Target Mass Corrections to QCD Bjorken Sum Rule for Nucleon Spin Structure Functions∗
نویسندگان
چکیده
We discuss the possible target mass corrections in the QCD analysis of nucleon’s spin-dependent structure functions measured in the polarized deep-inelastic leptoproduction. The target mass correction for the QCD Bjorken sum rule is obtained from the Nachtmann moment and its magnitude is estimated employing positivity bound as well as the experimental data for the asymmetry parameters. We also study the uncertainty due to target mass effects in determining the QCD effective coupling constant αs(Q ) from the Bjorken sum rule. The target mass effect for the Ellis-Jaffe sum rule is also briefly discussed. KUCP-76 January 1995 Talk presented by T. Uematsu at the YITP Workshop “From Hadronic Matter to Quark Matter ”, Kyoto, Japan, Oct. 30 Nov. 1, 1994. To appear in the proceedings.
منابع مشابه
Target Mass Effects in QCD Bjorken Sum Rule
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 of the order of a few GeV, where the QCD correction is significant. We show that there exists unc...
متن کامل8 v 1 2 5 Ja n 19 95 Target Mass Corrections to QCD Bjorken Sum Rule for Nucleon Spin Structure Functions ∗ Hiroyuki KAWAMURA and Tsuneo UEMATSU
We discuss the possible target mass corrections in the QCD analysis of nucleon’s spin-dependent structure functions measured in the polarized deep-inelastic leptoproduction. The target mass correction for the QCD Bjorken sum rule is obtained from the Nachtmann moment and its magnitude is estimated employing positivity bound as well as the experimental data for the asymmetry parameters. We also ...
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