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Semi-inclusive polarized DIS in terms of Melin moments.I. Light sea quark polarized distribustions

A. N. Sissakian·O. Yu. Shevchenko·V. N. Samoilov
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Abstract

In connection with the semi-inclusive polarized DIS, it is proposed to consider the first Melin moments $Δq$ of the polarized quark and antiquark densities, instead of the respective variables $δq(x)$, local in Bjorken x themselves. This gives rise to a very essential simplification of the next to leading order (NLO) QCD and, besides, allows one to use the respective QCD sum rules. An expression for $Δ\bar{u}-Δ\bar{d}$ in NLO is obtained which is just a simple combination of the directly measured asymmetries and of the quantities taken from the unpolarized data.

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A. N. Sissakian, O. Yu. Shevchenko, V. N. Samoilov. 2000-12-14. Semi-inclusive polarized DIS in terms of Melin moments.I. Light sea quark polarized distribustions. https://arxiv.org/abs/hep-ph/0010298

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