2)) practically coincides with the