Proton Spin Structure at Small-$x$

Feng Yuan; Renaud Boussarie; Yoshitaka Hatta

Proton Spin Structure at Small-$x$

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arxiv 1904.02693 v2 pith:NGUBRWJU submitted 2019-04-04 hep-ph

Renaud Boussarie , Yoshitaka Hatta , Feng Yuan This is my paper

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keywords small-protonspinstructureanalyticalangularapproachapproximation

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abstract

We generalize the Bartels-Ermolaev-Ryskin approach for the $g_1$ structure function at small-$x$ to determine the small-$x$ asymptotic behavior of the orbital angular momentum distributions in QCD. We present an exact analytical solution of the evolution equation in the double logarithmic approximation and discuss its implications for the proton spin problem.

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