Small -x behavior of the non-singlet and singlet structure functions g_1

Details Small -x behavior of the non-singlet and singlet structure functions g_1 Small -x behavior of the non-singlet and singlet structure functions g_1

2003-12-02

arxiv.org/abs/hep-ph/0312029v1

Phys.Part.Nucl.35:S105-S109,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at Xth Workshop on high energy spin physics, Dubna, Russia, September,16-20, 2003. LateX 9pp, 4 figs

Scientific paper

Explicit expressions for the non-singlet and singlet structure functions g_1 at the small $x$-region are obtained. They include the total resummation of double-logarithmic contributions and accounting for the running QCD coupling effects. We predict that both the non-singlet and singlet g_1 asymptotically ~ x^{- \Delta}, with the singlet intercept = 0.86 and being more than twice larger than the non-singlet intercept = 0.4. The impact of the initial quark and gluon densities on the sign of g_1 at x << 1 is discussed.

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