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- W2963605890 abstract "We investigate the possibility to draw conclusions on the sign of the spin-dependent gluon distribution, $Delta G(x, Q^2)$, from existing polarized DIS data. The spin-dependent parton distributions $Delta u_v, Delta d_v, Delta {bar u}, Delta {bar d}, Delta {s}$, and $Delta G$ are constructed in the framework of a phenomenological procedure taking into account some assumptions on signs of valence and sea parton distributions motivated by 't Hooft's mechanism of quark-quark interaction induced by instantons. The axial gluon anomaly and data on integral quark contributions to the proton spin, $Delta tilde u, Delta tilde d$, and $Delta tilde s$, are also taken into account. Predictions for the $x$- and $Q^2$-dependencies of the polarized proton and neutron structure functions, $g_1^p$ and $g_1^n$, are compared to experimental data. It is shown that the neutron structure function, $g_1^n$, is especially sensitive to the sign of $Delta G(x, Q^2)$. The results of our analysis supports the conclusion that this sign should be positive." @default.
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- W2963605890 date "1997-07-01" @default.
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- W2963605890 title "On a possibility to determine the sign of the polarized gluon distribution" @default.
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