Further Remarks on Electroweak Moments of Baryons and Manifestations of Broken

The role of nonvalence, e.g. sea quarks and/or meson degrees of freedom in static and quasistatic baryon electroweak observables, is discussed within the phenomenological sum rule approach. The inclusion of nonvalence degrees of freedom in the analysis of baryon magnetic moments explains extremely strong violation of the standard SU(6) symmetry-based quark-model prediction for the magnetic moment ratio RΣ/Λ = (Σ + + 2Σ−)/(−Λ) ≃ .23, while the value RΣ/Λ(SU(6)) = 1 corresponds to the nonrelativistic quark model. We also obtain F/D = .72 for the quark-current-baryon coupling SU(3)f ratio. The implications for the ”strangeness” magnetism of the nucleon and for weak axial-to-vector coupling constant relations measured in the lowest octet baryon β-decays are discussed. The latter shows up the possible role of the induced second-class form factor (the ”weak-electricity”, or pseudotensor form factor) in the extraction of the (g1/f1)-values from the hyperon’s β decay data. 1.In this report we present some further consequences from sum rules for the static electroweak characteristics of baryons following mainly from the phenomenology of broken internal symmetries. The phenomenological sum rule techniques was chosen to obtain a more reliable, though not very much detailed information about the hadron properties in question. The main focus was laid on the role of nonvalence degrees of freedom ( the nucleon sea partons and/or peripheral meson currents ) in parameterization and description of hadron magnetic moments and axial-vector coupling constants. As is known, in the broken SU(3)-symmetry approach, based on the non-relativistic quark model (NRQM) of the ground state octet baryons [1], where B ↔ 2qeven + qodd, and the magnetic moments of constituent quarks in the corresponding baryons B = {P,N ; Σ; Ξ; Λ}, satisfy the relation μ(u) : μ(d) : μ(s) = −2 : 1 : (md/ms), one obtains the familiar expressions for magnetic moments μ(B) ≡ B = (4/3)qe − (1/3)qo, Λ = s, μ(ΛΣ) = (1/ √ 3)(u− d) (1) (herewith, we use the particle and quark symbols the for corresponding magnetic moments). The most spectacular difficulty of the above parameterization is seen from comparing two ratios RΣ/Λ[2] and RΞ/Λ with experimental values [3]–the first one is drastically