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- W2024236240 abstract "A contradiction is found between two successful models of SU(6) breaking. A quark-model mixing scheme (56,${0}^{+}$) + (70,${0}^{+}$) for the baryon octet has been devised to explain the ratio $frac{{F}_{2}^{mathrm{en}}(x)}{{F}_{2}^{mathrm{ep}}(x)}$ in the valence-quark region and explains naturally other departures from the usual SU(6) predictions. On the other hand, the gluon-exchange model of SU(6) breaking accounts satisfactorily for the hadron spectrum splittings. The spin-spin contribution from this chromodynamic force is indeed shown to generate a (56,${0}^{+}$) + (70,${0}^{+}$) mixing of the octet. However, it yields a wrong sign for the mixing angle, thus pointing to a contradiction between spin-spin forces of one-gluon-exchange type and the deep-inelastic structure functions in the valence-quark region. Other spin-spin potentials, giving the right sign for the mixing angle, are shown to be also in difficulty, because of the hyperfine structure of excited levels. Finally, a careful discussion is made of the subtle $ensuremath{Sigma}$-$ensuremath{Lambda}$ effect in both approaches." @default.
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- W2024236240 date "1978-09-01" @default.
- W2024236240 modified "2023-10-09" @default.
- W2024236240 title "Phenomenological SU(6) breaking of baryon wave functions and the chromodynamic spin-spin force" @default.
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- W2024236240 doi "https://doi.org/10.1103/physrevd.18.1591" @default.
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