Target Mass Effects in QCD Bjorken Sum Rule

Details Target Mass Effects in QCD Bjorken Sum Rule Target Mass Effects in QCD Bjorken Sum Rule

1994-09-30

arxiv.org/abs/hep-ph/9409455v1

Phys.Lett. B343 (1995) 346-350

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX, 10 pages, 2 figures (.ps files) appended after \end{document} as an uuencoded compressed tar file, KUCP-74

Scientific paper

10.1016/0370-2693(94)01507-9

We investigate the target mass effects in QCD Bjorken sum rule. The magnitude of the target mass correction is estimated in a variety of methods employing positivity bound as well as the experimental data for the asymmetry parameters. It turns out that the target mass correction is sizable at low $Q^2$ of the order of a few GeV$^2$, where the QCD correction is significant. We show that there exists uncertainty due to target mass effects in determining the QCD effective coupling constant $\alpha_s(Q^2)$ from the Bjorken sum rule.

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