The Small $x$ Behavior of $g_1$ in the Resummed Approach

Details The Small $x$ Behavior of $g_1$ in the Resummed Approach The Small $x$ Behavior of $g_1$ in the Resummed Approach

1998-03-25

arxiv.org/abs/hep-ph/9803448v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, ps figures included, sprocl.sty, psfig.sty, and here.sty are required. Invited talk presented at the International Sy

Scientific paper

The double logarithmic terms $\alpha_{s} \ln^{2}x $ are important to predict precisely the small $x$ behavior of the spin structure function $g_{1}$. We numerically analyze the evolution of the flavor non-singlet $g_{1}$ including the all-order resummed effect of these terms. It is pointed out that the next-to-leading logarithmic corrections produce an unexpectedly large suppression factor over the experimentally accessible range of $x$ and $Q^{2}$. This implies that the next-to-leading logarithmic contributions are very important in order to obtain a definite prediction.

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