Right handed weak currents in sum rules for axial-vector constant renormalization.

The recent experimental results on deep inelastic polarized lepton scattering off proton, deuteron and He together with polarized neutron β-decay data are analyzed. It is shown that the problem of Ellis-Jaffe and Bjorken sum rules deficiency and the neutron paradox could be solved simultaneously by assuming the small right handed current (RHC) admixture in the weak interaction Lagrangian. The possible RHC impact on pion-nucleon σ-term and Gamow-Teller sum rule for (p, n) nuclear reactions is pointed out. PACS numbers: 12.60 Cn, 11.55 Hx, 12.15Ji, 24.80 Ba In comparing sum rules for axialvector constant renormalization with the experimental data one usually assumes that the axialvector constant renormalization λ = gA/gV is a well known value, measured with high accuracy in neutron beta decay. Is it really the case? Let us consider the modern experimental status of neutron beta decay in more details. The axialvector constant renormalization can be extracted either from the neutron life time (tn) or from the electron asymmetry (A) according to the well known formulae: fntn = 2(ft)0−0/(1 + 3λ 2 τ ), (1) ∗Permanent address: The Kurchatov Institute, 123182 Moscow, Russia