Spin Dependent Structure Function $g_1$ at Low $x$

Details Spin Dependent Structure Function $g_1$ at Low $x$ Spin Dependent Structure Function $g_1$ at Low $x$

1998-03-09

arxiv.org/abs/hep-ph/9803288v1

Acta Phys.Polon. B29 (1998) 1201-1216

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given at the Cracow Epiphany Conference on Spin Effects in Particle Physics, 9-11 January 1998, Cracow, Poland

Scientific paper

Theoretical expectations concerning small $x$ behaviour of the spin dependent structure function $g_1$ are summarised. This includes discussion of the Regge pole model predictions and of the double $ln^2(1/x)$ effects implied by perturbative QCD. The quantitative implementation of the latter is described within the unified scheme incorporating both Altarelli-Parisi evolution and the double $ln^2(1/x)$ resummation. The double $ln^2(1/x)$ effects are found to be important in the region of $x$ which can possibly be probed at HERA. Predictions for the polarized gluon distribution $\Delta G(x,Q^2)$ at low $x$ are also given.

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