A Next-to-Leading Determination of the Singlet Axial Charge and the Polarized Gluon Content of the Nucleon

Details A Next-to-Leading Determination of the Singlet Axial Charge and the Polarized Gluon Content of the Nucleon A Next-to-Leading Determination of the Singlet Axial Charge and the Polarized Gluon Content of the Nucleon

1995-10-31

arxiv.org/abs/hep-ph/9510449v2

Phys.Lett. B378 (1996) 255-266

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, TeX with harvmac and epsf, 4 figures in compressed postscript. All the data analysis redone incorporating a recent c

Scientific paper

10.1016/0370-2693(96)00376-0

We perform a full next-to-leading analysis of the the available experimental data on the polarized structure function g_1 of the nucleon, and give a precise determination of its singlet axial charge together with a thorough assessment of the theoretical uncertainties. We find that the data are now sufficient to separately determine first moments of the polarized quark and gluon distributions, and show in particular that the gluon contribution is large and positive.

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